Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Benizakura on February 21, 2016, 03:49:08 PM
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Hi Everyone !
I am in need of help big time! My CNC wont move the axes the way it is supposed too. http://abcnc.de/shop/en/detail/index/sArticle/234/sCategory/6
When I use the software that came with my CNC, the axes moves exellent. But their sofftware can only wotk with HPGL, not Gcode. But when I jog the axes in Mach3, the stepper motors just rotate too slow and unaccurate.
What am I missing? I have been researching for 3 days now and I cant figure out what the problem is !
Here is a link to a video, where I am jogging the X-axis. https://www.youtube.com/watch?v=UJtbc8W2dXo&feature=youtu.be
PLEASE help me.
Regards, Beni.
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You have steps per set at 66 in motor tuning page? How many steps per rev does your stepper motors do? Normally steppers do 200 per rev.
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Hi Bfgstew.
Ya, my stepper does 200 step on a rev, but mach3 only wanna know how many steps it takes for 1 mm. And since my axes have 3 mm pitch, i figured that 200/3 =66,6.
My real problem is how the motor 'ticks' when it rotates.
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How have connected cnc to pc?
what pc software are you running?
looks like pc and cnc not talking to each other properly.
more info you give better chance of fixing.
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My Pc is connected to the CNC via a Parallel Port (LPT).
The PC is an AMD Athlon 1,6 Ghz , 1,25 gb ram, OS windows XP.
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Hi Beni,
I am assuming that your stepper motor controller uses 'microstepping'. At this stage your settings are unknown but it is common to have 1/8th microstepping so set your x and y axes 'steps per unit' (in motor tuning) to 532.8 (66.6 x8). This should make movement less jerky so that you can then use the axis calibration feature (Settings page) to get the correct 'steps per unit' for each axis of your machine.
If necessary, increase the Velocity settings for the x and y axes (in motor tuning) to get a reasonable speed of movement (this can be fine tuned later).
Tweakie.
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Hi Tweakie.
My controller is called a Step2600 ( http://www.digi-vision.de/download/pdf/Stepp2600.pdf ), and came with the machine.
I tried to put 532.8 in steps pr unit, and the x-axis was moving slightly better. But after using the axis calibration, which gave an 133,2 steps pr unit, the motor was back to it old ways with ''ticking'' and ''jerking''.
Could it be my controller card that is simply not made for mach3, or is it possible that the PC is to weak?
Regads, Beni.
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Increase your step pulse and dir pulse to 5 and try it, might work.
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Hi Dave.
I have tried that too, and it had no effect. I am really thinking about trying to change PC and CNC controller , because I dont see any other solutions.
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It does say it is compatible with mach3, but cant really understand it as it is in german and my german is woeful to say the least.
i would double check your settings in your controller and mach3, failing that purchase a standard breakout board and try that?
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Hi Beni,
I think you have given this it's best shot.
From your first picture the driver test results indicate that your PC (fine with your existing controller) will not work successfully with Mach3. If you can obtain another PC, with parallel port (or with PCI slot to fit a parallel port card), to try then this may be the way forward.
Your Step2600 controller uses 1/2 step microstepping which may never give truly smooth movement, at least not as smooth as 1/8th microstepping so at some time in the future you may also wish to consider a new controller.
Tweakie.
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I would suggest that you FIRST clean up your PC. I would reformat teh Drive and reinstall XP then MACH3 and nothing else.
THEN retest your machine. I think you may find it will be fine then.
(;-) TP
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Hi everybody !
I tryed to install LinuxCNC, and now my stepper motors are moving as supposed.
I want to thank you all for your great support, and best of luck for all of you.
This thread can be closed now.
Regards, Beni.
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Sounds like an excellent result Beni - good fortune with linuxCNC.
Tweakie.