Friday, 12 October 2012

               CNC     LATHE   MACHINE      INFORMATION

                            

                            




Specifications: Vturn-26/110LSB Big Bore Specifications: Vturn-26/110LSB Big Bore
Chuck size 12" Swing over bed 20.47"
Max. turning dia. 14.96" Max. turning length 42.91"
Swing over cross slide 13.77" Tooling 10 pos. turret
X travel 1.96+7.48" Z travel 44.48"
Spindle bore 4.13" Bar capacity 3.58"
Spindle HP 25/20 Spindle nose A2-8
Spindle RPM 0-3500 No. of speed ranges 1
Tool OD & ID size 1x1&2" Type of ways All Box
Rapid traverse 470X, 590Z ipm CNC control Fanuc 18TC
Tailstock quill dia. 4.33" Tailstock quill travel 3.9"
Programmable tailstock Body & Quill Net weight 13,216
Country of Origin Taiwan
Delivery Information:
3-4 days.


                                                  
                                                    

  1. 07-20-2012, 09:13 AM #1
    NewCNCist is offline Plastic
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    Default Bench Top CNC Lathe Opinions

    My company is new to turning and is trying to get a few bench top CNC lathes to do some small ceramic piece turning with. So my question is this: anybody got any manufacturers they have particularly liked? Particularly hated? Why? Any general advice?

    For further background, in our attempts to be economical we now have a MircoKinetics lathe that we have not been very satisfied with. I have read/heard to avoid lathes assembled from Chinese parts, which are typically of lower quality, but obviously more competitively priced. Currently looking into Optimum and MDA precision, but would like some experienced input and more choices. Any opinion on Mach3 control software? Thanks tons for any advice.
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  2. 07-20-2012, 03:06 PM #2
    FredC is online now Cast Iron
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    We are using Omini Turns on a Tsugami Chucker and one on a Hardinge AHC. Between the 2 machines they have run about 30 years trouble free.
    Programing is relatively easy (Different from real CNCs)
    #1 Does not have a tail stock.
    #2 Fairly compact but not really portable if you need to carry them up stairs
    #3 Good precision
    Dyna Mectronics made mills that could be considered bench top, I do not know if they still make lathes and if they or any good or would be bench top
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  3. 07-22-2012, 03:44 PM #3
    Lastuneste is offline Plastic
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    Mach3 is very intuitive and easy to use. However, it kept losing zero at random intervals on a mini-mill I used. I don't know if it was a quirk in the machine or the software.

    Also, if your Mach3 never seems to get G2 and G3 right... try putting a G91.1 at the beginning of every program you write. It has something to do with how the control fetches the zero point for a circle. Use G90 and G91 normally in addition.
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  4. 07-22-2012, 04:38 PM #4
    RDR
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    Hi everyone, i have converted many Denford and Boxford desktop mills and lathes to Mach3, they're not production machines but on small runs they cope well.
    I've never had any problems with zeros or G2 G3 moves with mach, but some people have had problems with control issues on the computer from other software installed. I always set my computers up with XP and Mach3 and nothing else.
    You may find find them a bit thin on the ground in the USA.
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  5. 07-22-2012, 05:24 PM #5
    CBlair is offline Titanium
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    For your application I believe you will find the Omni Turn machines desirable as they are easy to repair and ceramic dust tends to damage machine parts over time. There are several shops locally running them and they have a pretty good reputation. They are not benchtop machines but they are small and accurate and pretty cost effective.

    I can understand if you are not happy with the MicroKenetics machines, they have always been tough to work with.

    Charles
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  6. 07-23-2012, 04:47 AM #6
    BOSTON is offline Stainless
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    Tormach will be releasing a new lathe in 6-12 month...prototypes are made and testing is being done...
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  7. 07-23-2012, 05:12 AM #7
    SIM
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    I looked very seriously at the Omniturns...I never heard a bad thing about them...for what they are. Good, robust, accurate machines but somewhat limited for certain production and fell short where I needed...so went with a larger CNC that was more versatile.


    Small lathe...you may want to look at the Haas Office lathe. I have a few customers that love theirs...I looked into one very quickly, just not enough machine for my application..but given the right circumstances it could have been a real asset for very little space.
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  8. 07-23-2012, 11:35 AM #8
    Zahnrad Kopf's Avatar
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    Quote Originally Posted by SIM View Post
    ...you may want to look at the Haas Office lathe. I have a few customers that love theirs...I looked into one very quickly, just not enough machine for my application..but given the right circumstances it could have been a real asset for very little space.
    Seriously a shame that they don't come with turrets. Only gang. Kills it for me. I'm in the same boat. Missed a Dyna 3500 two weeks ago, by a day. Would likely have been perfect. The hunt continues...
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  9. 07-24-2012, 07:08 AM #9
    Captdave is offline Stainless
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    Why the big need for a turret? I have a Mazak QT-8 and a Hardinge DV 59 with a CNC gang tool attachment and for small parts 1" and less the Hardinge will run circles around the Mazak in regard to cycle time. Its just a matter of marring up the right parts to the right machine.

    There are used Omni turns and Hardinges that pop up on EBay from time to time ~10k or less for some pretty decent machines. If I had it to do over again I would go with the Omni control over a Fagor control any day.
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  10. 07-24-2012, 08:49 AM #10
    Zahnrad Kopf's Avatar
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    Quote Originally Posted by Captdave View Post
    Why the big need for a turret? I have a Mazak QT-8 and a Hardinge DV 59 with a CNC gang tool attachment and for small parts 1" and less the Hardinge will run circles around the Mazak in regard to cycle time. Its just a matter of marring up the right parts to the right machine.
    Simple really. For me, it's more about your last sentence. The types of parts we do are better suited to a turret than a gang.
    And cycle times don't really mean squat for us because it's all prototyping. I'll likely never make another widget like the widget I just made.
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  11. 07-24-2012, 10:28 AM #11
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    Quote Originally Posted by Zahnrad Kopf View Post
    Seriously a shame that they don't come with turrets. Only gang. Kills it for me. I'm in the same boat. Missed a Dyna 3500 two weeks ago, by a day. Would likely have been perfect. The hunt continues...

    Haas sold the gt-20 with a turret like this one:
    1 Haas HAAS CNC CONTROL, Max. 4000 rpm, Haas GT20, , CNC LATHES - Machine Tools - Second hand machinery - Wotol.com

    My old shop teacher just got one in for the shop, he seems to like it. Its a nice sized smaller lathe.

    Jason,
                                                      











Not to be confused with Turing.
This article is about the machining operation. For the generic use of the word, see rotating.

Roughing, or rough turning

Parting aluminum

Finish turning
 This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (January 2010)
Turning is a machining process in which a cutting tool, typically a non-rotary tool bit, describes a helical toolpath by moving more or less linearly while the workpiece rotates. The tool's axes of movement may be literally a straight line, or they may be along some set of curves or angles, but they are essentially linear (in the nonmathematical sense). Usually the term "turning" is reserved for the generation of external surfaces by this cutting action, whereas this same essential cutting action when applied to internal surfaces (that is, holes, of one kind or another) is called "boring". Thus the phrase "turning and boring" categorizes the larger family of (essentially similar) processes. The cutting of faces on the workpiece (that is, surfaces perpendicular to its rotating axis), whether with a turning or boring tool, is called "facing", and may be lumped into either category as a subset.
Turning can be done manually, in a traditional form of lathe, which frequently requires continuous supervision by the operator, or by using an automated lathe which does not. Today the most common type of such automation is computer numerical control, better known as CNC. (CNC is also commonly used with many other types of machining besides turning.)
When turning, a piece of relatively rigid material (such as wood, metal, plastic, or stone) is rotated and a cutting tool is traversed along 1, 2, or 3 axes of motion to produce precise diameters and depths. Turning can be either on the outside of the cylinder or on the inside (also known as boring) to produce tubular components to various geometries. Although now quite rare, early lathes could even be used to produce complex geometric figures, even the platonic solids; although since the advent of CNC it has become unusual to use non-computerized toolpath control for this purpose.
The turning processes are typically carried out on a lathe, considered to be the oldest machine tools, and can be of four different types such as straight turning, taper turning, profiling or external grooving. Those types of turning processes can produce various shapes of materials such as straight, conical, curved, or grooved workpiece. In general, turning uses simple single-point cutting tools. Each group of workpiece materials has an optimum set of tools angles which have been developed through the years.
The bits of waste metal from turning operations are known as chips (North America), or swarf (Britain). In some areas they may be known as turnings.

Contents

Turning operations

Turning specific operations include:
Turning
Längs-Rund-Drehen.jpg
This operation is one of the most basic machining processes. That is, the part is rotated while a single point cutting tool is moved parallel to the axis of rotation.[1] Turning can be done on the external surface of the part as well as internally (boring). The starting material is generally a workpiece generated by other processes such as casting, forging, extrusion, or drawing.
Tapered turning 
a) from the compound slide b) from taper turning attachment c) using a hydraulic copy attachment d) using a C.N.C. lathe e) using a form tool f) by the offsetting of the tailstock - this method more suited for shallow tapers.[2]
Spherical generation 
The proper expression for making or turning a shape is to generate as in to generate a form around a fixed axis of revolution. a) using hydraulic copy attachment b) C.N.C. (computerised numerically controlled) lathe c) using a form tool (a rough and ready method) d) using bed jig (need drawing to explain).[2]
Hard turning 
Hard turning is a turning done on materials with a Rockwell C hardness greater than 45. It is typically performed after the workpiece is heat treated.[3]
The process is intended to replace or limit traditional grinding operations. Hard turning, when applied for purely stock removal purposes, competes favorably with rough grinding. However, when it is applied for finishing where form and dimension are critical, grinding is superior. Grinding produces higher dimensional accuracy of roundness and cylindricity. In addition, polished surface finishes of Rz=0.3-0.8z cannot be achieved with hard turning alone. Hard turning is appropriate for parts requiring roundness accuracy of 0.5-12 micrometres, and/or surface roughness of Rz 0.8–7.0 micrometres. It is used for gears, injection pump components, hydraulic components, among other applications.[3]
Facing 
is part of the turning process. It involves moving the cutting tool at right angles to the axis of rotation of the rotating workpiece.[1] This can be performed by the operation of the cross-slide, if one is fitted, as distinct from the longitudinal feed (turning). It is frequently the first operation performed in the production of the workpiece, and often the last- hence the phrase "ending up".
Parting
Quer-Plan-Drehen.jpg This process is used to create deep grooves which will remove a completed or part-complete component from its parent stock.
Grooving
Quer-Rund-Drehen.jpg Längs-Plan-Drehen.jpg is like parting, except that grooves are cut to a specific depth by a form tool instead of severing a completed/part-complete component from the stock. Grooving can be performed on internal and external surfaces, as well as on the face of the part (face grooving or trepanning).
Non-specific operations include:
Boring 
Enlarging or smoothing an existing hole created by drilling, moulding etc.i.e. the machining of internal cylindrical forms (generating) a) by mounting workpiece to the spindle via a chuck or faceplate b) by mounting workpiece onto the cross slide and placing cutting tool into the chuck. This work is suitable for castings that are to awkward to mount in the face plate. On long bed lathes large workpiece can be bolted to a fixture on the bed and a shaft passed between two lugs on the workpiece and these lugs can be bored out to size. A limited application but one that is available to the skilled turner/machinist.[2]
Drilling 
is used to remove material from the inside of a workpiece. This process utilizes standard drill bits held stationary in the tail stock or tool turret of the lathe.
Rändelwerkzeug.jpg
Knurling 
The cutting of a serrated pattern onto the surface of a part to use as a hand grip using a special purpose knurling tool.[2]
Reaming
The sizing operation that removes a small amount of metal from a hole already drilled.[2]
Threading 
Both standard and non-standard screw threads can be turned on a lathe using an appropriate cutting tool. (Usually having a 60, or 55° nose angle) Either externally, or within a bore.[4] Generally referred to as single-point threading.
tapping of threaded nuts and holes a) using hand taps and tailstock centre b)using a tapping device with a slipping clutch to reduce risk of breakage of the tap.[2]
threading operations include a)all types of external and internal thread forms using a single point tool also taper threads, double start threads, multi start threads, worms as used in worm wheel reduction boxes, leadscrew with single or multistart threads. b) by the use of threading boxes fitted with 4 form tools, up to 2" diameter threads but it is possible to find larger boxes than this.[2]

Lathes

Main article: Lathe
A lathe is a machine tool used principally for shaping pieces of metal, wood, or other materials by causing the workpiece to be held and rotated by the lathe while a tool bit is advanced into the work causing the cutting action. Lathes can be divided into three types for easy identification: engine lathe, turret lathe, and special purpose lathes. Some smaller ones are bench mounted and semi-portable. The larger lathes are floor mounted and may require special transportation if they must be moved. Field and maintenance shops generally use a lathe that can be adapted to many operations and that is not too large to be moved from one work site to another. The engine lathe is ideally suited for this purpose. A trained operator can accomplish more machining jobs with the engine lathe than with any other machine tool. Turret lathes and special purpose lathes are usually used in production or job shops for mass production or specialized parts, while basic engine lathes are usually used for any type of lathe work.

Workholding methods


Collets
  • Chuck: Chucks are a very common workholding method. There are many types, some for round and square stock, and other for irregular shapes.
  • Collet: Primarily used for small round workpieces.
  • Faceplate: A faceplate, drive dog, and mandrel may be used to turn workpieces such as gear blanks.
  • Drive center: Use hydraulic or spring-loaded teeth that "bite" into the end of workpieces and can be used when the entire length of the workpiece must be machined.

Tooling

Main article: Tool bit
The various angles, shapes, and sizes of a single-point cutting tool have direct relation to the resulting surface of a workpiece in machining operations. Different types of angle such as rake angle, side rake angle, cutting-edge angle, relief angle, nose radius exist and may be different with respect to the workpiece. Also, there are many shapes of single-point cutting tools, such as V-shaped and Square. Usually, a special toolholder is used to hold the cutting tool firmly during operation.

Dynamics of turning

Forces

The relative forces in a turning operation are important in the design of machine tools. The machine tool and its components must be able to withstand these forces without causing significant deflections, vibrations, or chatter during the operation. There are three principal forces during a turning process:
  • The cutting or tangential force acts downward on the tool tip allowing deflection of the workpiece upward. It supplies the energy required for the cutting operation.
  • The axial or feed force acts in the longitudinal direction. It is also called the feed force because it is in the feed direction of the tool. This force tends to push the tool away from the chuck.
  • The radial or thrust force acts in the radial direction and tends to push the tool away from the workpiece.

Speeds and feeds

Speeds and feeds for turning are chosen based on cutter material, workpiece material, setup rigidity, machine tool rigidity and spindle power, coolant choice, and other factors.

See also

References

  1. ^ a b Todd, Robert H.; Allen, Dell K.; Al ting, Leo (1994), Manufacturing Processes Reference Guide, p. 153, ISBN 0-8311-3049-0.
  2. ^ a b c d e f g Workshop Technology by W.A.J. Chapman Ph.D. M.Sc.(Eng.), M.I.Mech.E., M.I.Prod.E. Principal Hatfield College of Technology, Hertfordshire first published 1951 part one, two and three published by Edward Arnold (publishers Limited
  3. ^ a b Koepfer, Chris, "Hard Turning as an Alternative to Grinding", Production Machining, 1/22/2010. productionmachining.com, accessed 3/4/2010
  4. ^ "Threading On A Lathe : Modern Machine Shop". Mmsonline.com. 2003-01-15. Retrieved 2012-03-13.

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( Origin : Taiwan Manufacturers & Suppliers )golden Taiwan CNC Drilling Machine manufacturer & supplier. Hanhsin Precision Industrial Co.,Ltd. was established in 1996 and is a professional manufacturer. Our factory incorporates the very latest in hi-tech machinery and testing equipment. A reputable OEM manufacturer and professional fastener manufacturers, Hanhsin Precision Industrial, continues to improve on product quality and assure that each product exceeds the performance and reliability standards expected by customers worldwide. Customers are assured of receiving the most innovative and highest quality professional fastener in the industry. Please do not hesitance to contact us now.
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13. Buildwell Industrial Co., Ltd. : CNC Drilling Machines

( Origin : Taiwan Manufacturer & Supplier )golden Buildwell Industrial Co., Ltd. was established in 1987 and specializes in manufacturing high precision drill chucks, CNC Drilling Machine, N.C. tooling for Machine centers as well as accessories for milling Machine, and grinding machines. We are one of the leading manufacturers and exporters in Taiwan supplying CNC Drilling Machine. In order to cope with ever-increasing demand in CNC Drilling Machine, we have spared no efforts in upgrading our products through constant research and development with innovative designs. Our products are designed to meet the highest engineering standards. Total quality control system is being implentmented so as to ensure reliable quality products. Our products have successfully penetrated the world market. For a reliable quality tool supplier and partner, our...
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14. Michaellin Tools Mfg. Co., Ltd. : CNC Drilling Machine

( Origin : Taiwan Manufacturers & Suppliers )golden Michaellin Tools Mfg. Co., Ltd. was established to develop and manufacture CNC Drilling Machine. Mr. Michael C. T. Lin, the owner of this company, has over 20 years experience specializing in the research and development in CNC Drilling Machine. We have successfully promoted our products in Hong Kong, South East Asia, the United States and Europe. To comply with trends in modernization and computerization in the market place, our R & D department has devoted their efforts in researching CNC computerized engraving machinery since 1987. In the future, we will continue to devote our efforts to producing and supplying our customers with highly refined machinery. Your comments, suggestions and inquiries are most welcome.
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15. 7-Leaders Corp. : CNC Drilling Machines

( Origin : Taiwan Manufacturer & Supplier )golden Video Welcome to visit 7-Leaders, a specialized Tungsten Carbide Cutting Tools manufacturer. Our CNC Drilling Machine products are widely used in many industries, such as automobile, aerospace, machinery, electronic and mould & die and so on. Our product with trade mark "7 Leaders" is not only well-known in Taiwan, but also one of the leading brand in the market. We've built up the fabrication facilities by "WALTER" CNC Grinding Machines which supports us for non-stop automated Production 24 hours a day, 365 days a year. Furthermore, we are equipped with WALTER "Helicheck" inspection system to inspect even tools with diameter less than 0.1mm strictly. Due to our latest grinding technology and innovative tool designed, we have a great reputation in the global CNC Drilling Machine market. Feel free...
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16. Topist Enterprise Co., Ltd. : CNC Drilling Machine

( Origin : Taiwan Manufacturers & Suppliers )golden Topist Enterprise Co., Ltd. is an international trading company. We specialize in widely range of CNC machined parts, CNC Drilling Machine, assorted hardware part, chipboard screw, window screw, spring washers, sintered product, roofing and carriage bolt, T-nut, thread forming screw, micro screw, particle board screw, dowel screw, cars screw, metric Machine screw, masonry screw, etc. Topist has established since November year 1989 and qualified the ISO 9001:2000 since May year 1999. The customer widely spread in Asia, Europe, American Continental, Pacific Ocean area and so on. There is an old saying " a small soldier makes great merits" in China, what does it mean is exactly screw. We perform our job according to the spirit of the old saying to create the most value for the whole society.
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17. JARNG YEONG ENTERPRISE CO., LTD. : CNC Drilling Machines

( Origin : Taiwan Manufacturer & Supplier )golden JARNG YEONG is a specialized high-precision automatic lathe and CNC Drilling Machine machinery manufacturer, supplier and exporter since 1978. We consistency and constantly updated state-of-the-art technology and facility to fulfill customers’ CNC Drilling Machine needs. In 1990, we developed our first automatic lathe and received positive responses from customers. We took out the CE certification of automatic lathe and CNC lathe, exported to EU countries in 2004. In order to meet the dynamic industry needs, we have expanded our factory to 7000㎡, and established the turning & milling combined Machine R&D Center. Today we can provide over 500 lathe machines per year. We have a good reputation and positive responses from the market. If you need further information about our CNC Drilling Machine...
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18. Victor Taichung Machinery Works Co., Ltd. : CNC Drilling Machine

( Origin : Taiwan & Mainland China Manufacturers & Suppliers )golden Video Founded in 1954, Victor Taichung Machinery Works Co., Ltd. started with making conventional lathes in Taiwan and now steadily supplies CNC machining centers and CNC Drilling Machine by devoting our management to non-stop R&D and innovations. All products are marketed globally under the brand names VICTOR or FORTUNE which highlight our strong position as the leading manufacturer in Taiwan. Insisting on "Technology Innovations and Quality Superiority", we're continuously devoted to developing new generation of CNC Drilling Machine. To ensure marketing for our products, we've invested considerably in setting up a global distribution network. To strive for perpetual development and technological innovations, we will keep on manufacturing modern CNC Drilling Machine with greater value added and...
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New CNC Drilling Machine Products :

 
 
                                             
                                        
Both DCT0020 and DCT0040 are utilized in building in the following CNC Drilling and Carving machines. CNC Drilling Machine, lathe


A complete CNC solution is also developed in this project. Significantly, both linear and arc interpolation functions are integrated with DSP to enhance computational capability.




                                    




                                                              
 · 

Computer Numerical Control (CNC) Drilling

Computer Numerical Control (CNC) Drilling is commonly implemented for mass production. The drilling machine, however, is often a multi-function machining center that also mills and sometimes turns. The largest time sink for CNC drilling is with tool changes, so for speed, variation of hole diameters should be minimized. The fastest machines for drilling varying hole sizes have multiple spindles in turrets with drills of varying diameters already mounted for drilling. The appropriate drill is brought into position through movement of the turret, so that bits do not need to be removed and replaced. A turret-type CNC drilling machine is shown below.

A variety of semi-automated drilling machines are also used. An example is a simple drill press which, on command, drills a hole of a set depth into a part set up beneath it.
In order to be cost-effective, the appropriate type of CNC drilling machine needs to be applied to a particular part geometry. For low-volume jobs, manual or semi-automated drilling may suffice. For hole patterns with large differences in sizes and high volume, a geared head is most appropriate. If holes are close to each other and high throughput is desired, a gearless head can locate spindles close together so that the hole pattern can be completed in one pass. For further reference for CNC processes, please refer to the CNC, metal forming section.











                                                   
                                                  

The Haas DT-1 is a compact, high-speed drill and tap machine with full milling capabilities. The machine has a 20" x 16" x 15.5" (xyz) work cube and a 26" x 15" T-slot table. A powerful BT30 taper inline direct-drive spindle provides 12,000 rpm, and allows rigid tapping at speeds to 5000 rpm. A high-speed, 20-pocket tool changer swaps tools quickly, while 2400 ipm rapids and high accelerations combine to shorten cycle times and reduce non-cutting time.
Home • CNC Verticals: Drill & Tap Center
CNC Verticals: Drill & Tap Center
8 - 20 Inch
  • DT-1.jpg DT-1 XYZ Travels
    20" x 16" x 15.5"
    $49,995.00





Specifications
  • Geometry - 1/4 in. (6.35 mm) shank, tapered high-shear flutes, ball-nose tip
  • Length - 2.5in. (63.5mm) ±0.010in.
  • Tip diameter - nominal ±0.0010 in.
  • Runout (TIR) - max 0.0002 in.
  • Max. depth of cut - nominal ±0.005 in.
  • Anticipated Life - depends on material being cut (min 50,000 in, western red cedar)
  • Material - solid submicrograin carbide
  • Operating RPM - CNC certified operation 1k RPM to 40k RPM
Benefits
  • High-shear ball-nose tip cuts smooth 3D contours with reduced stepping, and minimal fuzzing
  • High flute volume supports high feed rates / chip loads
  • High aspect ratio for single pass deep-reach cutting
  • Optimized flute geometry and low TIR insures clean cutting, virtually eliminating sanding and fuzz removal
    (when used with low TIR spindles).
Applications
  • Dimensional signage
  • Precision 3D carving
  • 3D contouring and profiling
  • Cabinetry and furniture making
  • 3D millwork
  • Compatible with CarveWright and CompuCarve woodworking systems.
 Application Data (tool description for CAM software)
  • Shank Diameter = 0.250"
  • Half angle = 6.2° (0.313" dia. tip) 5.4° (0.0625" dia. tip), 3.6° (0.1250" dia. tip), 0.10° (0.2498" dia. tip)
  • Tip radius = nominal ±0.001"
  • Stepdown = Depth per Pass, use 2 X tip diameter for roughing (clearance) and 0.10 X tip diameter for final cleanup
  • Depth of Cut (DOC) = 1.074"
  • Stepover (for final cleanup pass) = 0.10 X tip diameter
  • Stepover (for roughing, clearance pass) = 0.25 to 0.40 X tip diameter
  • Spindle RPM (SPEED) = 5 KRPM to 60 KRPM
  • Feedrate (IPM) = Depends on the material being cut. Do the Sweetspot Test before setting this parameter
    (go to: http://www.precisebits.com/tutorials/calibrating_feeds_n_speeds.htm).
  • Plunge rate = 10 IPM to 25 IPM (again depending on material being cut)
 Taper ball-nose carvin gtools
CM404-100B-001SET Carving Bit Set

4-flute premium tool

US$50 Minimum Order
Item # Description Unit Price Enter Qty.
CM304-0313-100BC  1/32in (0.0313 in, 0.775 mm) dia. ZrN coated, 3-flute 6.2° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.0 in. OAL   $42.95 
CM404-0625-100B  1/16in (0.0625 in, 1.600 mm) dia. 4-flute 5.4° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $32.95 
CM404-0625-100BC  1/16in (0.0625 in, 1.600 mm) dia. ZrN coated, 4-flute 5.4° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $42.95 
CM404-1250-100B  1/8in (0.1250 in, 3.175 mm) dia. 4-flute 3.6° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $32.95 
CM404-1250-100BC  1/8in (0.1250 in, 3.175 mm) dia., ZrN coated, 4-flute 3.6° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $42.95 
CM404-2500-100B  1/4in (0.2498 in, 6.345 mm) dia. 4-flute 0° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $32.95 
CM404-2500-100BC  1/4in (0.2498 in, 6.345 mm) dia. ZrN coated, 4-flute 0.10° Tapered Ball-nose Carving bit, 1.00 in. max DOC, 1/4 in. shank, 2.5 in. OAL   $42.95 
Enter the desired quantity (Qty) then select the "Order" Button.

Order your bits in 10 packs and save 9% off the retail price Most orders ship within one busines day, subject to credit approval and availability.
US$50 Minimum Order


                                                            


Friday, 21 September 2012

CNC drilling machine - FINISHED!

With the new path finding routines in our CNC drilling software, and changes to the firmware to allow the user to manually jog the drill head up and down to get more precise alignment during initial set-up, we're finally happy to say that our cheapo CNC drilling machine is finally complete.
Or at least, complete to a state that we're happy to release for anyone else to have a go at making their own.

The last little part of the test was making sure that the machine could drill a PCB even when placed on the cutting bed at an angle. Here's a video showing exactly that:
The drilling is accurate enough for us now (there's still a little bit of play in the x-axis, but we seem to have done enough to remove/reduce any play in the y axis, even when the bed still needs to travel up-and-down in order to correct for the board being at an angle)

Here's the final board, as drilled in the video:


The holes on the bottom-right-hand edge may not be absolutely bang on, but they're good enough to make the board usable, and are about as accurate as you could get by drilling the board by hand. The photo seems to emphasise the amount of drift - it's probably less than 0.5mm away from the centre of the hole.

Having successfully completed a cnc drill test, we put the machine away!


We reckon our machine fulfills all the criteria set in the CNC drill challenge.

  • You can load NC compatible drill files to operate the machine
  • It cost less than £50 to build, completely from scratch with new (no salvaged) parts
  • It's accurate to within 0.5mm (despite the dodgy cheapo stepper motors)
  • The footprint is less than a sheet of A4 (in storage mode, it's about 210mm x 160mm)


It's been a long (and sometimes painful) journey, but it feels great to finally complete a project, not just to a point where it's working, but to be able to compare it to a list of criteria drawn up at the start, and to be able to tick every one off the list!

Along the way we were introduced to brushless motors and their servo-protocol control boards, created our own stepper motor control boards and our own USB-based protocol for moving them, and proved that rack-and-pinion gearing can be used just as successfully for CNCs as belt drives and leadscrews.

If we were to do the whole thing again?
Probably it'd look pretty similar. Maybe instead of a travelled bed-on-wheels we might use rails (similar to the x-axis) because there is a lot of play in the y-axis. But then again maybe not?

Any improvements?
Of course. Better stepper motors would be a great start. When energised, a stepper motor should have no movement in it at all - our steppers have 1mm-2mm of play because of the internal gearing. But then again, this does give us simple movement commands - no messing about with micro-stepping or any of that tricky stuff! We love the simplicity of the rack-and-pinion approach: belt-drives and leadscrews may be more popular, but we reckon we'd stick with ours.

The custom software is enough to make the device usable, but the protocol for sending x- and y- axis values is so simple that allow anyone else can write their own controller software. The latest firmware not only allows you to set a the number of steps to move in both x- and y- axes, but you can also now provide a "ratio" (for every three steps in x, move one in y for example). This means that if a vector line is broken down into enough parts, the machine could be modified to do simple milling - an idea that Justin from BuildBrighton is already working on!

   
                      
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November 28-30, 2012

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October 19-22, 2012

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October 19-22, 2012
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    We are looking for CNC Mill and/or Lathe Machinists! We partner with local aerospace compa ... who are currently searching for Mill and or Lathe Machinists for temporary-to-hire...
    from Sologig - 1 day ago
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  • CNC Operator

    Stand-by Personnel

    - Tulsa, OK
    CNC Operator - Claremore Run CNC machines mills or lathes 10.00-12.00 an hour with 1 shift diff..temp to perm..the company manufactures sucker rods. Apply for this position in...
    from EmploymentGuide.com - 6 days ago
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7 comments:

  1. Unknown1 April 2013 at 02:33

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