Master and Slave servo

[Builder]

Hello

In need of information regarding this type of set up. Designing a 4'x16' moving gantry. The Gantry will be about 200-250 pounds, Thk blocks and rails. How would I size the servo's? What programs would support a setup like this?
Oh yea, I'm new to this but I need a machine that size and commercial is way out of my price range. Advice or Criticisim Welcomed

Thanks
Tony

[Al_The_Man]

Are you using a rack & pinion method for the X axis? If so you will certainly require some kind of gearing or reduction between the motor and rack. Both Galil and Acroloop motion control cards offer one axis slaved to another for master and slave servo operation for dual servo's on the X.
Al

[Builder]

Al

Thank you for your response, but all those boards are jibrish to me. Also reading about the software it doesn't seem compatable with the programs I've read about on this forum. I could/probably be wrong in that regard!

As for the travel on the gantry I'll be using the "Hiwin" precision ground screws. Tolerences have to be tight and the rack isn't that precise. Hiwin said i can get away with a single screw with a big motor.

The Ajax System looks good and reasonably priced. I'm wondering if that could handle the motor requirements. Any other thoughts would be helpful.

Thanks
Tony

[Al_The_Man]

Originally Posted by Builder Also reading about the software it doesn't seem compatable with the programs I've read about on this forum. I could/probably be wrong in that regard! As for the travel on the gantry I'll be using the "Hiwin" precision ground screws. Tolerences have to be tight and the rack isn't that precise. Hiwin said i can get away with a single screw with a big motor. Tony

One of the forums here for compatible software packages that uses Galil is Camsoft.
You did not indicate what type of gantry you are designing i.e. router, Plasma or....? and the degree of accuracy.
When you indicated a travel of 16 feet I did not think you would be going with a screw. The vast majority of commercial router & plasma tables I have come across use rack and pinion, if meshing is done correctly they can be very accurate, also precision rack is available.
Also for a gantry weight of 250lbs the inertia will be such that if you require a high feed rate with rapid acceleration you will probabally be in need of some kind of reduction between motor and drive.
Al