I need some advice here, please. I have a 2.2kw water-cooled Huanyang Spindle with a Huanyang VFD GT that keeps giving me an “OC3” error.
Some background - My original HY VFD went up in smoke one day and I ordered a new one, but got sent the GT instead of the HY series. Setting it up is not that much different and I got that running easy enough.
The OC3 issue only started about a week ago. I am surfacing a slab with a 60mm (2 3/8") surfacing bit, doing passes less than 1mm (1/16") deep at 90 Inches/min and 30% stepover. So not pushing it hard at all IMO.
Anyway, everything runs fine for a couple of min and then the VFD shuts down the spindle with the OC3 error. (Seems to happen randomly, but always when the bit is in contact with the surface, if that makes sense.)
I have been in contact with Huanyang support and they have been good in getting back to me with options and settings to try, but Im still not getting anywhere despite resetting everything to factory defaults about 7 times now.
I don’t think it has anything to do with the actual settings (IMO), so I was just wondering if anyone else had similar issues and how you might have solved it?
At this stage, I would be happy if they just refund me (probably not!) and start looking at other VFD options or brands if anyone can recommend anything in particular?
BTW, I don’t think EMI is an issue either. I have tried several configurations even without any dust collection and hoses close by - same outcome.
Update - Sent PWNCNC a message on this issue asking about their VFD and Clinton sent me this reply. Really appreciate how quick they are to reply and the detailed answers they give.
"Josh, this is where things get weird as far as warranty issues and troubleshooting/support in general. We will 100% sell you a VFD. However if you hook up your current spindle cable and spindle motor onto our VFD then there is a very high probability of you getting the same error. Over voltage is rarely caused by the VFD. It could be broken wiring strands in one of your three “U, V or W” lines in the spindle cable. This will cause more voltage to flow through two of the three hot lines going into the spindle motor. The VFD can detect this and will through the error. If it’s not that it could be (much less likely but possible) spindle motor itself. Same issue one of the three hot lines not feeding the proper voltage. This will generally through the error upon startup but be ok once the spindle gets up to speed. Over current/over voltage is a nightmare to track down because you really have no alternatives other than throwing money at it. Personally I’d either buy a complete spindle kit or replace the spindle cable and see if that fixes your issue. I’d almost guarantee it’s the cable or motor. Which one… flip a coin. I just recommend replacing the spindle cable because it’s cheaper.
On a side note… sorry your dealing with this. This particular problem is one of if not the most frustrating problem to try and troubleshoot.
Hi Josh – I just went through this as well but with a PWN 1.5kw spindle. It would randomly error out due to over current (according to the error code).
In the end, I slowed things down way below what I would normally run with my Makita and was able to finish the milling. A job that should take less than 45 mins was now taking 1.5hours – which means I’m losing money on the deal.
Aside from being super frustrated, ruining 3 work pieces, and breaking a bit, I’m very annoyed the spindle doesn’t preform nearly as well as the router given the 6x cost increase.
When I asked around, I got shoulder shrugs and “slow down” answers - even more frustrating.
In the end, I threw money at the problem and purchased a new redline. I hope it arrives ‘soon’.
Sorry I can’t be more help other than empathizing with you.
I hear you on that one. I just finished a job for a customer in 2 days that should have taken me about half a day otherwise. Very frustrating!
At least Huanyang have been good so far giving me all sorts of possible solutions and things to try and solve this. Last night I had to test the output voltage to the spindle while running at 50Hz and the readings were all over the place, nothing constant which indicates (as far as I can tell) that the VFD is faulty.
So now it’s just wait and see how they want to solve this. I will be asking for a refund and probably get a new VFD from PWNCNC. I am a bit over the Huanyang even though most people seem to be doing just fine with this brand. I simply cant afford the downtime anymore.
Luckily I do have the trusty old Makita still handy, even though it is almost frustratingly slow once you get use to running a spindle.
