3871
General Mach Discussion / Re: AC dimmer via Mach3
« on: March 10, 2015, 03:27:13 AM »
Check out SSR's (Solid State Relays) - many types are 'opto-isolated', require less than 10mA drive current and can be driven directly from the Mach3 PWM signal (spindle control) and will switch a/c mains voltages proportionally with the PWM waveform. As they switch at the 'zero crossing point' of the mains a/c there is little or no EMI noise produced by their operation and this may offer a solution.
Tweakie.
Tweakie.