Torque / Speed curves for different Spindle Types

Quote:

Originally Posted by andy_con

yeah i regulary use a 20mm end mill just to get lots of meterial away at once then switch to a smaller cutter for final finish. i had a massive problem with my sem motor, smoke the lot. the rpm keep jumping up and down by like 500rpm when running. ive installed sinplde feedback into mach.

so i recently sent the motor away for repair, cost me £500 but it has been working very good since the repair. the brushes on mine looked fine but there was clealy another issue.

mine is bt35

8k with some decent torque would be ace. things like this pop up on ebay regulary, but its trying to find out the exact spec of the motor thats the difficult part -

http://www.ebay.co.uk/itm/Parker-Aut...#ht_881wt_1395

ive also been working on a 10 station atc for my triac, it currently only has a 6 station

Mmmm, found my own thread with google. So, my motor is giving problems. Would you by any chance have any spare brushes? Who did your repair for the motor?