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Topics - collincv

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General Mach Discussion / Jerky Jog before I even Code
« on: March 26, 2019, 01:19:41 PM »
Hey Guys,

I got some (a lot) of jerk in my stepper when I jog.  Sitting on cardboard on my Kitchen table it sounds like a midget with a hammer beating it to death.  I have wired up my X stepper and only that.  I'm trying to get good movement before I move on to ordering more material and parts.  I'll list the specs below.

Hardware:
Dell M70 Laptop XP (circa 2005) with docking station including parallel port
3 PCS Nema 34 Stepper Motor with Dual shaft 1600oz-in holding torque
3 PCS Stepper Driver with 7.8A replacing MD882
3 PCS  Power Supplies for  350W,60VDC
1 PC Breakout Board

Settings:

CV is on
Dip Switches are set to 2000 pulse/rev
Dip switches are set to 3.5 peak amps
Wiring is correct to my knowledge from everything I've seen so far
Ports and Pins are correct from every forum/tutorial i've seen (have to have steplow active on in order to get movement)
kernel speed is 25Khz
MaxNC mode is off
look ahead is at 20 lines

Here is where I am lost.  Everyone and I mean everyone has told me the steps per in motor tuning is what you need to mess with.  It was set at 2000, which is what my dip switches are set at. (no one has ever said anything about step pulse or dir pulse (they are both set at 0)).  From what I understand the 2000 is how many steps to make an inch or mm, whatever your settings are. Where am I going wrong?  Any advice is appreciated.

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