Looking for advice? Is my DB25-1205 breakout board faulty?

The motor specification you linked to states 1.8 degrees per step so Motor Steps Per Revolution should be 200.

With 10 microsteps, a 1:1 ratio and a 5mm pitch you should end up with a scale value of 400. (200 x 10 x (1/1) x (1/5))

Cheers, Phill

That's great Phil. Thanks for that (and showing how it is worked out).

I've found another breakout board in my stash of bits 'n bobs so I'll try and change my old one when I get chance (hopefully tonight) and then report back.

Will also update the settings as per your formula.

Thanks again

John

phillc54 wrote: The motor specification you linked to states 1.8 degrees per step so Motor Steps Per Revolution should be 200.

With 10 microsteps, a 1:1 ratio and a 5mm pitch you should end up with a scale value of 400. (200 x 10 x (1/1) x (1/5))

Cheers, Phill

Just another question regarding this. My drivers ( www.wantmotor.com/product/dq860ma.html ) have dip switches on them to allow me to select the number of 'microsteps'. Should I be selecting 200 on here to reflect the Motor Steps Per Rev figure? Or can I select as many as I want on here and it will split the 200 per rev down to whatever number I select in order to add more resolution??

Also, should the "Driver Microstepping" value in LinuxCNC reflect whatever I've selected on the Dip Switches of my driver?

Thanks

The speed of your base thread (and the break out board) will put a finite limit on the maximum frequency your motors can run at. I'd start with 10x microstepping and see how it goes. That means it will do 2000 steps per motor rev. or as Phil said 2000/5 (400) steps per mm on a 5mm ball screw. All Linuxcnc cares about is the number of steps per device unit (mm or inch). Thats what goes in the ini file, anything else is a convenience in stepconf (which I've never used).

Hi Rod,
Thanks for the advice. So am I setting the dip switches on my stepper drivers to be 400 then? Or am I setting them to 2000?

Sorry if this is a stupid question but I'm just getting a bit confused between the settings on LinuxCNC and the settings on the stepper driver?

Thanks for your patience.

John

Both your hardware and Linuxcnc need to be in sync.

Your stepper is a bit confusing but its all based on the 200 steps/rev (1.8 deg/step).
1x stepping = 200 and is not supported
2x stepping = 400
10x stepping = 2,000

So its 2,000 is what you need.