Droping Steps, closed loop ? HELP !!!

[bobin]

hi they are in fact an old superior electric (slo-syn)round style motor ,have been running them at at voltage of 25...will lift it to 32v......but dont want to push the rout-out boards too far,blown one set up,,,(replaced mosfets..and working again)
I tried running mill at 25mm per min in aluminum and in a 18mm pocket it drops about 25 thou off the size all round(very little slog on lead screws and compensated for on mack 3) as you say may have to go for bigger motors(brother and i built a big bridgeport using plug and play {low cost rerofit} servo system,not a cheap solution,but it is spot
on with no droped steps ....but cost an arm and a leg for hobby machine...thanks for the reply bobin