Warco GH1224 Wiring Diagram

Hi, Hoping someone has access to the wiring diagram for the Warco GH 1224 Lathe,

Pressed the start and it went POP and the breaker tripped out, No magic smoke escaped so I am assuming for now anyway that it has suffered a dead short somewhere

And like all owners I have the lathe up against the wall so now tonight I have to lift it clear to get access to the control box at the rear

Luckily I have an engine hoist and chain blocks so it shouldn't be the end of the world to move it out

I am sure it will be obvious once I gain entry to the electrics but thought it might safe a little time if I can look at the circuit first

Thanks

Trevor

If you have the operators manual, there should be a wiring diagram towards the back.

If not, try contacting Warco. They will probably E mail one to you, and provide help on your problem.

Howard

Morning Howard, Yes I had the manual but it has gotten misplaced in the mists of time hence the request

I will try warco and see

thanks

Judging from pictures only, the Warco 1224 bears a distinctresemblance to the Grizzly G4002 lathe. If you have no luck with Warco have a look at this, taken from the Grizzly manual. (Obviously there are differences linked to the U.S. 110V supply and there is also a manual for models produced prior to 03/14.)

John

Thanks John, its better than nothing

So first stop check the mains fuse, the rest is quite straight forward to follow

cheers

trevor

So first Thanks to those who helped

once I had pulled the lathe clear and gained access it was the main QF1 breaker that had tripped

I disconnected the motor and checked but it was fine

Checked for loose connection - none

Checked the loads being pulled - all fine

checked mechanically - all fine and free

so its a mystery for now

I reset the breaker and put the lathe back together and its running fine

but what worries me is that it tripped for a reason and that reason has not gone away or fixed its self so it will be back.

Trevor

It’s difficult and time consuming to find a fault that may not even exist so I reset and then see where we are, I have come undone on occasions, the breaker suppling an 11kW drive had tripped so I reset, the bang was deafening and it did clean the dust off the fan, we now knew that we were definitely replacing the drive so much time was saved and when you lose a car for every 55 seconds that you are down then time saved is important. Breakers do not only trip because of an electrical fault, vibration and mechanical shocks can trip them. I once had a mysterious fault tripping a 250A breaker but the load was nothing anywhere near capacity, I noticed that one of the incoming phases was rather warm and as it was below the overload heaters it was enough to trip them eventually, no damage had been caused so just tightening up cured the intermittent tripping.

Mike

Hi Mike, This is the assumption I am going with that a certain set of circumstances came to align and caused the breaker to trip, the C15 breaker is more than capable of handling the in rush and I only ever have 1 piece of kit running plus some lighting both on different circuits and protected

what worried me was that it also took out my main breaker for the shed that's why I was convinced it was a dead short somewhere

oh well just have to wait to see if it returns and if so try to deal with it

trevor

deleted double post

Edited By Trevorh on 22/10/2019 10:25:28

If it actually went ‘pop’, there was certainly something awry. Something, I would suggest, momentarily made contact with an earth potential. A chafed Live wire is most likely, I would think. Either rubbed against the case or against a an adjacent neutral conductor.. The other ’non-electrical’ fault might have been an evaporated spider or such-like?

Hi NDIY looking around it could very well have been a spider touching where it shouldn't

I checked all of the wires for scorch marks - not easily done in such a small control cabinet but as I say all of the wires/cables checked out fine and looked ok

Hope the spider enjoyed the tingle before it went pop - serves the little bugger right

trevor

Failure of a suppressor capacitor would explain the symptoms. The poor things are connected directly from Line to Neutral and from Line and Neutral to Earth. Although specially rated for this purpose (X and Y), they do go pop.

They fail by causing a short circuit, but it's only temporary because the capacitor's innards vaporise like a blown fuse. The brief short is plenty enough to cause a trip, but because capacitors usually die open-circuit everything appears normal when power is reapplied.

The purpose of the capacitors is to stop any Radio Frequency excrement produced by the machine being broadcast via the mains wiring. They stop the machine blotting out radio, tv and communications services.

It's a good theory, except John Haines' Hinkley's Grizzly Diagram doesn't show any suppression capacitors! Possibly there are some in the Control Panel circuitry.

Dave

Edit, silly mistake corrected thanks to John Hinkley!

Edited By SillyOldDuffer on 22/10/2019 11:24:53

Dave,

Don't blame John Haines. That was my contribution in response to Trevor's original request as.nobody had come up with a diagram specifically for his machine.

John Hinkley

When opening the back cover I did find this photo which shows the schematic is slightly different in that I have a couple of breakers and not a fuse or contactor

But by putting the schematic that john posted with my schematic it made it easy to understand how it had been wired

so a very useful piece of information

trevor

Also I couldn't see any form of suppression on any of the contactors, I have uploaded photo's of the insides in an album,

unfortunately they have ended up upside down and I can't rotate them

either way as usual this forum came up trumps

trevor