Questions about wiring

[Phife]

Hello all, I have a few questions about wiring up my CNC. If anyone can help it would be greatly appriciated.

I have 4) 72v 12A max Servos, 4 G320's and a 65v 20A power supply.


1) Should I fuse the incoming AC to the power supply? if so what size fuse?

2) Is it ok to fuse the DC side of the power? Like fuse before each gecko to protect my servos from over current? Ive read conflicting info on fuses on the DC side. If i can what size?

3)Should I fuse anything else? Is it ok to use a circut breaker in place of a fuse?

4)Will i need to put a current set resistor, or any other type of resistor in my wiring?

[TOTALLYRC]

Hello all, I have a few questions about wiring up my CNC. If anyone can help it would be greatly appriciated.

I have 4) 72v 12A max Servos, 4 G320's and a 65v 20A power supply.


1) Should I fuse the incoming AC to the power supply? if so what size fuse?

2) Is it ok to fuse the DC side of the power? Like fuse before each gecko to protect my servos from over current? Ive read conflicting info on fuses on the DC side. If i can what size?

3)Should I fuse anything else? Is it ok to use a circut breaker in place of a fuse?

4)Will i need to put a current set resistor, or any other type of resistor in my wiring?

1. Yes. Ask the transformer supplier or use a fast blow fuse rated for the max ac input power, if it is listed on the power supply.

2. Yes. use a fuse based on the gecko recomendations. IIRC It is not the shutting down the dc power that can blow the drive, it is the sudden inrush of power when turning on the dc power that can kill the drive.
When you switch the ac side of the power supply, it is much slower to ramp up and the drive electronics have time to protect the drive.
That said, never replace a blown fuse with the ac power still on.

3. It all depends on what else you have, not sure on the circuit breaker. However, fuses are cheap, and if you are popping them and want a breaker instead, fix the problem and keep the fuses. I haven't popped a fuse on my router in ~2 years, until I got some swarf into the drive during an upgrade and blew the drive.

4. I don't remember off of the top of my head, check the owners manual from Gecko to see.

Mike