Re: [CAD_CAM_EDM_DRO] Home built machine setup, perpendicularity

In a message dated 7/7/2005 8:59:56 A.M. Central Daylight Time,
sariddle@... writes:

My main questions is
if I go to the 2 screw system and I am using stepper motors how do I
initially when build this machine get my X and Y axis perpendicular? Assuming that
each X and Y rail setup is straight to start with.<<
Please don't take this as scarcasm, but... "VERY carefully!" I built a
very large X-Y woodworking router table (1.5 x 3.5 metres) for a firm in
England 20 years ago, and used two screws for "X" just as you describe. I
connected them with TIMING BELT, and used the largest stepper motor Superior
Electric made. (Their chopper-drive cost more than the motor!).

However, that experience has shown that building the gantry STIFFly
precludes need for two screws, so the accompanying hassles were eliminated a couple
years after installation. One motor, ONE screw. Square during set-up?
Measure. Build with precision in mind and fingertips. Measure again. Keep
everything clean!

Lotsa luck! Jan Rowland





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