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### Author Topic: 5 Start Acme  (Read 2667 times)

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#### kolias

• 1,011
##### 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

#### Hood

• 25,846
• Carnoustie, Scotland
##### 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

#### kolias

• 1,011
##### 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

#### ger21

• 6,286
##### Re: 5 Start Acme
« Reply #3 on: January 26, 2011, 05:29:47 PM »
Yes.
Gerry

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#### kolias

• 1,011
##### Re: 5 Start Acme
« Reply #4 on: January 26, 2011, 05:33:25 PM »
Thanks Gerry
Nicolas