JoeNova:
The problem is, the loop operates much faster than the stepper can react, so it quickly piles up the steps before the temperature hits the target, so the temperature overshoots the target, and then the process starts all over again in the opposite direction. No matter what I do the stepper motor quickly goes from minimum steps to maximum, and back again. That's why I asked if it would over-write.
This is the same problem as in your other Thread where I have already commented on it.
Please don't double post as it just wastes everyone's time.
...R