Anthony wrote: > >> You can get DIY circular saws with built in soft start [1] but not stand
> >> alone starters for older tools. ?After lining up the saw guide on the
> >> workpiece I want to slot the saw into the guide, then switch on without
> >> it jolting out of alignment. ?It might be time to break out the
> >> soldering iron... Vic replied: > > A circular saw is just a motor; pretty much any motor controller circuit
> > or even a lighting dimmer circuit could be adapted for the job.
LOL, I see I did miss out "how?"
James wrote: > Arn't triacs ON/OFF switches and to adjust the amount of power, they
> simply switch it on/off quickly. Will this actually help you?
For a speed controller you pulse width modulate each half cycle of the
mains supply. When power is applied I need to ramp from 0 to 100% pulse
width over the first 2 seconds, providing a soft start (with the saw off
load).
There's probably some reason it's difficult to find a circuit for this,
but the annoying thing about having so little knowledge is that it's
easy to imagine the circuit must be simple :-)
