I currently run my 3/4" acme at 720 rpm for 120" per minute, down from 150" per minute because my motors can handle the speed but the rods whip to much for me. It's smoother at 720 than at 900 rpm. My longest screw is 48" long.
One way to get around this problem is to get 1 pitch screws and gear it way down. Then you only need 100 rpm to go 100" per minute. Rack and pinion or belt drives are also an option, but it's hard to get the backlash out of the gearbox you need for those systems.
Eric
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I wish it wouldn't crash. |