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CNC lathe questions
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So I built up a Little Machine Shops minilathe with Mach4 and PoKeys57 ala the Techshops design put together by Joe Katona and Ron Ginger.
Works pretty good for small stuff. Minlathe needs physical tweaking and greater rigidity. I have an Enco 13X40 geared head lathe as well where I am doing more single point threading all the time and needing to do some larger diameter tapered threads. The minilathe just does not have the low end torque. So I keep looking at the mini Vs. the 13x40 and thinking about ball screws retrofitted to the the 13x40. My concerns and thoughts; If I retrofit with ball screws, I am under the impression that I would not be able to use the lathe in the old fashioned mode. The ball screws would allow the cross slide or carriage to move too freely or run away under pressure. Make sense? If I replace the carriage lead screw, which one? The one for turning or threading. I could just disengage the quick change gear box. But the feed rate chart would have to be recalculated. Other thoughts or concerns? Another lathe is out of the question. Thought about getting a small X Y table and mount to the cross slide. Thanks, Dale Grice |
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I had the same concern a few years back when I converted a 10x20 lathe to CNC. I almost added hand wheels? on the steppers but was talked out of it. Rights I have been using the MDI functions on Mach4 and I find that it works great and is a lot faster for single projects. I was missing the hand feed feeling but now I never give it a thought and let Mach4 do it's thing.
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开云体育Hiya Dale: ? If you CNC the 13x40, the first thing to go should be the compound. Make up a solid mount to hold your toolpost at the right height and you will have more rigidity. ? Echoing another poster, when I first CNC’s my machine, I set it up so that I could use the handwheels, but I quickly took them off, and have never looked back, MDI or the MPG do all of the “manual” stuff I need. ? Andy ? From: [email protected] <[email protected]> On Behalf Of Dale Grice
Sent: Wednesday, May 12, 2021 4:15 PM To: [email protected] Subject: [MachCNC] CNC lathe questions ? So I built up a Little Machine Shops minilathe with Mach4 and PoKeys57 ala the Techshops design put together by Joe Katona and Ron Ginger. |
开云体育Not so if you use a double lead ball screw on the Z axis . On my 13X25 lathe I did this mod about 15 years ago and ?I left the acme lead screw in the X axis because backlash comp handle that pretty well. I direct drove both ballscrew and lead screw with 600 oz in servo motors. The z axis ballscrew backspins eaily when I manual move the carriage. Yes you do have disengage the the QC gear box. On my machine I can disengage both. https://www.youtube.com/watch?v=vKfu-8Sv9Bw Dan mauch ? From: [email protected] [mailto:[email protected]] On Behalf Of Dale Grice ? So I built up a Little Machine Shops minilathe with Mach4 and PoKeys57 ala the Techshops design put together by Joe Katona and Ron Ginger. |
开云体育All,Thanks for the info. Would anyone be willing to share specs, such as size of steppers, and pictures of their installations. Dale On 5/13/2021 3:36 PM, Dan Mauch wrote:
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