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Hi Group, I added photos of the GEM500G 3 axis conversion to the GEM500G Mill folder. The steppers are 720oz/in with G201 drives, direct drive to the ballscrews. I made my own double-nut design

Linear - without a shadow of doubt. Here's why : http://www.heidenhain.com/posmeas.html

I don't know if this will help, but a google search for "T4500" DOS Download turned up several URL's. One looked interesting, so I followed it. http://209.167.114.38/support/Tsbs/300/tsb0393.htm It

...or as many others have done, use toothed "timing belt" pulleys. Regards, Tony

you need Some things to consider: Oxy/fuel works fine for steel and soft iron. It is a poor method to cut aluminum, copper, brass and other types of metals. If all you want to cut is ferris metals

Jan, i am going to use chain instead of leadscrew or rack and pinion. most likely in conjunction with cable to reduce inerta loads Bob

Hi All I am new to this list so herewith a small introduction. I have built a few 4 axis polystyrene cutters as well as a 3 axis router table. I mainly use these for hobby use (radio controlled

Why not use oxy / fuel? A cutting torch is about 150 and then all you need is the hose, arrestors, regs and two bottles. I have a Thermal Arc (Made by Thermadyne, who make Thermal Dynamics)

John A. McFadden wrote: Yup, this is basically a trav-a-dial. I think they use a brass or bronze roller under a fair amount of pressure. They just use the mill table or lathe ways as the

Hi Bob Try http://www.bootdisk.com you can download the boot disk from here. If you have a cdrom in the notebook, you may need specific drivers for it. Try www.toshiba.com look in the support/driver

b564htf wrote: What serial output? Most DROs don't have a serial output. But, the real reason is most DROs update about 2-5 times a second. That would allow you to move about 1 inch per hour

alex wrote: Sprockets and chains, unless very carefully designed have an inherent cogging effect that causes cyclical errors every tooth, and then the chains have variations in pitch from roller to

Hi Group, I picked up a Toshiba T4500 486\25 laptop for my CNC router so power brownouts wont damage the machine or work in progress. Its loaded with windows 31 and i would like to reformat it

Hi Group, I intend to use chain drive on my router. Can anyone advise the correct spring tension needed for #25 chain (1/4") Regards to all Bob Thomas

Ball screws are practically anti-backlash, nevertheless, FYO, you'd basically put the two nuts back-to-back, and screw them together, until they almost 'bind'. now you have a backlash-free nut. Of

This is essentially what a Trav-a-Dial does, except the roller is steel, not rubber. The company that makes them, Southwestern Industries, also makes a CNC control called a ProtoTrak which uses

I have the opportunity to try to squeeze one of these machines into my garage and I have been having difficulty finding out the dimensions of this beast. This is an early 1980's Boss5 / stepper motor

Camtronics Some ballnuts has one end with outside fine treads on it, put both ballnuts agaist each other and using the adjusting outside nut you can put pressure on the two ballnut

Check out the "Shooting Star" DRO's. They use a (plastic-loom, covered) rack, driving a pinion, coupled to an encoder, and are very reliably, and pretty accurate, as long as you mount them

Alex, It's not merely a backlash issue. (Although, a properly designed roller chain transmission *must* have some slack built in. As any kind of roller chain meets the sprocket, and changes from