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Offline kolias

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5 Start Acme
« on: January 26, 2011, 09:25:57 AM »
This is my first time I will use a 1/2-10, 5 start ACME screw and I don’t really know where the 5 start fits in the calculations.

Assuming the stepper motor is fixed at 200 steps per turn and my driver is set at full step:

Acme 10 pitch, 10 turns per 1”, divided by 5 starts = 2

Then at Full Step:  0 x 200 = 200 x 2 pitch = 400 per 1”
or at 1/8 Step: 8 x 200 = 1600 x 2 pitch = 3200 per 1”

Is the above correct?

Thank you
Nicolas

Offline Hood

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Re: 5 Start Acme
« Reply #1 on: January 26, 2011, 10:13:02 AM »
Yes, calcs are correct :)
Please dont screw around with full or half step if you dont have to, you will get much nicer motion from microstepping.
Hood

Offline kolias

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Re: 5 Start Acme
« Reply #2 on: January 26, 2011, 05:07:39 PM »
Yes, calcs are correct :)
Please dont screw around with full or half step if you dont have to, you will get much nicer motion from microstepping.
Hood

Sorry dont understand microstepping. Do you mean 1/8, 1/16 etc. is better than full or half step?

Nicolas

Offline ger21

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Re: 5 Start Acme
« Reply #3 on: January 26, 2011, 05:29:47 PM »
Yes.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html

Offline kolias

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Re: 5 Start Acme
« Reply #4 on: January 26, 2011, 05:33:25 PM »
Thanks Gerry
Nicolas