Messages

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General Mach Discussion / An answer to my motor stalling problem when reversing

« on: July 17, 2011, 11:14:15 PM »

 I found that it was my backlash enabled causing my stalling problem when ERP listed several things as did others. When I disabled backlash, it started working fine. I found that I needed the backlash to make my machine accurate but couldnt make the stalling when reversed quit. Then I found an article that answered my problem. I dont know the guys name, but he had the same problem and recommended setting the shuttle speed from 1 to .500.  I did and it worked. I ended setting it at .250 and it works great. I had no idea that this had anything to do with backlash settings.  I hope this helps  someone else with backlash problems. This setting is found under general configuration. Again, thanks to all who replied. What a great forum Thanks,  Vincent
 

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General Mach Discussion / Re: when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 08, 2011, 05:19:33 PM »

Yeaaaah. ERP got it. I had the backlash set wrong. When i disabled it, it worked great. Now I can start setting my machine up correctly with limit switches etc. Guys, thanks for all who replied. You know, it makes you feel stupid to find such an easy fix but I guess thats how it is when you dont know. Again, thanks,    Vincent

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General Mach Discussion / Re: when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 07, 2011, 07:31:21 PM »

Erp asked if the readouts reflect the slow down and speeding up and the answer is yes they do follow the speed changes.  Vincent

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General Mach Discussion / Re: when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 07, 2011, 06:14:04 PM »

Wow, I'm impressed. Thanks every one of you for taking the time to answer.. I tried the 16 acc. but same thing. I ran a small g code program and it worked until it made a different direction then the stall thing and then up to speed again even tho it was running at about 7 imp. The power supply is 28 volts and steady. I think the amps are around 8. The motors say Deepgroove 3.3 v,2.8 amp, 1.8 deg. , 280 oz. I will have to learn how to video with my Iphone to post a picture of what its doing. I am set at 25000,50, and 8. It runs very smooth and fast if you leave it in the direction it was running in last. No stalls or anything. If you go the opposite direction, stalls down and then starts back up to speed and will run all day in that direction with no stalls after stopping no matter how many stops and starts until reversed, then same old. I'm not trying to keep saying the same thing over and over, I just dont know how else to explain whats happening. I'm beginning to think I may have a computer problem. I noticed that when I click on something its slow to react. Maybe thats whats going on. Thanks again guys. Its appreciated.  Vincent

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General Mach Discussion / Re: when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 06, 2011, 07:45:44 PM »

Hi Rich and Tweakie. Thanks for answering. I tried the things you said but no help.Right now I'm set at 25000,50 & 5. When I push left or right arrows, it gets to speed in one direction and runs very fast and smooth as long as I go that same direction whether I stop 1 time or ten times with no hesitation on x or y axis. But if I reverse direction, it winds down to a stop and slowly comes back up to speed. If I keep going that direction no problems at all until I reverse again then the same thing again. I'm still at a loss.

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General Mach Discussion / when motors reverse, they stall then slowly pick up speed. HELP!

« on: July 05, 2011, 10:17:06 PM »

Hi guys, I'm a newbee. Bought a taig cnc from Deepgroove a few years back with xylotex 4 axis board and never could get the motors stepping right and finally gave up and didn't touch it till now. I'm going to try again hopefully with help from the forum so I can use this thing. I have 280 oz, 1.8 deg. 2.7amp motors with a 24 volt 8 amp power supply. I have tried every kernel on Mach 3 but was never able to get them to run right. I have checked the voltage settings on all the axis's and they are set at 3.3 volts no motor attached. The power supply has 24 volts and doesn't drop when the motors turn. The motors will get up to speed and be very smooth if you keep going the same direction but if you  reverse directions, the motors stall and slowly get up to speed. If you keep going the same direction its great but if reversed, same thing again. I'm lost. It seems like some kind of pulse thing but I just don"t know. The z axis  doesnt do this. Only the y and z. Any help is appreciated.  Thanks, Steelman

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Mach4 General Discussion / Re: New people welcome !! Come in here and introduce your self!

« on: July 05, 2011, 09:57:30 PM »

 Hi there everyone. I'm an old newbee from Louisiana but new to cnc. Name of steelman, not because I know a lot about steel but because I play steel guitar. Sure seems like a great forum with really talented people. Glad to be a part of it and hope I can learn something from you guys.  Vincent(real name)