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Power switch for Myford ML speed 10

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Mike Gibbs18/11/2011 08:27:05
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14 forum posts
I have just acquired a Myford ML speed 10 lathe. In very good condition, with many accessories, but no power switch. I'm rather unhappy to run it by just plugging in to a mains socket. What do people suggest for this? I'm a "beginner" in many ways and am not clear what options are available.
 
Many thanks
 
Mike
NJH18/11/2011 10:10:09
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2314 forum posts
139 photos
Hi Mike
 
Yes you really should have a switch between your supply and the motor. One scenario is that you are machining away and there is a power cut and everything stops. You leave your machine, forgetting to switch off, and later the mains comes back and, of course, the lathe starts up again. You can imagine the possible conequences!
Something called a Direct-on-Line Starter is what you need which will trip out when the mains is removed. It will also offer overload protection.
There is an example Click here
 It also has a nice big STOP button which you can hit in an emergency!
I used to have an ML10 and we spent many happy hours together!
 
Regards
 
Norman
 
 

Edited By NJH on 18/11/2011 10:11:48

Edited By NJH on 18/11/2011 10:13:57

Clive Hartland18/11/2011 10:11:20
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2929 forum posts
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The original switching form the ML10 is a box fitted to the left front of the cabinet (Assuming its on a cabinet)
It has the ON switch with reversing and a big red knob for emergency 'OFF
Running the lathe from a 13Amp socket switch is dubious as in an emergency you may not be able to reach it.
Perhaps look on EBay or approach the new owners of the spares etc for Myford.
Be prepared to pay good money, up to £100 for the switching.
I will look later and see if I have any ref. numbers for you.
 
Clive
Engine Builder18/11/2011 16:03:04
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267 forum posts
I have been a happy ML 10 user for many years. My lathe origionaly had a Dewhust rotary switch supplied but I replaced it a few years ago with a switch from Chester tools.
This is much better to use, it has push button start and stop and a rocker switch for forward and reverse also features a no volt release relay. . Its for panel mounting but I bought a plastic box from Maplins and mouted it on the bench. The swich was less than £20!
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NJH18/11/2011 18:09:48
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2314 forum posts
139 photos
Hi Clive & "Engine Builder"
 
I note you both mention a reverse facility on the ML10 and I remember it was available on mine. I can't remember ever using it however. Given the need for care with screw on chucks when / how often do you use it ?
 
Regards
 
Norman

Edited By NJH on 18/11/2011 18:10:21

Clive Hartland18/11/2011 20:25:18
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2929 forum posts
41 photos
I only use the reverse when cutting threads Norman, I do not use it for cutting in reverse as you have pointed out that the chuck would unscrew
But. I now have a back plate and another chuck with a ring clamp on the back plate so I can cut with the machine in reverse.
I still feel that you need a no volt release and a safety switch device for the stop and start on the lathe.
 
Clive
Les Jones 118/11/2011 20:43:08
2292 forum posts
159 photos
Hi Mike,
If you do a search on ebay for "NVR" you will find a good selection. Axminster tools also sell them.
 
Les
Clive Hartland19/11/2011 15:44:43
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2929 forum posts
41 photos

Here is a pic. of my ML10's power switching. The Myford part number is:- 85766

Edited By Clive Hartland on 19/11/2011 15:45:18

Mike Gibbs21/11/2011 09:08:10
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14 forum posts
Many thanks for all these suggestions. I've found an NVR with BIG red stop button on the Axminster site (http://www.axminster.co.uk/axminster-axminster-emergency-stop-nvr-switch-prod452985/). It is rated at 13A, so hopefully will do the job. Any final thoughts before I order it?

Mike
David Clark 121/11/2011 09:10:06
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3357 forum posts
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10 articles
Make sure they include wiring instructions.
regards David
 
 
NJH21/11/2011 10:29:36
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2314 forum posts
139 photos
Hi Mike
 
That is certainly a step forward and it may be sufficient however I see that it doesn't provide overload protection. The overload I believe provides protection to the motor in the event of overheating from - understandably - an overload ( major jam up, failing bearing etc). There is some information here
Now I'm not an expert in this area ( or perhaps any other area!) but maybe one of our other contributors can information on the advisability of providing the overload facility.
 
Regards
 
Norman
Crocadillopig21/11/2011 11:51:40
30 forum posts
4 photos
Hi Mike
I fitted the same switch as you from Axminster tools to my ML10 a few years ago and have never had a problem. It is not wired for reverse but much like Norman I have never found the need for it.
 
Regards
Russ
Les Jones 121/11/2011 12:33:59
2292 forum posts
159 photos
Hi Mike,
If you do want a unit with overload protection Machine mart sell direct on-line starters which will provide it as well as the NVR function. To provide overload protection they MUST be rated to suit the motor. It should also be possible to use these in conjunction with interlocks, remote start and stop buttons and emergency stop buttons.
I do not think it is really necessery to provide overload protection as you will probably notice the motor slowing down if you overload it . My Chester DB10 G lathe does not have overload protection and I suspect that most other hobby lathes do not.
 
Les.
NJH21/11/2011 13:09:35
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2314 forum posts
139 photos
I knew Les would have the answer to this!
 
I guess the overload protection is needed more where a motor is running and you are not near it. With your lathe you will be stood next to it all the time. So, whilst it may be a "nice to have", if you are aiming to save money I would consider a large "STOP" button more useful - you are sure to come across a panic situation some day! ( The Machine Mart buttons are very small)
 
[The large "Stop" button on my mill is right in line with my knee! ]
 
Regards
 
Norman
Mike Gibbs22/11/2011 08:26:24
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14 forum posts
Very many thanks to everyone. I have ordered the unit from Axminster Tools, and it should be here tomorrow.
Jim Guthrie22/11/2011 09:10:53
128 forum posts
5 photos
Posted by Mike Gibbs on 22/11/2011 08:26:24:
Very many thanks to everyone. I have ordered the unit from Axminster Tools, and it should be here tomorrow.
 
The overload protection on my ML10 is a slightly slack setting of the countershaft so that the belt slips on very heavy loads. I can't remember when I had to adjust it tighter.
 
Jim.

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