I always do this to myself..... so here I am using the shop vac to **** a wad of cotton on the end of a pull string through a conduit in the floor of the shop so I can pull some wires to hook up my new grinder. Well whicle I have the back of it open and looking at the mess of wires I noticed that its been repainted a couple of times over. The current battleship dark grey was okay but had a lot of dings exposing the prior and horrifying baby blue paint job it once had. I noticed that both layers of paint seemed to flake and chip off rather easily so there I was for the next couple of days stripping all the old layers of paint off and repainting the entire thing. Could have left well enough alone but no.....
Anyways I moved on to overhauling the electrical which included re-wiring it for 230V operation instead of 460V. In the pedestal column there are several components that require some attention when doing this. First of all if changing the wiring for the 9 lead motor separating some pairs and making some new connections. Second there are two transformers in there. One is on the hot side of the incoming power to provide 120v control circuit power. The other is on the switched side and provides 120v for the eye guard lights. Both need bridge jumpers changed around to set them to 230v input instead of 460v. With all that done and all the other electrical in there (the magnetic starter and the thermal overload and other connections like to the start/stop switch) gone over I decided a couple of mods were in order.
For one I disliked the ginormous external power cutoff so that was detached. I will use the breaker in the electrical service panel. Another is they had the lights hard wired into the base using a typical conduit wire clamp. This means if you want to remove the guard for anything it cannot be detached and is just going to hand there from its wire. So I had a couple of surplus military 3 pin panel mount connectors laying around so I set to drilling into the upper part of the post on each side and added connectors so the lights can be easily disconnected of desired. Next - I wanted to be able to turn the lights on and off at will instead of them just being on if the grinder is on so I drilled the motor base and added a typical basic toggle switch to manually control the lights.
Next I figured since the power here is 4 wire high leg delta 3 phase I may as well go ahead and pull 4 wires in the conduit. If you are not familiar with this type of 3 phase power it has 3 high voltage wires plus a neutral, any one to another of the high voltage wires gives 240v, two of them to neutral or ground each gives 120v, and the wild leg to ground or neutral gives 208v. Pulled 4 10ga wires through even though the grinder really only needs 3 wires since this model just uses straight 3 phase without a neutral or ground. Hence the reason for two transformers in the post.... I could just bypass though now since I now have a neutral wire in there and a ground too since the conduit is a ground but I left them as they were for now. What I did do though is add a low profile box to one side of the post and used the neutral and ground to add a handy 120v GFCI plug outlet to the side of the post. I also added a 20a push button breaker down low in the other side of the post inline with the 120v power to the outlet for extra safety. I put this on a 20a breaker in the main panel and I figure with the GFCI plus an inline breaker specifically for the plug outlet I'm good enough.
Anyways - so far thats all for it. I have not re-mounted the Baldor lighted eye guards yet. I'm debating on that - I actually want to find a set of the correct Twin-Lite guards for it instead. I've sent Wissota an email just to see if they might have a lead on a set for me. If anyone here has a pair I'd trade you for a pair of Baldor ones... My next small mod is I want to add a pilot light to indicate when the thing is running. This grinder is near dead silent which is awesome but for sake of safety I want to have some visual indicator as well when it is running. I have literally timed its coast down with two 10" wheels mounted at just under 3 and half minutes!! I'd also love to find a couple of the original and correct accessories for it like a motor base with the integrated water pot or the guard mounted water pots, tool sharpening attachment, and maybe one day the correct dust vac.
Anyways here is an updated photo of it.... I'll update again eventually with some more.