Temperamental spindle

[mark84]

Hi,
a few years ago JazzCNC built me a router, however this last year I've had a reoccurring issue- the spindle either stops after a few mins, or more typically just doesn't start, the VFD has no reaction to mach3, even hammering the spindle button on mach3 has rarely worked.
Normally it's just a minor niggle - I leave it for switched off an hour and it magically works again (any less than an hour and it doesn't!?) but today it did 4 mins work and then decided no more, and the VFD hasn't reacted to mach3 since.
I've tried2 PC's, and changed the Ethernet cable, but neither has made a difference.
I'm not too technically minded, but maybe someone can help (Dean??)- I have taken a pic of the VFD, I've no idea why!
All I can tell you is the taped off wire is because the water pump was playing up a while ago and so I disconnected it- it's not made much difference as I haven't run any long toolpaths since, and it's sadly not corrected the issue!
Cheers for any thoughts, it's been a stressful day!
Mark

[Clive S]

OK Mark Have you tried shorting the FOR (green/yellow wire) and the DCM (black wire) terminals together.

Remove them from the terminal block and link the two terminals. the motor then should run. That will prove if the relay on the bob is faulty

[mark84]

OK Mark Have you tried shorting the FOR (green/yellow wire) and the DCM (black wire) terminals together.

Remove them from the terminal block and link the two terminals. the motor then should run. That will prove if the relay on the bob is faulty

Clive, thanks so much for the detailed reply. I tried what you said, the vfd tried to accelerate up presumably too fast and makes the distinct click of a circuit breaker or similar, presumably because it misses the speed, however, as I power it down and a second click is heard as the vfd releases the spindle very briefly spins. I'm not sure where to go from here.
Thanks again for the reply Clive, it's much appreciated

[Clive S]

Clive, thanks so much for the detailed reply. I tried what you said, the vfd tried to accelerate up presumably too fast and makes the distinct click of a circuit breaker or similar, presumably because it misses the speed, however, as I power it down and a second click is heard as the vfd releases the spindle very briefly spins. I'm not sure where to go from here.
Thanks again for the reply Clive, it's much appreciated

So if I understand what you are saying. With the FOR and DCM (without the original wires connected) the spindle powered up, If then you remove the link the spindle should stop. If that is the case then check the original cables from the FOR and DCM back to the BOB and makes sure the connections are secure. A picture of the bob might help

[mark84]

So if I understand what you are saying. With the FOR and DCM (without the original wires connected) the spindle powered up, If then you remove the link the spindle should stop. If that is the case then check the original cables from the FOR and DCM back to the BOB and makes sure the connections are secure. A picture of the bob might help

Hi Clive,
I can't actually locate the breakout board, I've taken a pic of the whole cabinet, if you could spot it that'd be great!! Sorry about the bother.

[Clive S]

Ok I think that the two cables that go to the vfd that control the spindle stop/start are the one's that I have put a red ring around.

Make a note of which terminals they are connected to. Then disconnect them and check them for continuity to the vfd FOR/DCM if necessary remake the connections.

I have never used that controller but I can see Dean's influence in there .