The 2DM860H chinese controllers vs the rest?

[Doddy]

Real world experience. Tonight I burnt out a stepper (my fault, overdriven on current setting). In doing so it took out the 2DM860H.

Not only on a Sunday, but a Sunday in the middle of a global pandemic.

Got a couple of spare steppers (higher rated) and I can slave the A-Axis controller, but PITA all the same.

[JAZZCNC]

Real world experience. Tonight I burnt out a stepper (my fault, overdriven on current setting). In doing so it took out the 2DM860H.

Not only on a Sunday, but a Sunday in the middle of a global pandemic.

Got a couple of spare steppers (higher rated) and I can slave the A-Axis controller, but PITA all the same.

The conspiracy theorists and trumps of this world would say the Chinese did that on purpose.. . . . . Me you just been bloody unlucky mate because it takes a lot to burn out stepper in my experience.

[Doddy]

The conspiracy theorists and trumps of this world would say the Chinese did that on purpose.. . . . . Me you just been bloody unlucky mate because it takes a lot to burn out stepper in my experience.

Unlucky?, no, just stupid. I've slaved (via changeover relay) two machines off one set of drivers (with an switching interlock to protect the drivers from disconnection) to save on space and cost. But in doing so I'm driving 40 year old 2.1A steppers at rather higher than they're designed for, so, in honesty, it was waiting to happen. Interestingly the B coil shorted and destroyed the driver - to the point that, from what I can tell, the whole logic is fried - I could understand the power output being destroyed, but to have no LED fault indication was a surprise. But, live and learn - my replacement steppers are rated higher (I'd already replaced the X-axis for more torque) - so all is good. It's just a buggeration to strip the controller down to replace the driver - might wait for a replacement rather than physically moving the A-Axis (depends if I can remember if I tapped the plate that they are mounted to - easy to swap, versus bolted-through in which case have to strip the mount plate out.