Originally Posted by
dmannock
Overall, you will find that the spindle is too powerful for the VFD and you may have problems cutting hard materials at high rpm where the motor current increases. If the fuses keep blowing I suggest you a). take lighter cuts, b). find a slightly larger amperage slow blow fuse, or c). see if your VFD has a soft start feature where the start up current is limited. What you lose in outright power will be gained in reliability when cutting. Most machines go through a dry run at the factory, but no test cut is performed. You may find that you will need a good digital MM to monitor the current, and potentially a PC based oscilloscope for more advanced diagnostics. Look on the web for these torrents if you must. There are now Apps for that. Get probes and leads with alligator clips as well online. A systematic, pedantic approach with notes saved in a WPS office (free) doc or spread sheet will help your logical approach and enable you to save initial and optimized configurations for later referral. Hope that helps you.