Tiddy CNC.

[TonyD]

Hello Dean. That would have been all I needed to see smoke! Its great building the thing but setting it up is nerve racking (no pun intended) :) I watched the youtube videos on Mach3 homing *a lot* before I finally hit the button, thankfully Z and Y homes nicely. X groaned too much so I stopped to investigate.

I do have the RS232 cable, tired 3 pc's before I could get comms to the drives but I did get there, havent run the protune software yet, will add that to the list for tomorrow. I'm assuming that the racking was becuase one motor was running, the other wasnt.

Currently, kernel speed (from ports and pins screen) is 35KHz, Motor Slaving & pins appears fine. 3 home switches fine, estop circuits pilz etc fine. I cant see where to check the SS frequency, in the plug in control screen I just get mach3 buffer time, 1000ms, PLCM buffer 500, accell overshoot 20%, plcm feedrate for DRO 1075.

I'm using ballscrews with 5mm pitch. For X,Y,B motor settings are 320 steps, velocity 4000, acceleration 1000, step pulse 5, dir pulse 5
For z its 320,3000,300,5,5.

I'll definately run protune tomorrow, thanks for the advice. Before the gantry was bolted to the ballscrews it run quite well, there's a lot of mass there so it wasnt really easy to push but could move it about easy enough. That leads me to conclude that the linear rails are perpendicular. Now its bolted to the ball screws when I release the left hand side binding the right motors is really more stiff to rotate with no power to the drives than the left, so I'm looking at the bearing mounting for the ball screw on the left side of the machine, I may be able to shim it a little, I'll take more detailed measurements tomorrow and see if I can determine what the resistance/binding is... All advice, as always, appreciated :) thanks.

[JAZZCNC]

Yep just a motor wire to fallout while Jogging would fry lots of cheaper drives.!

Are you using the USB SS or ESS.? in either case they don't use Kernal speed but it's best to set it at default 25Khz.

If using ESS then look in Plug in control and choose ESS Config. On left you'll see Max Step Frequency for each axis and Spindle. Set to 128Khz you won't need any higher than that.