RE: [CAD_CAM_EDM_DRO] Ball screw pitch question please

Mach2/3, at least, can use different pitch screws with no problem-you just
have to calculate the number of steps per unit of axis travel, and enter it
in the right spot for each axis.

I'm sure other controller software has similar capabilities, but I'm not
really familiar with other pavckages.

Andy Wander
Verrex Corporation

-----Original Message-----
From: sf7108 [mailto:sf7108@...]
Sent: Wednesday, April 13, 2005 12:15 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Ball screw pitch question please




Hello all,I have been lurking for a while and now I have a question
that I hope someone has a answer to my concern.I have been building a
bench top CNC from whatever I can machine plus parts from e-bay and
parts I find.Basic concept of what I have is Thomson rails and ball
screw on Z axis with .2 pitch per rev,and on X&Y,the same Thomson
rails,but with .5 pitch per rev.How will the controller(which I don't
have yet,nor have any idea of what to choose including motors)
understand the pitch differance's so that it can operate properly.I'm
still trying to put a spindle together at the moment,so all I have
now is manual axies until I select my servo's or steppers.It's
roughly 16" X,8" Y,9" Z travel machine.I hope I haven't shot myself
in the foot by not getting common pitch screws:(

Regards,Steve








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