So after a period of intermittent issues, followed by weeks of no problems, then back to intermittent issues, my start stop on my tablesaw has finally given up.
I've spent most of lockdown tidying/sorting the garage into a workshop, which included building the saw into a new bench. Replacing the saw is not a financial option right now so I need to get this repaired as efficiently as I can.
The problems have basically been that some time back the saw refused to stay running. Pressing start would run, then releasing start would break the connection. Holding start depressed allowed the machine to run, as SWMBO can attest as I got her to crouch down holding the button whilst I made a few cuts and showered her in sawdust.
We then recently had a period of no issues and yesterday it went downhill rapidly. Only by, what I can only describe as "jabbing" at the start button and holding it for a few seconds would the saw run. I stripped down the start/stop and cleaned it out, applied some WD40 to the coil etc and we had normal operations for a few hours on and off. Later on though I lost this functionality too. Now jabbing the button produces a momentary motor noise and slight twitch in the blade rotation followed by nothing. The start and the coil are not engaging to keep things running.
I'm 99.9% it is the start stop button, not something further down the line so with that in mind I visited Toolstation to get a new DOL starter. https://www.toolstation.com/axiom-dol-starter/p56285
Ok here goes the bad news: It's a Scheppach TS30 table saw, which doesn't use a straight forward start stop or wiring arrangement. I know, I know, but I was young and naive. It does have a powerful motor, great cut depth and now thanks to my bench I've built round it a new fence and mitre slots parallel to the blade.
Here is the info I have:
I could do with a little help / re-assurance in choosing the overload relay, and with the eventual wiring solution. As you can see this particular saw is powered from a schuko inline plug with L N & E but after the coil and switch uses a 3 core + earth arrangement going to the motor. I'm not sure if the 3rd core is a return feed to indicate high temperature or overload and cut the power or if it is an additional power to something else? Capacitor perhaps?
From the info I have I went with the 4Kw DOL as I saw 2.2Kw on the plate and thought double for startup load. From there I'm thinking this https://www.toolstation.com/axiom-thermal-overload-relay/p31837 relay as the 5-8 amp range covers the 6A I can see on the pictures.
Then it's the wiring. I get how to wire up the DOL for 2 core + earth, but to be honest, that 3rd core is really throwing me off.
From reading around I know we have some good guys on here when it comes to electrical, so...
Help?!?