+- MetalworkingFun Forum (http://www.metalworkingfun.com)
+-- Forum: Machining (http://www.metalworkingfun.com/forum-5.html)
+--- Forum: CNC (http://www.metalworkingfun.com/forum-28.html)
+--- Thread: Stepper Motor Question (/thread-3053.html)
Stepper Motor Question - Vinny - 01-28-2016
I've decided to automate my cheap CDCO rotary table. I have all the electronics except the stepper motor. Well I have a stepper motor but it's WAY too big for this, which is fine 'cuze it's really intended for some level of CNC on my 7x.
So I'm looking at steppers. Is a NEMA 17, 40 oz/in motor sufficient to drive a rotary table?
RE: Stepper Motor Question - arvidj - 01-29-2016
I had the same question years ago. It was pointed out that the worm on my table was 90:1 so the big deal was the need to overcome the friction rather than overcome what ever mass based inertia from what might be on the table. A NEMA 23 was recommended. I have the motor, the tables, the stepper driver and the controller ... http://www.worldofward.com/rotarycontroller/ ... but have not gotten a round-to-it to try it out.
http://divisionmaster.co.uk/divisionmaster.html for suggestions.
RE: Stepper Motor Question - EdK - 01-29-2016
I have a NEMA 23 stepper motor if you want one for the cost of shipping.
Ed
RE: Stepper Motor Question - arvidj - 01-29-2016
(01-29-2016, 11:58 AM)arvidj Wrote: I had the same question years ago. It was pointed out that the worm on my table was 90:1 so the big deal was the need to overcome the friction rather than overcome what ever mass based inertia from what might be on the table. A NEMA 23 was recommended. I have the motor, the tables, the stepper driver and the controller ... http://www.worldofward.com/rotarycontroller/ ... but have not gotten a round-to-it to try it out.
http://divisionmaster.co.uk/divisionmaster.html for suggestions.
More data points that might be of interest ...
http://www.sherline.com/8700pg.htm ... Stepper Motor120 oz-in, 2 Amp, NEMA 23 Frame size, 400 steps per revolution
http://bbs.homeshopmachinist.net/threads/45118-Stepper-size-for-a-Rotary-Table?p=616484#post616484 ... for an 8 inch table ...
RE: Stepper Motor Question - chucketn - 01-29-2016
I used a NEMA23 with my Arduino setup to control a 4" Vertex RT, which is 90:1. Works great. I have made several gears with it.
Chuck
RE: Stepper Motor Question - Vinny - 01-29-2016
(01-29-2016, 12:42 PM)EdK Wrote: I have a NEMA 23 stepper motor if you want one for the cost of shipping.
Ed
Depending on the length, I will probably take you up on that. PM about to be sent.
Thanks Everyone!!!