G540 and larger steppers

[Jkountz]

I see alot of package deals with the G540 and they seem to come bundled with 381in.oz motors more often than not. On Keling Inc's website they offer this package but they also sell separately a larger 495in.oz motor. Would these motors be a good match for the G540 or is a 381in.oz motor about as big as you want to go with it?
I like the features and all of the G540 but would like to have a little more torque since my gantry is coming in near 150lbs.

[awerby]

for the G540. They are quite suitable for small machines run by 23-frame motors, but not for large ones. If you look at the Geckodrive site, you'll see the motors that they've sourced and recommend for use with it. But if you're trying to push a 150 lb gantry around, you'll need more torque. You can get that by gearing down, but steppers are already on the slow side - gear them down much and they just crawl. For your project, you'll want 34-frame motors (if not servos) and fast (low-pitch) screws. Get drives that are suitable for those motors, like a Gecko 203Vs. They'll handle more voltage, so your steppers will run faster, which is a good thing.

Andrew Werby
ComputerSculpture.com — Home Page for Discount Hardware & Software

Originally Posted by Jkountz I see alot of package deals with the G540 and they seem to come bundled with 381in.oz motors more often than not. On Keling Inc's website they offer this package but they also sell separately a larger 495in.oz motor. Would these motors be a good match for the G540 or is a 381in.oz motor about as big as you want to go with it? I like the features and all of the G540 but would like to have a little more torque since my gantry is coming in near 150lbs.