phantomcow2
10-03-2005, 03:46 PM
Alright from what I understand, a stepper motor has the most torque at lower speeds.
Well my stock HF micro mill has ACME screws with a fine pitch, .050 per revolution. So obviously it would require the stepper motor turning it to spin at a higher RPM to achieve faster Rapids or cutting speeds. So i was thinking, what if I put something with say a .200 or even .5 pitch. Like one of those Kerk motion leadscrews.
Then wouldnt the motor have to spin at a lower RPM to achieve the same movement as the .050 stock screw? And this would mean it has higher torque, which nobody complains about. Also i would think rapids would be faster, not that it matters a hell of a lot for a small mill like mne, buts it cool anywys.
I was thinking about buying a leadscrew like the one here on ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=7551008464&ssPageName=STRK:MEWA:IT
Are all of my assumptions correct? Would i be making a mistake if I went ahead with a leadscrew like the one shown on ebay, am i overlooking some fact?
Well my stock HF micro mill has ACME screws with a fine pitch, .050 per revolution. So obviously it would require the stepper motor turning it to spin at a higher RPM to achieve faster Rapids or cutting speeds. So i was thinking, what if I put something with say a .200 or even .5 pitch. Like one of those Kerk motion leadscrews.
Then wouldnt the motor have to spin at a lower RPM to achieve the same movement as the .050 stock screw? And this would mean it has higher torque, which nobody complains about. Also i would think rapids would be faster, not that it matters a hell of a lot for a small mill like mne, buts it cool anywys.
I was thinking about buying a leadscrew like the one here on ebay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=7551008464&ssPageName=STRK:MEWA:IT
Are all of my assumptions correct? Would i be making a mistake if I went ahead with a leadscrew like the one shown on ebay, am i overlooking some fact?