8191
General Mach Discussion / Re: Pretty little lights or something else
« on: June 13, 2010, 09:26:55 AM »
Hi Sweep,
At least 1 relay must be reserved for the 'Beer Dispenser'. Essential for good CNC work.
Seriously though, be careful what you switch with mechanical relays.
Anything which may cause a spark across the relay contacts such as a mains voltage inductive load (spindle) must be adequately suppressed (the type of RC device found across the switch inside mains operated power tools work well) otherwise the resulting spike may well cause a systems crash.
Tweakie.
At least 1 relay must be reserved for the 'Beer Dispenser'. Essential for good CNC work.
Seriously though, be careful what you switch with mechanical relays.
Anything which may cause a spark across the relay contacts such as a mains voltage inductive load (spindle) must be adequately suppressed (the type of RC device found across the switch inside mains operated power tools work well) otherwise the resulting spike may well cause a systems crash.
Tweakie.