Chirping Grizzly G0619 mill?

[Spookydad]

My Grizzly G0619 (SX3) mill suddenly stopped in the middle of a cut. I didn't crash the cutter into anything and it wasn't a heavy cut.

I hit the e-stop and shut off the mill entirely. When I turned it back on, the power light is on, the tach lights up but doesn't show anything, the tapping light flashes intermittently and it is making a chirping noise. The spindle won't start at all. I tried unplugging it and leaving it for a while in case it was overheated. I tried jumping a wire across the slow blow fuse. I can't get to the lower access panel without moving the mill, so I am hoping for some help before I do so.

I was using a 3/8 HSS cutter in a piece of hot rolled bar. I was cutting the side of a slot but the cut was only around 0.015" deep and this was the second pass on the slot so it was very shallow. I was using maybe 20% of the width of the cutter. The RPMs were around 1200. I was trying to get a handle on controlling the backlash by watching the DRO and making slight adjustments to the hand wheel as I cut. The feed was quite slow as I was backing up and going forward to try to keep the DRO on track.

Any thoughts?

Neil

[toolmaker76]

My first thought is there a safety somewhere that has been triggered? Cover worked its way ajar, with a safety switch that stopped the spindle? Don't know if the mill is that sophisticated, mine sure isn't but yours looks more sophisticated than mine.

Another thought, hard to tell with a quick look at the grizzly site how it is driven, wonder if a belt has slipped, or if the motor tension has come loose.

I have had the motor work its way loose, then all the pressure is off the spindle. Spindle will either slip (stopping in a cut) or quit turning when that happens, I have also had things loosen enough for the belt to chirp.

Hope this helps.

[sasquatch]

Could be a fuse???

[Blackadder]

have you checked the safety guard has not vibrated open a touch?


Stuart

[macona]

Sounds like the motor drive is toast. Chirping is a good description of a overload fault on a switching power supply. Since the mill has a brushless motor it probably either has a switcher to power the drive section or integrated with it. If it is not under warranty check the main power transistors for shorts.

[Spookydad]

A replacement motor controller board arrived yesterday and solved the problem.

Grizzly's customer service has saved the day.

Neil