Re: Unimat 3 power feed attachment (#150.300) modification #U3accesory #unimat3
¿ªÔÆÌåÓýI went as far as adding a slotted disk to the spindle for my ELS.?
But with both a homebuilt Gingery Lathe and a Southbend outfitted with my ELS I¡¯ve never really needed to thread with the Unimat.? And the one thing my ELS requires is a reasonably rock solid spindle speed which my ELS doesn¡¯t have.? So the plan was to first add a bigger motor and then toothed belt to the Z axis like the photo of a Unimat I found online. ? The Sherline did have adequate motor speed and a friend made good use of the ELS on his unit. Since I still have about 80 ELS kits left I guess I should assemble another one and add a stepper motor to the X axis. John ? From: [email protected] [mailto:[email protected]] On Behalf Of Michael Karliner via groups.io
Sent: November 27, 2024 7:10 AM To: simon mills; [email protected] Subject: Re: [Unimat] Unimat 3 power feed attachment (#150.300) modification #U3accesory #unimat3 ? I've been thinking about a stepper motor based power feed for the Unimat for a while. I'm also thinking about a second stage of the project to make a full electronic gearbox by putting a rotary encoder on the headstock to track rotation. ? Are the group as a whole interested in me working on this and releasing the electronic and physical designs? of you are interested. ? Basically, a standard NEMA 17 stepper should be able to drive the leadscrew, and I can print a coupler out of flexible filament for minimum backlash, together with a mount mount design to go on the baseboard. There are a few options for rotary encoders, and a modern microcontroller like a Raspberry Pi Pico should be good for speeds up to say 600 rpm. ? For those who don't have access to 3D printers and the like, I may be able to make partial kits. ? Thoughts, comments? ? Mike |
