AM882 strange sensorless stall detection issue

[Gotty101]

Hi Ben,

Thanks for the message. i will try and help as best i can, although JazzCNC is very much a guru on here and he knows his stuff and has far more real experience.
If you can make your drives move in pro tune thats a good sign, so its unlikely you got any bum drives from China.

One setting i had trouble with is the active high active low setting. On my cnc i control the enable signal so if the enable contacts are being fed 5v then i wanted the drives to be enabled, i found the description next to the checkbox in pro tune unclear/badly worded. But all in all if your drive is ready to go, and is enabled the red led will be off and the green power led will be flashing. Are your drives like this?

Also in protune once you have made the changes you wish to keep do remember to use the write to eprom button, otherwise when the power is cycled it will forget your new settings.

next basic thing to check is your wiring between your bob and drive, make sure your only feeding 5v into the dir and step pins on the drives (they are optoisolators, and your just lighting the led inside it so dont feed more unless you have used the correct current limiting resistor).

[Mammoth 01]

Hi Gotty,

Yes It is all set up that way. I have installed +5v to Dir= and Pul+. I am not using the enable or Alm but wondering if I have to run a +5 V to the enable. The drive shows no errors and is blinking green ready to go. Like I was saying its weird I can run the motor from the Pro Tune pulser but not my Mach3. I know that the box in pro tune Dir DEF has some play in this. I believe that I have it selected low. I have wrote the eepromp as well. I will try to reset the drive in Pro tune and put all the switches in the default next, and re set up the pro tune. I have tried so many different combinations its driving me nuts.

Thanks

[Mammoth 01]

A corretion in my typing that was DIR+

[Gotty101]

If the green light is flashing then its good to go and you dont need to worry about the alarm and enable for now.

One clear difference running from mach and pro tune, is pro tune is going direct into the drive where as mach is going via the bob. From your description, your feeding +5 to step and dir pins on the drive and im guessing the step and dir - pins go into your bob? Are you sure the bob is wired right? ie is the dir - ment to be wired into the bob, meaning its syncing and not sourcing?

Regards

Trev