Looking for Diamond fretsaw switch box design to replicate.....

[toolsntat]

I've just got a brand new Diamond Fretsaw and need to make/get the switch and speed controller.
Do you have any information on the components inside please?
Cheers, Andy

 

[scrimper]

I've just got a brand new Diamond Fretsaw and need to make/get the switch and speed controller.
Do you have any information on the components inside please?
Cheers, Andy

I presume this is the one you obtained from Sam (he contacted me via my website).

The Diamond controller is very simple and uses 'bog' standard components. there are only three electronic parts 1) a simple on/off toggle switch. 2) a potentiometer and 3) a controller chip 604A.

However the saw uses a series wound universal carbon brush type motor (the original motors that Doug Woodward used were made by the Carter Romford company) and were fitted to some domestic spindryers.
The joy of using this type of motor is that unlike Induction motors they are easily controlled my many standard speed controls or a very easily made up version.

When I get time I will add some information about the controller on the diamond page of my website.

There is a thread about the controller here. https://www.ukworkshop.co.uk/threads/speed-control-switch.145228/

Just to let you know that Sam gave me permission to put his photo of the saw on my website (it might be the last one Doug was working on)

Regards
John