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Topics - Jannes20

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General Mach Discussion / HELP! Motors "lock" when going reverse!
« on: April 27, 2015, 10:31:21 PM »
This is my first CNC experience and I'm having trouble

Whenever I try to jog the motors (XYZ) forward, it works fine, but when going reverse (negative) it moves for about a second then it seems like it "locks" then it doesn't move at all.

One time I got Z and X to move both forward and backward but when I tried moving Y, nothing happened, then X and Z won't move at all anymore. I restarted Mach3 and the machine and it"s back to it's old problem - "locking' when going reverse.

Also, sometimes they move but sometimes they don't. It's a moody machine.

Is there a problem with my settings?

(in mm)
--Pins
Port 1, 0x378 (according to my system)
X axis - Step Pin 2, Dir Pin 3 (Dir Low) (Step Low Active) Pin 1, Port 1
Y axis - Step Pin 4, Dir Pin 5 (Dir Low) (Step Low Active) Pin 1, Port 1
Z axis - Step Pin 6, Dir Pin 7 (Dir Low) (Step Low Active) Pin 1, Port 1

Probe Port 1, Pin 15, (Active Low) - not sure about this one though
Estop Port 1, Pin 10, (Active Low)
Enable1 Port 1, Pin 14

--Spindle Setup
Disable Flood/Mist relays checked

   Motor Control
Use spindle Motor output checked
Step/Dir Motor checked
PWM base Freq. 5
PWM Min 0%

--Motor Tuning
X Axis Steps Per 200, Velocity 2000, Acc 200, Step Pulse 3, Dir Pulse 1
Y Axis Steps Per 200, Velocity 2000, Acc 200, Step Pulse 3, Dir Pulse 1
Z Axis Steps Per 200, Velocity 800, Acc 150, Step Pulse 3, Dir Pulse 1


Any ideas?  ???





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