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General Mach Discussion / Stepper iregular or stalling in MDI or program run
« on: December 21, 2006, 10:07:57 PM »
Hello all,
I’m new to Mach3 and stepper motors and I have run into what I think is a small problem so I’m hoping you can help me. I have checked the forum before I posted to make sure I wasn’t repeating anyone’s problems My set up is as follows mach3 version 2.0.017 and its licensed, Xylotex 4 axis stepper board running the 425oz steppers (2 in master/slave on X /A and a normal Y and Z configuration. The power supply is also from Xylotex The pc is running XP professional SP2 its an older machine but its only running mach3. The machine itself is immaterial at the moment as this happens without lead screws connected.
Now the problem I can run at any speed I want in jog (within reason) however in MDI or program mode the axis moves about an inch then steps irregular and sometimes stalls. If the lead screws are connected at a slow speed then the distance traveled is correct so the set up of the pitch is correct with the irregular stepper movement even (if I go above 10ipm the motor seems to stall).
I’m thinking one of three things the power supply doesn’t have the correct current available however the use of jog speeds unto 31 ipm seems to negate that. It could be dropped pulses from the interface I placed a second parallel port in and experienced the same thing. Or last it could be my pc.
I have ordered a break out box from mini i/o products to possibly eliminate the parallel port issues that should be here soon.
The other thing I have noticed is that in lazy cam if I use line numbering the program has double line numbers every 40 lines or so (ie N120 N125 X22.56 Y 12.0) it only requires a re-edit but I wondered if any one else had encountered it, also if I import a DFX i lose part of the Acad or TurboCAD drawing if I import as a HPGL from the same program its fine.
Any help or direction you can give me would be appreciated. Just so you know I’m not a total CNC idiot I have worked for a CNC controls manufacturer for 20 years and know CNC’s and servo drives quite well but not steppers as we / I have never use them.
This is purely for a home router project and for hobby use. Thanks in advance
Mark Haydock
I’m new to Mach3 and stepper motors and I have run into what I think is a small problem so I’m hoping you can help me. I have checked the forum before I posted to make sure I wasn’t repeating anyone’s problems My set up is as follows mach3 version 2.0.017 and its licensed, Xylotex 4 axis stepper board running the 425oz steppers (2 in master/slave on X /A and a normal Y and Z configuration. The power supply is also from Xylotex The pc is running XP professional SP2 its an older machine but its only running mach3. The machine itself is immaterial at the moment as this happens without lead screws connected.
Now the problem I can run at any speed I want in jog (within reason) however in MDI or program mode the axis moves about an inch then steps irregular and sometimes stalls. If the lead screws are connected at a slow speed then the distance traveled is correct so the set up of the pitch is correct with the irregular stepper movement even (if I go above 10ipm the motor seems to stall).
I’m thinking one of three things the power supply doesn’t have the correct current available however the use of jog speeds unto 31 ipm seems to negate that. It could be dropped pulses from the interface I placed a second parallel port in and experienced the same thing. Or last it could be my pc.
I have ordered a break out box from mini i/o products to possibly eliminate the parallel port issues that should be here soon.
The other thing I have noticed is that in lazy cam if I use line numbering the program has double line numbers every 40 lines or so (ie N120 N125 X22.56 Y 12.0) it only requires a re-edit but I wondered if any one else had encountered it, also if I import a DFX i lose part of the Acad or TurboCAD drawing if I import as a HPGL from the same program its fine.
Any help or direction you can give me would be appreciated. Just so you know I’m not a total CNC idiot I have worked for a CNC controls manufacturer for 20 years and know CNC’s and servo drives quite well but not steppers as we / I have never use them.
This is purely for a home router project and for hobby use. Thanks in advance
Mark Haydock