Stuart Firth
Fair enough – I too have had an issue with a motor ‘not liking’ feedback (Sorry Mr. Ridgway). This also is not a coreless motor, but one of the chunky 16mm square cans with a 6 pole armature that you can buy cheaply from ebay. On feedback it hunts and surges, but it’s great on pure DC and PWM controllers. I just give up and use a different controller with it. I have tried putting a grain of wheat bulb across the motor terminals, which can do the trick with coreless motors, but it didn’t improve. Might be worth a try with yours though.