My thinking is that I need an encoder to use the "closed loop vector" option and the reason to use that option is to get full torque at speeds down to 100 rpm. There may be a way to get the missing torque with open loop but I haven't pushed the right buttons (that is set parameters...)Muzzer wrote: ↑Wed Apr 21, 2021 4:39 pm Perhaps you should ask yourself under what circumstances you believe the spindle speed needs to be deadly accurate? You are talking about achieving a recommended surface speed at the cutter somewhere in a range of 2 or 3 to 1. Many VFDs can be set up to compensate for slip frequency so that the spindle barely slows under load - if you continue to believe that's critical.
The question I have asked is "do I need to run the spindle in reverse...?" The only reason I can think of is for rigid tapping... when you say deadly accurate I'm assuming you're talking speed.
This week I will do whatever I can to improve the spindle torque as I anxiously await Acorns and DMMs and a new computer...