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General Mach Discussion / Thumping motors.....
« on: March 09, 2013, 01:37:57 PM »
I bought a complete Taig system to get into CNC. I have a manual mill and lathe, but wanted to have a system that I could get up and running easily. HA! I had three out of 4 motors running within an hour of opening the boxes.....BUT: I would jog them and they would thump if the pulse rate was, say 40%, at 100%, they would still thump, but would die. And, the A axis wouldn't jog at all. To make a long story shorter.....talked to the place I got it from--thought it was a pulse problem with the computer (Pentium 4 2.8, 2gb RAM, video card with 128mb)--nothing else on the computer. Tried the optimizing recs--ended up with no pulse at all. Did a system restore, got everything moving again (but still with thumps at slow speed, stalled motors at higher speeds). Pulled another computer into the pic--duo core 3 GHz pentium with 4 gb ram, graphics video card, running, wait for it....Windows 7. Thought I was in the clear, smooth motion, A axis working fine. It ran WAY BETTER--but eventually while running air cuts, my z axis would lose steps and stop moving.
Next, bought a 2nd parallel port PCI card--installed it in the Pentium 4, disabled the onboard printer port--got the same results---thump, thump thump--all motors, (except still no A) jog fast, the motor quits. Tried the optimization--everything is off, usb, sound. When I switch it to standard PC from ACPI, it loses its pulse. I reinstalled mach and the the driver. Still no pulse. This is running off the extra PP running it as lpt1.
My options:
1. put windows XP on the duo core--would rather not--has 3 drives in it-would rather not have it in the garage.
2. get my pulse back on the P4--any suggestions?
3. get an ESS--would rather not--with my luck, can't imagine it would be a simple solution.
I'm hoping there is a simple rookie mistake here.....someone want to point towards the forest? All I can see is trees.
Thank you in advance for any help.
AJ
Next, bought a 2nd parallel port PCI card--installed it in the Pentium 4, disabled the onboard printer port--got the same results---thump, thump thump--all motors, (except still no A) jog fast, the motor quits. Tried the optimization--everything is off, usb, sound. When I switch it to standard PC from ACPI, it loses its pulse. I reinstalled mach and the the driver. Still no pulse. This is running off the extra PP running it as lpt1.
My options:
1. put windows XP on the duo core--would rather not--has 3 drives in it-would rather not have it in the garage.
2. get my pulse back on the P4--any suggestions?
3. get an ESS--would rather not--with my luck, can't imagine it would be a simple solution.
I'm hoping there is a simple rookie mistake here.....someone want to point towards the forest? All I can see is trees.
Thank you in advance for any help.
AJ