Mesh below the slats...
Bit busy up that end of the shop
Stuck the monitor on the wall, seemed a good place, still working on the keyboard and mouse/trackball, might be a slide-out under the front of the table. I couldn't fit the PC into the main cabinet - not enough space
One odd thing I noticed when motion testing with the proper PC, the X & Z axis worked perfectly but the Y & A needed the "step active low" setting reversing in ports & pins? They sounded very rough and notchy when set the same as the other axes.
This seemed odd as all drives are the same, wired the same and connected to the same BOB????
Any ideas why I need to run two axes reversed signal level???
If none of the above then could just have been set different at the factory,?
"Active Low" means the drivers are wired with common +5V and step pulse inputs wired to the minus terminals, right?
Last edited by Davek0974; 10-09-2015 at 06:12 PM.
Just thought of another difference, the CandCNC MP3000 DTHC uses three parallel cables - one from the pc to the controller and then one to the motor drive BOB and another to the I/O BOB, these last two are new, shorter cables.
Might be worth swapping the old long cables back in???
Don't think cable length is the cause. Anyway I see only one BOB on the photo and presumed you use Mach3.
Actually did you test all drivers set to "active low"? As far as I understand you have Y and A coupled as master and slave. Wrong polarity might make them "rough" as they need to move in sync while the others may also need low trigger but do not show rough movement because they are single. ??Hmm.
The mp3000 has two BOB's one for motor control and one for inputs and outputs, yes i am running mach3
All drives were running active low on the test pc, Y and A are slaved in mach and each on their own output.
CandCNC advised me to up the pulse width to 5us and that seems to have sorted it out, all drives now running the same way.
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