[dbunyip]

How many vfd failures have there been. Mine just died after less than 6 months. Tormach is saying that they are rare to fail. I'm trying to decide if I should buy a spare

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[CadRhino]

I bet it's rare. You are the first I've heard of.

QUOTE=dbunyip;2079616]How many vfd failures have there been. Mine just died after less than 6 months. Tormach is saying that they are rare to fail. I'm trying to decide if I should buy a spare

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[Doug Darby]

Mine failed December 8th. Less than 4 months old. Heard of one other besides yours.

[coffeetek]

Mine failed too on very limited use. It does not appear they are rare to fail...

[nutzilla]

Had 2 fail on me already. Pcnc 440.

[mactec54]

With all these VFD fails I would think that this is a VFD programing problem, does anyone have a Breaking resistor, if not you most likely need it, this helps with how your spindle motor slows down, if it slows down too fast, you can easy damage the VFD Drive when you don't have a Breaking Resistor fitted

[tmarks11]

Had 2 fail on me already. Pcnc 440.

Important to be precise which machine we are talking about.

Both the 770 and 1100 have an industrial Emerson VFD, which I believe has a low failure rate.

The 440 has a BLDC motor controller. BLDC controllers have been problematic devices for a lot of small mills in the past, and I don't know where Tormach is sourcing them from. Anyone got a a picture of the device handy, maybe model name?

[dbunyip]

They defiantly changed something on my new one. It has a noticeable loss in power vs the first one.

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[tmarks11]

They defiantly changed something on my new one. It has a noticeable loss in power vs the first one.

Might just be they derated the power in the controller to avoid future burn-up. Bummer, regardless. BLDC controllers seem expensive to do right, and cheap to do wrong.

[Lasher]

I've made a little over 700 parts in the past year with my 1100 and I haven't had any issues other than a lose wire and the normal leaky stand issue.