Member postings for John Rudd

John Fletcher, pm sent...please.

I asked him "what work exactly has been done to this compressor as it is described as 'seller refurbished', did you use any spares?" (potential for mis-selling, not as described)

It wouldn't surprise me if it didn't sell....

Just got a reply on the instructions...£20....Greedy!!

Edited By John Rudd on 15/03/2021 15:41:10

There is an error....

The default M display is 0 not 1 as written...showing spindle speed.

Hope this of use....

Running in reverse with a lower speed is by design on these machines....

Cheers Ian....

Just about sorted it now..

Ian,

I've sent you a pm...

Ian,

Thats a great help...

Should be able to get the machine running as it should now......👍

Thanks.

Ian,

Thanks thats great....Just what I needed.

Do you have any idea on how the buttons work?

I think the green M button switches the motor on, the Red one, off. The two either side cause a change in direction, but what about the + or - buttons...?

Any help appreciated...

I have one of the earlier Warco mini lathes that has the digital speed readout panel whereby the speed is set via touch buttons rather than a speed control potentiometer....

It looks like the machine has been tampered with in the past...

So before I start pestering Warco, if there are any owners of a similar machine, could they tell me where is the little speed pick up board secured inside the end housing where the change gears reside?

I can see the slotted disc, but there's nowhere for the opto coupler device to be secured....I cant see how it attaches...

A photo would be a great help...

Many thanks

J.

Edited By John Rudd on 25/02/2021 15:56:30

Ken,

You have a private message, refer to the top of the page a flashing envelope,

Have a look at the manual for the G0704....

https://cdn0.grizzly.com/manuals/g0704_m.pdf Page 45 shows the wiring for the KEDA ZH-A 3 position rotary switch....

In the last foto, you highlighted a Blue wire that, to me, looks like it goes to the A- connection on the speed control board. That being the case the wire needs to be connected to the FWD/REV switch...You will need to trace the motor wires back to the switch and try and determine which connection it is on the switch....

Thats the best I can tell you for now.....A better look at the switch would help....but looking at the G0704 wiring it looks like it could be terminal 5 on the switch

The PM25 machine referred to above is a brushless motored version....a different beast altogether...

Edited By John Rudd on 02/02/2021 19:40:21

The motor is a cap start cap run type, hence the blue black cylinder things...

As for motor removal, I'm sure this has been covered elsewhere on the forum...

https://www.model-engineer.co.uk/forums/postings.asp?th=164598

Edited By John Rudd on 31/01/2021 14:07:55

The purpose of the 100k resistor isnt clear...Its value is too high and its rating too low to be of any useful purpose.

I generally replace the 15K carbon unit with a 5 Watt ceramic wirewound type for a lasting repair...(I've told all my secrets now...)

As I understand it, the purpose of the shunt(s) is (are) to aid regulation of the transformer in either current or voltage......

Edited.....self moderated....🤔

Edited By John Rudd on 24/01/2021 16:08:25

Glyn,

That is just what is needed, many thanks...

Duncan, if you can identify SQ1&2, we can go from there...I suspect they are belt cover and chip guard interlocks.

Do you have a dvm at all?

Edited By John Rudd on 21/01/2021 16:31:50

Duncan,

not sure if pm caters for pictures,

I'll pm you my email address..