Can your electrician check to see if the Inverter is, or is not, supplying 3-phase power. Then you would know whether the problem is with the inverter, or with the electrospindle, or possibly both. Either way, we can help with the repair -
Precision Spindle & Accessories Inc.
www.precisionspindleinc.com tel. 519 671 3911
email@example.com fax. 519