Circuit board repair

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Circuit board repair

This topic has 7 replies, 5 voices, and was last updated 19 August 2020 at 19:06 by David Drury 1.

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15 August 2020 at 14:40 #32127
David Drury 1
Participant
@daviddrury1
Clarke CL300M XMT 2325 board
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15 August 2020 at 14:40 #490746
David Drury 1
Participant
@daviddrury1
Dear Members

My name is Dave Drury and I am new to the forum, I have been advised there is a wealth of talent who might want to take on a circuit board repair for me as above.

I am expecting to pay for this service and pre payment is not a problem.

A little back ground, I bought the lathe on a whim to add to my many other "toys" I have amassed over the years as an avid DIYer.

I admit I saw it advertized in the local free section and had know idea what I was buying, when I got it home I noted it was made in 1979 (at least not a chinese copy). It had been laid unused for many years with lots of surface rust.

After using it for awhile to get the very basic hang of it, making wheels and bits for the grand kids toys, I decided to strip it down and refinish all the sliding parts. Stupidly and in error after reassembly I started it against the stop while in threading mode ? this drove it into the stop end and it stopped working.

Being an ex industrial electrician I have tested the DC motor after cleaning the armature with a fibre glass pencile, brushes are fine and free, no burn marks, no shorts between segments I used my fluke meter to check the segments for earth faults as well as opposite segments resistance being quite balanced. I think the motor is fine.

Can anyone assist me please, with a repair and possible upgrade as suggested by one of your members Howard, thanks Howard.

Regards

Dave Drury
15 August 2020 at 15:15 #490752
Mark P.
Participant
@markp
Hi Dave, you could probably get a new board from Arc Euro trade.

Regards Mark P.
15 August 2020 at 15:16 #490753
Nick Clarke 3
Participant
@nickclarke3
Regarding upgrades – If you go to the black menu bar at the top of this page and choose Workshop and then click on Machines you will find a series of articles:-
- 3-Phase Conversion and Other Alternative Methods of Powering a Mini-Lathe
- Don't Do This at Home – A T-slotted Slide for a Mini Lathe
These two may be of interest to you as a starting point

Edited By Nick Clarke 3 on 15/08/2020 15:17:24
15 August 2020 at 15:18 #490754
Nick Clarke 3
Participant
@nickclarke3
Posted by Mark P. on 15/08/2020 15:15:08:

Hi Dave, you could probably get a new board from Arc Euro trade.

Regards Mark P.

Or even Machine Mart who were likely the original seller.
18 August 2020 at 16:29 #491287
Bob Worsley
Participant
@bobworsley31976
If it is a DC motor then find and check the fuses. Can't imagine a short overload would prove terminal.
19 August 2020 at 18:31 #491449
Neil Wyatt
Moderator
@neilwyatt
Posted by David Drury 1 on 15/08/2020 14:40:12:

I admit I saw it advertized in the local free section and had know idea what I was buying, when I got it home I noted it was made in 1979 (at least not a chinese copy). It had been laid unused for many years with lots of surface rust.

If it's a CL300M, it isn't a Chinese copy, it's just Chinese.

1979 is too early for a Mini Lathe, they first appeared in the mid-90s. It may have an older part like a chuck fitted.

Neil
19 August 2020 at 19:06 #491456
David Drury 1
Participant
@daviddrury1
Hi Neil

Thanks for taking the time to reply, as I said from the start I bought this on a whim with no knowIedge at all of any mini lathes .

I stand correction from your knowledge, the reason I thought it was a none copy lathe was as it has a serial number stamped on the bed (12679) which although I have a picture of, I cannot add to the post.

It only has the 250 watt motor which I am told is a very early example of the machine, I guess I just thought the chiness lathes only came after someone else did all the design work. Wrong again.

A small update, I have found a kind soul on the forum who is assisting me with an upgraded repair to do away with the old XMT 2325 board.

I very much hope it will rise from the ashes and I will be able to get back onto making toy wheels for the grand kids..

Regards

Dave Drury
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