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Topics - Bleker

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General Mach Discussion / Intermittent Stepper Stalling
« on: September 09, 2012, 04:27:22 PM »
Hi,

I have a problem with Mach3 or my machine. I have a intermittent stepper stalling problem.

I can jog the machine at 8.5 m/min, all axis’s moving at the same time with no problem. The stalling comes in when I run Gcode.

It is not always at the same place, time or the same axis. Normally it will only happen after about 25min of cutting, plus or minus a few min. After the first stall I ref.home  and try to resume with the cutting, but it will just keep on stalling. Not in the same place and not the same axis.
If I restart Mach then I can cut without stalling for plus minus 25 min, sometimes this will work, but not always, might get a stall sooner. 
The stalls only occur on the X,B or Y axis, never had a Z axis stall. 

The Machine:

X and B axis slaved together with 585 oz/in steppers each, direct drive on a 3m ball screw, 10mm lead. Separate home switches.
Y axis is a 260 oz/in stepper also direct drive on a 2m ball screw, 10mm lead.
Z axis is a 120 oz/in stepper with small ball screw and 5mm lead.
X, B and Y are driven by the same type and size drivers and are connected to a 48v, 10 amp supply. The drivers are set to 10 micro steps and the amps to 3.7 amp.
Z axis has its own 30v,3amp supply.
 Motor settings on X, B, and Y are set to 7m/min and acceleration to 1000 with 200 steps per/ mm. The step pulse is set to 10us and direction to 5us.
Mach is set to a 35KHz kernel speed.

Currently I’m cutting 17mm thick chipboard at 5m/min and 8mm deep per pass.

I include my xml.

Then there is another problem. All the motors stall on the M3 command. Even if I disable my BB relay in the output settings, it will still stall all the axis’s. If I press F5 when the machine is running all the axis’s stall. I have to disable the ‘use Spindle relay’ in the settings otherwise when the program calls a M3 command the machine stalls out. The relay works correctly, it starts the router but then the machine stalls. I have tried it without power to the router and the same thing happens, even with the wires disconnected to the BB relay it still stalls.
I will appreciate any advice, thanks.

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