VFD Has defantly blown up now!

[routercnc]

Ok all up and running now and I have control from Mach 3 ( I set 001 to no.1) however if I want to bump the spindle speed up with the up arrow nothing happens. I'm assuming 002 needs to be allso changed to the same ie no.1 set by external terminals?

It's been a long time since I set mine. Away from machine so will need to check later.

On the strain relief grommet - can the cable move about independent of the spindle? If it can it really needs to give a gentle flexible support to the cable so it does not flex in the same place. Instead the cable should curve gradually to spread the stress out. Otherwise with repeated movement the cable itself may break where it exits the support bracket. You can either design a new grommet (mk3 !) with some gradual flex element as you move away from the spindle, or buy one of these:



Top right end clamps either side of the spindle end plate
Bottom left end is the spring element providing graduated support

But if it exits the spindle and goes into an energy chain (which is also supported at the spindle end) then I think you are OK as you are as this will act as the spring flex element.

[charlieuk]

The cable runs up and through the inside of my z axis And every axis has cable chain. The cable comeing from the spindle does not ever move other than vibrations, the blue tube is silicone so that should take the point load of the joint and dampen vibrations. I would have thought if I were to get a failure now it would be in the cable in the chain that is constantly moving,how long are cables expected to last? I agree if the wire was just going straight up to were ever and no chain it would need more but I'm not sure why anyone would do that.

[charlieuk]

I tried all the settings in program 002 and still don't seam to have control over the speed via Mach 3 only on and off.

Is there maybe something else as well that needs to be switched at the same time?

[Ger21]

There's a jumper on the VFD that you may need to change? See page 10 in your manual.

[Clive S]

I tried all the settings in program 002 and still don't seam to have control over the speed via Mach 3 only on and off.

Is there maybe something else as well that needs to be switched at the same time?

From the manual:-

PD001: Command source. Set to 0. 0 means you're controlling the spindle via the front panel controls. 1 means you're using controls that you've wired up to the screw terminals. 2 means you're going to control it using RS-485.

PD002: Speed control source. Set to 1. 0 means you're controlling the speed through the up and down front panel buttons. 1 means you're going to control the speed with either the knob on the front or an external potentiometer. 2 means RS-485.

When PD002 is set to 1, there is also a jumper next to the screw terminals that you have to set. If the jumper is on the right pair, the control is the front panel knob. If the jumper is on the left pair, the control is via an external potentiometer connected to the screw terminals. Make sure the jumper is on the right-side pair.

[charlieuk]

Cheers many thanks that did the trick sory if it was odvios in the manual I just really struggle with reading pages of text. Think we are all sorted now and have already got 10h on the new spindle and vfd.

I opened the old vfd up and there is a green resistor that looks like it was what got toasted. Is it likely this is the only thing that went or would have other stuff gone to, just wondering if it's worth geting looked at and repaired?

Many thanks for all the help

[Boyan Silyavski]

The VFD does not have so many things to check as you may think. Here is a link to basic testing, most of all test the rectifier. Is it worth it, who knows. A Siemens drive that had a blown part and cost me 20euros to repair was worth it, as it costs new 700euro. If problem was the rectifier it alone costs 200-300. At the same time a chinese drive costs 100 euro. At the other hand the Siemens had maximum frequency of 1000hz i believe and a cheap chinese drive has 400hz max frequency, that also may matter.