Originally Posted by
greywolftek
I guess the spindle/VFD configuration I mentioned must be an unusual one. Long story short, I'm getting more and more confused around VFD's more I read posts on this forum. I'm going back and forth with Wafer regarding spindle specs including VFD requirements and so far I'm getting nowhere. I'm looking for a peer confirmation on few details before I leave 2 grand out of my hands. I decided to modify my setup and go with 2-pole, 220V JGL-100 3.2kw 24000rpm ISO25. Simply, more VFD options. Originally I wanted 2.5KW one but apparently they don't make those anymore. I want ISO25 because it allows to use ER20 collets. I've red a lot of posts around VFD's and ATC spindles, especially jian-ken ones, the more I read about them, more I'm confused.
My CNC setup will run on 240V split-phase system. It will have 50amp circuit breaker supplying power to a new CNC electrical encosure. Software: UCCNC.
1. Anyone knows how much rated current is for 2-pole, 220V JGL-100 3.2kw 24000rpm ISO25 spindle? Jian-ken website rates it at 8.8A, mactec54 stated in one of his posts 2.2KW runs at 9.6A.
2. Another post mentioned you need at least 2HP bigger VFD then what your spindle output is when derating. So if my spindle is rated 4.3HP. that means 6.3HP and the closes to 6.3 is 7.5HP VFD. Is this correct? Do I have to go 10HP?