re:Timing Belts vs. Rack and Pinion drive(terminology)
Posted by
ballendo@y...
on 2000-10-23 11:21:23 UTC
Terry,
If it moves, it's called a gantry. If it's fixed, it's called a
bridge.
Ballendo
P.S. There are some VERY expensive machines using timing belt(kevlar
or steel reinforced) drive. The "fixed belt, moving motor" type you
propose for your X axis(gantry) drive is used often where high speeds
are necessary.(pick and place apps) Also where long travels would
make the tensioning and "slack" of a continuous belt problematic.
Note that these expensive machines use the belt(s) only for drive,
encoders(usually shaft style) are used for position. I have used the
belts for position also, and would agree with the recommendations
Randy A. gave you.(earlier post)
<snip>am planning to use a 200 oz-in stepper for the trolley and a
If it moves, it's called a gantry. If it's fixed, it's called a
bridge.
Ballendo
P.S. There are some VERY expensive machines using timing belt(kevlar
or steel reinforced) drive. The "fixed belt, moving motor" type you
propose for your X axis(gantry) drive is used often where high speeds
are necessary.(pick and place apps) Also where long travels would
make the tensioning and "slack" of a continuous belt problematic.
Note that these expensive machines use the belt(s) only for drive,
encoders(usually shaft style) are used for position. I have used the
belts for position also, and would agree with the recommendations
Randy A. gave you.(earlier post)
<snip>am planning to use a 200 oz-in stepper for the trolley and a
>300 oz-in stepper for the bridge drive.
>
>I have a design in mind that will use a stationary timing belt along
>the x axis with the motor mounted to the bridge. The trolley (torch
>mount)would be moved with a continuous belt (band) where the motor
>is fixed to the bridge.
>Thanks,Terry