Thread: Scored another treadmill.

Thanks for all the replies guys.

The dedicated 3 phase motor from these treadmills seems to have some sort of internal cooling or something as it has no fan. Admittadly the firmware only allows a minimum speed of approx 750 RPM (2.4 Km/h) so it may come into effect at lower rpm I guess. This is not my biggest hurdle. I'm having trouble identifying the communication protocol between the main control board and the VFD motor controller. I'm hoping to only need the motor controller and obviously not use the original console for the treadmill but it appears to be more than just a variable frequency square wave that sets the speed for the motor controller. My 30 year old CRO can't handle it either, it seems to be a higher frequency (1 - 2Khz) signal superimposed on a lower frequency carrier. If this is the case then I got no hope of creating that signal from a simple PIC program!

I'll keep playing. As long as I don't let out the majic smoke I should be right!

Simon