Comments sought on new build: A CNC Router for RC Gliders and Planes

**njhussey** · 20-03-2015

How about soldering the 1 wire from the caps directly to 3 smaller wires and connecting them to din terminals.

Then connecting from there to MCB's before going to the drivers?

**Clive S** · 21-03-2015

Originally Posted by njhussey

How about soldering the 1 wire from the caps directly to 3 smaller wires and connecting them to din terminals.

Then connecting from there to MCB's before going to the drivers?

You don't need mcb's just fuses if you want (I personally don't bother) but that sort of arrangement is better. You could do the same thing with a decent choc block or the fuse block that that you indicated before. That would in my eyes be a decent solution. At the end of the day it is up to you. ..Clive

**JAZZCNC** · 21-03-2015

Originally Posted by njhussey

How about soldering the 1 wire from the caps directly to 3 smaller wires and connecting them to din terminals.

Then connecting from there to MCB's before going to the drivers?

Yep that's how I do it.!
Look at bottom din rail and on Far Left you'll see MCB's for toroidal Transformers, 24v psu, VFD along with Din terminal banks for Mains voltage.
On Far Right you'll see Din Fuse terminals for Drives and 0v & 24V bank of Din terminals.
Terminals in middle are for I/O to the machine, ie Limits etc.

Click image for larger version.

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**Clive S** · 21-03-2015

Neil I have been thinking about it and Dean is quite correct I had forgot you will be using this in a works environment and needs to be done correct. If you had a fire the insurance might not pay out if it was not done ok.
So fit MCB's etc .. Clive

**njhussey** · 23-03-2015

Re-done the connections...

**Clive S** · 23-03-2015

Neil You have passed the test

very nice

**njhussey** · 23-03-2015

Cheers Clive, except that I put a N label on the live terminal!!!!!

**Clive S** · 23-03-2015

Originally Posted by njhussey

Cheers Clive, except that I put a N label on the live terminal!!!!!

Ok then two points deducted.

**njhussey** · 24-03-2015

Full marks though for it working, it's giving a nice steady 72V. It is taking a while for the capacitors to discharge but then there's no real load across them...

How can I safely discharge the capacitors with no load on them.......just to point out I've no resistor to drain it.....yet!!

**njhussey** · 24-03-2015

Ok so I'm drawing up my wiring diagrams, ill start with the power to the PSU'S and 230V driver. I've got on and off push buttons I think that the off button needs to go in the safety part of the circuit as it needs to kill the power to the drives through the relay?

I blinking hate electronics!!!