Originally Posted by
butchery
Yeah going off of the numbers I have, I arrived at ~46a, and I'm taking their numbers with a grain of salt so I assumed 50a+. Like I said, the real plan is to run it from a 3ph VFD instead, which will be happening soon, just not sure if 'soon' is '1 month' or '16 months'.
It's a 18,000rpm high speed type. Originally ordered a lot of 220v/240v gear (few dozen different things) and also a 380v 3Ph spindle/VFD, the supplier was having stock issues and wanted to replace some things with equivalent parts from different manufacturers, at one point they asked about sending 110v stuff for some of the other gear and I said we need things in the 220-240 range, and I guess they applied that to the spindle as well, and sent a 220v spindle/VFD instead of the 380v. Nobody took a good look at it when we took delivery, and it sat in the shop for 12 months while we worked through the other stuff in the order.
It's been long enough, and shipping is bad enough right now, that it's probably not worth trying to go back and argue so it is what it is. Been looking at local VFD options and the real annoyance is the 220v spindle has a nameplate current of 26a, most equivalents here are ~400v and 15a, so most brand name VFDs here in that power range max at 19a, so might need to oversize the replacement VFD? Talking to local suppliers, it's turning into a can of worms all on its own as even the drives at 11kw normal duty are <26a, and the next step up from the local supplier overshoots what I expect our 3ph supply will be.
Was sort of hoping to just push the problem down the line until the shop is relocated, even if we could run it at low loads at 20% or 30% of its advertised power or torque, it'd be usable for something else, until the power is properly sorted. Sounds like thats not an option, which is a bit of a bummer but I sort of expected it haha.