3 Axis CNC router

**JoeHarris** · 21-04-2017

my collection of electrical bits so far...

**routercnc** · 22-04-2017

Originally Posted by JoeHarris

my collection of electrical bits so far...

Looking good Joe

Does this help your pm question ?

Click image for larger version.

Name: IMG_6079.jpg
Views: 413
Size: 268.9 KB
ID: 21464

P.s always intended to put hot melt glue over these

**JoeHarris** · 23-04-2017

Originally Posted by routercnc

Looking good Joe

Does this help your pm question ?

P.s always intended to put hot melt glue over these

Thanks, they look like beasty cables! I like the idea of using hot glue as insulation.

The psu is coming together: tx, caps and rectifier all mounted to some ali plate. Getting 50V out of the rectifier. Not connected the capacitors yet.

**JAZZCNC** · 23-04-2017

Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.

Edit: To answer your Alarm wire question from below then no I don't.

**njhussey** · 23-04-2017

Originally Posted by JAZZCNC

Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.

Joe, they also take a long time to discharge if nothing is connected to them....

Sent from my HUAWEI VNS-L31 using Tapatalk

**JoeHarris** · 23-04-2017

Originally Posted by JAZZCNC

Joe be careful after connecting the Caps because they will be charged and will give nasty surprise if you short the wires.

Edit: To answer your Alarm wire question from below then no I don't.

Originally Posted by njhussey

Joe, they also take a long time to discharge if nothing is connected to them....

Sent from my HUAWEI VNS-L31 using Tapatalk

Thanks guys I'll be careful!

And good news on the alarm wiring as that would have been a pain.

**JoeHarris** · 26-04-2017

Progress on the psu...

**JoeHarris** · 27-04-2017

I think I've finished the power supply... haven't switched on yet as I want to look it over again with fresh eyes and make sure I haven't done anything dumb! Here she is:

Power in top right via the D curve mcb which will be din mounted and dc out from the lower terminal block. I have wired a 10k resistor between the dc terminals to drain the caps once powered. Any comments before I turn it on?!

**routercnc** · 27-04-2017

Originally Posted by JoeHarris

I think I've finished the power supply... haven't switched on yet as I want to look it over again with fresh eyes and make sure I haven't done anything dumb! Here she is:

Power in top right via the D curve mcb which will be din mounted and dc out from the lower terminal block. I have wired a 10k resistor between the dc terminals to drain the caps once powered. Any comments before I turn it on?!

If you got 50V in post 373 at the rectifier then so long as capacitors are correct way around then should work . . . Only one way to find out

**Neale** · 27-04-2017

Only comment (if you have a chance to make any small mods at this stage) is to add a few more sets of terminal contacts for the output, all wired in parallel. This allows you to run separate power feeds to each stepper driver, rather wiring them daisy-chain fashion, and it's easier than trying to stick three big wires in the same terminal. Not sure if it really make a difference in our class of machine but it is generally considered good practice not to share high-power connections between devices, and it's a lot easier if you have multiple terminals available. Might be able to put multiple spade terminals on each of your contacts, though?