Well, I have a master disconnect in the form of a switch in front of the VFD which allows me to disconnect all power to the machine for service work without having to run to the elec. panel and hit the circuit breaker.
It occurred to me that instead of routing the incoming through the red rotary switch, if I bypassed that switch and instead put the switch in series with the power-on low-voltage line to the VFD that might be a better arrangement. This would use the electric brake when I hit the switch.
On 4/10/2006 at 10:18 AM davedamouth wrote:
Yes. In order to be a real safety circuit, the power to the drive
needs to be interupted. Might not be foremost on the minds of a
hobbyist, but interupting a logic circuit while leaving the drive
powered is haphazard.
Now that you're learning about the multitude of commands and inputs,
anything becomes possible. If you prefer a single pushbutton to
cancel any speed or direction, toss one on. You can use the safety
interlock to do it, but be sure to leave an alternate master
disconnect. (a plug intead of hardwiring would suffice for the home shop)
--
Regards,
Rich
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Richard Kleinhenz
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