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Mach3 under Vista / Parallel port and Mach3 working but skipping steps
« on: August 10, 2012, 05:01:08 AM »
Hi
I can control my CNC Mill using Mach3 but have skipping steps and speed changes on all axis motors at random times and places.
I have:
Windows7 32bit
parallel port on motherboard, set to EPP
parallel optical breakout board
3x 2M542-N Stepper Drivers
3x Nema 23 Motors
I have already proved there is no wiring problems or noise(see below), and the problem happens even when the motors are disconnected from the CNC machine so it cant be missalignment of the machine or rough spots etc.
I made a little circuit using NE555 timer to control the motors via the 2M542-N motor drivers, bypassing the PC. There was no skipping steps or speed issues at all.
Therefore I can only assume the problem is somewhere at the PC end.
Help please!!! I am so close to getting my machine working and just cant fix this issue!!!
Andy
I can control my CNC Mill using Mach3 but have skipping steps and speed changes on all axis motors at random times and places.
I have:
Windows7 32bit
parallel port on motherboard, set to EPP
parallel optical breakout board
3x 2M542-N Stepper Drivers
3x Nema 23 Motors
I have already proved there is no wiring problems or noise(see below), and the problem happens even when the motors are disconnected from the CNC machine so it cant be missalignment of the machine or rough spots etc.
I made a little circuit using NE555 timer to control the motors via the 2M542-N motor drivers, bypassing the PC. There was no skipping steps or speed issues at all.
Therefore I can only assume the problem is somewhere at the PC end.
Help please!!! I am so close to getting my machine working and just cant fix this issue!!!
Andy