Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Cartierusm on April 18, 2009, 08:58:45 PM

Title: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 18, 2009, 08:58:45 PM

I am installing my VFD for spindle control and I'm using the C6 board from CNC4PC and it says in motor tuning under spindle to change the step pulse to 3. Well this changes the step pulses on my X Y and Z axis from 0 to 3 as well, what will this do to the other axis'. Thanks.

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Hood on April 19, 2009, 05:05:55 AM

It shouldnt do any harm.
Hood

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 03:58:20 PM

Thanks, what does the step pulse do?

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Overloaded on April 19, 2009, 04:12:02 PM

 :)
It basically changes the duration of the pulse ....higher #, longer pulse.
RC

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 04:13:42 PM

So how does going from zero to 3 not affect the motors, or is it just a slight delay in the way the pulses get there? I guess it's better to have them slightly longer than too short where the motor can miss a pulse?

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Overloaded on April 19, 2009, 04:20:54 PM

Picture a 12" ruler with 1 pulse per inch.
The pulses could be 1/8" wide, or 1/2" wide.
Same amount of pulses per foot, just wider pulses with less gap in between.
Some electronics and isolated BoB's and such need the longer pulse so it is seen through the system
RC

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 04:25:58 PM

Ok, thanks for the explanation, just making sure it won't change anything and make the steppers act funny or mis steps.

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Overloaded on April 19, 2009, 04:29:53 PM

Like HOOD said......it shouldn't, and I'll add.....most likely wont.
It will depend greatly on your overall set-up.
Time will tell.
RC

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 05:08:23 PM

LOL, that doesn't sound to reassuring. What should I be looking for?

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Hood on April 19, 2009, 05:13:04 PM

What drives do you have?
Hood

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 06:29:22 PM

It's a Bridgeport Clone with Ballscrews. 3x 1200 oz/in. Keling Steppers, 8078 Keling Drives, 72VDC 20A Keling PS.

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Hood on April 19, 2009, 06:31:43 PM

Keling drives really need 2 or 3 on the pulse width anyway, or at least the ones I have on the coill winder do, they are not actually keling named  but exactly the same.
Hood

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Cartierusm on April 19, 2009, 06:55:47 PM

I use the same exact components on my CNC router, I use quick disconnet plugs to save money as I never run both machines at once. I'll look into that, but I've never had a problem on the router, but then again I'm not sure I'd know what to look for. Thanks for the help.

Title: Re: Quick Step Pulse Motor Tuning Questions Help.
Post by: Hood on April 19, 2009, 06:59:42 PM

Motors just sounded sweeter with mine set to 2 or 3 on the coilwinder.

Hood