> This is a power controller, not a 'speed' control as such Yes, unfortunately the simplicity of the design does mean that it's just reducing the amount of energy available and the load will affect the speed. I'm hoping that loaded and unloaded speeds won't be too problematic. Cutting fine detail in thick wood for example Joe --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .