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Member postings for George Jervis

Here is a list of all the postings George Jervis has made in our forums. Click on a thread name to jump to the thread.

Thread: 3 phase converter help needed please
23/09/2018 20:37:38
Hi Martin,
The converter is plugged straight into the house mains via a 13amp plug and the motor is wired directly to the converter with no switches inbetween.
The original switch on the mill you may see isn't connected to anything anymore.
in my rush to get the 3 phase motor on I cut the wire to the single phase motor and and switch that was on the mill originally
George
23/09/2018 18:57:11
I'll have to try that tomorrow morning and I'll let you know what
happens, fingers crossed

Thank again everyone for trying to figure this out
George
23/09/2018 18:39:32

This is were I could have gone wrong ? Does this mean I have to have a separate on off switch?

I had a few years ago a 3 phase converter on a large drill press that I just pressed the enter button for on or off and used the arrows up and down to increase or decrease the speed but I have sold that now. I had assumed that this 3 phase converter would be the same??

George

23/09/2018 17:43:19

Hi Martin,

I've put some more pictures in a album of the wiring to the motor and converter

The wiring I've used is 1.5mm2 sc 4 core

Converter wiring as follows

U is wire 3

V = 2

W=1

E tm earth

And the motor is wired too

U1 is wire 3

V1 is 2

W1 is wire 1

Earth is E

I'll try and write what the parameters I have on the converter at the moment but this might not be on here until later or tomorrow morning.

Many thanks again for the help

George

23/09/2018 16:48:21
Hi everyone,
Thank you for the continued help I've managed to check and it's set up to 50Hz and L2A is on YES as well, but still no joy?
One of the parameters say I have 235 to 236 volts going into the converter so I have enough voltage going in.
Knowing my luck, it'll be something really simple lol (I hope)
George
23/09/2018 13:05:39
Hi
I've managed to print out a copy of the Manuel and followed it best I can but still no joy it seems like the parameters are locked and can't be changed? So inputting the motor plate info can't be done? I checked the wiring again today that's okay. The motor is brand new from "the motor company" aka (TEC) which are about a miles ish from my home so no postage to worry about damage.
Has anyone got any ideas please

George
22/09/2018 13:08:30
Hi
The motor company told me to change the jumpers to DELTA configuration as they were sold in star originally, so I've changed them to DELTA before wiring everything up
George
22/09/2018 11:28:41

Hi everyone,

I'm looking for some help we a 3 phase converter I've been given a while ago, and never used a 3 phase converter before I'm puzzled on how to set it up to run?

I have a small horizontal mill which was on single phase and decided to buy a new 1\2hp 3 phrase motor to go with converter (the motor company helped to make sure I had the correct motor for the converter) so I can better control the cutting speed, instead of having to mess around with the rats nest of pulleys every time I wish to change speeds.

My issue is i have no information/instructions on how to get the inverter to work or how to set the parameters? A electrician friend helped me with the wiring installation so that been done correctly.

Would any kind more knowledge person be able to help please, I'm fairly new to the forum but I've managed to put some pictures in a album

Many thanks in advance

George

Edited By George Jervis on 22/09/2018 11:50:39

Thread: Welding issue for a newbie
13/08/2018 11:43:43
Hi Martin,
Thank you for the advice on cleaning the relay with a fine diamond fill. I have done that and today I have used the welder for a Solid 2 hours welding various metals and it has not cut out once where was before it would have cut out within 10 minutes of its first use. Unfortunately I could only find a 3 amp fuse of the size to fit so I put that in as a temporary measure whilst I get the 2amp one.it would be interesting to see if the 2 amp fuse blows simular to the old one in the future? I'm not saying it's fixed by any means but it's working at the moment.
A big thank you to everyone that gave their time and advise for me 😁

George
12/08/2018 18:18:02
Hi everyone,
Well I've had a good look tonight at the internal parts of my mig welder and put some more pictures in my albums, I still can not see or make out the thermal switch???
I have removed the circuit board which controls the wire feed? The blown fuse looks like a 2amp one. Looking at the board the transformer which I've pictured on the board looks like it's arcing or burning inside? Looks very sooty would anyone be able to point me to where I might get a replacement or how to fix it
Many thanks
George
12/08/2018 07:08:11
Hi,
I was making a 10ft by 4ft metal trellis welding 6mm bar. The welder settings was halfway as I always leave it on that and the weather wasn't extreme like it has been. I forgot to mention the gas still comes out the nozzle when you pull the trigger but I think this is a separate item. I think I've put a few pictures up in my album if I've done it right showing the inside of my
thank you for the help so
George
11/08/2018 23:10:28
Hi,
Theirs no clicking sounds of a relay at all it like the welder is switched off but the cooling fan is running. I'll check all the connections tomorrow hopefully.
Sorry to ask a Silly question if the connections are corroded when I turn the welder off and leave it for a while and then turn it back on why does it work for a while?
George
11/08/2018 21:24:09
Hi
I thought of that first but no it was clear the feed motor doesn't run when it stops. It's like the whole welder is turn off but the cooling fan is still running . The cooling fan normally runs when I turn the welder on which I think is normal?
George
11/08/2018 21:03:05
Hi everyone, 

A bit off topic

While doing a job this week using my late dads mig welder 150 turbo. I could only manage about 6 or 8 tack welds before it stopped working, my father had no issues with . the fan was still running but the wire stopped feeding and striking up. Could this be a thermo cut out switch? It used to work very well last year but now it's frustrating to use.
If it is a thermo cut out switch where would it likey be situated in the welder? I've opened it up but can't see one. 
Any thought and help would be appreciated
Thank 
George
Thread: Milling cutters
29/07/2018 20:20:44

Hi everyone,

The cutters I have are these type

img_20180729_201325_hdr.jpg

29/07/2018 19:48:36
Hi everyone,
I've managed to get I good collection of various size cutters now for my Ajax horizontal mill.my question is When the cutters go dull what would be the best way to sharpen them?
George
Thread: Hello from Dursley
20/07/2018 09:25:01
Hi beaker,
You have a raglan little John lathe which one do you have the mk1 or 2 or 5"??
I have a mk2 with the quick change gear box. Their is a forum for the raglan little John where you may be able to get parts and advise on your rebuild.

George

Edited By George Jervis on 20/07/2018 09:25:47

Thread: Milling vice
11/07/2018 15:41:13

Hi everyone

I'm looking for advice and help please, I'm new to milling having bought a Ajax 8 horizontal mill a few months ago. The only vice i have is far to big and i could do with a lower profile one. Any cutter i have over 3" of which I have only 2 is useless to me as I can not lower the table enough to get it under the larger vice and cutters. Would anyone advice where I could pick up a inexpensive but good vice please??

Many thanks

George

Thread: CovMac Lathes
05/07/2018 19:14:26
Hi Phil
Thank you for the info you pm me. looking at the the pictures of my father's lathe I have the drip tray is identical to yours if you go on lathes.co.uk covmac the pictures at the bottom of the page are of my dad's lathe, we are not sure how he got the pictures on his site as they are all hard copies and haven't been put on the net as my dad never had the internet
George
Thread: Relmac Lathe Help and advice needed.
05/07/2018 08:47:17
Hi David
I used to own one of these lathes I've sent you a pm (private message)
George
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