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### Author Topic: Metric steps per setup ( quick question )  (Read 2737 times)

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#### actionkat

• 4
##### Metric steps per setup ( quick question )
« on: November 23, 2010, 08:41:39 AM »
Sorry for the Nub question but the more I read the more I'm confused

Uk so going to run metric.
Gecko G540 with 1.8 steppers
Ballscrew 1605

when I set steps per unit this is what I think I need to put, If someone could confirm I have it right would be of great help

1.8 * 360 = 200 steps for motor
200 / 5 (5mm ballscrew move) = 40 steps per unit

so I make that one turn to move 1mm is that what I should have,
I have seen imperial setting where lead is  multiplied to the motor steps hence why I'm confused
cheers
KAT the Noooooob

#### Hood

• 25,846
• Carnoustie, Scotland
##### Re: Metric steps per setup ( quick question )
« Reply #1 on: November 23, 2010, 09:22:42 AM »
You need to take account of the Geckos micro stepping which is 10 so each rev of the motor is 200 x 10 so your final Steps per will be 2,000/5 = 400

Hood

#### actionkat

• 4
##### Re: Metric steps per setup ( quick question )
« Reply #2 on: November 23, 2010, 09:49:14 AM »

I wasn't sure if the G540 auto switched to micro steps and full steps when need, so just needed to put the full step
So I take it's set to the max steps for the drive ie x10 microsteps
KAT

#### Hood

• 25,846
• Carnoustie, Scotland
##### Re: Metric steps per setup ( quick question )
« Reply #3 on: November 23, 2010, 10:12:18 AM »
Yes the drive I think may switch to full step when moving fast but that is done internally in the drive and Mach knows nothing about it, so you need to feed the drive with the value calculated with the microstepping.
Hood

#### actionkat

• 4
##### Re: Metric steps per setup ( quick question )
« Reply #4 on: November 23, 2010, 11:53:09 AM »
Thanks alot Hood that clears it all up for me
cheers
Kat