Thanks everyone for helping with tech support here.
I'm still having a lot of problems with the new forum engine, it's crashing my browsers and even when I can turn enough Java things off to get things more or less working, it still takes 4-5 minutes for any page to load after clicking. I have to click on something, then go and watch TV for 5 minutes and come pack and see if the page loaded. It took me 35 minutes so far to get to the point when I can type a reply in. And I've tried 3 diferent browsers. Anyway that's my problem, so i will stop whining now.
To Garciasa and your problem with the RPM sensor, I have emailed you re setting up the sensor which is the cause of your issues there. A sensor that is not getting good white and black readings will show the symptom of speed instability (or shutdown) at higher RPMs as high RPMs are more critical for the sensor adjustment.
The sensor needs to be pointed at reasonably large flat surfaces, painted white and black. By "large" it means about 3/8" square for each colour, or 1/2" is better.
Your black surface was too shiny and not registering as black according to your SpindleView bargraph test. Also your surface was not flat. The SuperPID instruction PDF shows pictures of what the SpindleView bargraphs look like when correctly set up.
Thanks Devastator, Ger21 and others for helping diagnose this, and you guys were right it was definitely a sensor issue.
Thanks Al_The_Man for helping with the Proxxon router, you are right the Proxxon does just use a normal TRIAC internal speed controller like most routers. Val has discussed Garciasa's problem with me and we are sure the router is fine, the problem is entirely the RPM sensor setup.
Since I may not be here for a while until I get a new computer or better browser setup, you can always get me for SuperPID tech support at my email;
roman AT RomanBlack.com
(change the AT to @ of course) and please put SuperPID and your NAME in the subject line.
Val is always available at the main www.SuperPID.com - Super-PID Closed-loop Router Speed Controller email for general installation tech support and router modifications etc. He's been doing it for 2.5 years now and is pretty good.