Let the fun begin !!! ???

**PAULRO** · 12-03-2015

I'm waiting for the drives ( EM806) ,bob ( PLC4x-G2) , and motion control( PLCM-E3) card to arrive from Zapp. I just have the 70 V DC supply hooked up . i 'm hoping i'll have the electronics from Zapp tomorrow because i'll have a weekend run at the panel so hopefully the voltage will drop when i hook up the electronics and motors as you say. i 'm reading a steady 230 v ac at the input side. i haven't got the bleed resistor hooked up either and i'm still reading 45 v dc at the cap even though i powered it up for a minute or so yesterday. still, this is progress for me because i never built a supply before , so hats off once again to the heads sharing the knowledge.

**PAULRO** · 13-03-2015

my electronics won't be with me until monday / tuesday . i had an email stating they're in transit , i put some more bits on the back plate i had an old 5vdc power supply plug in type set a side for the motion control card . i couldn't get a din mounted supply locally and i didn't want to wait for ebay so i'll give this a try. i still have to change the fans around on the box i'll tackle that tomorrow . i hope!!!

**JAZZCNC** · 13-03-2015

Can I make a few suggestions.!!

I wouldn't locate the VFD and the PSU next to the BOB and Motion control card and drives. Both these are very noisey devices and they could introduce noise onto the signal wires.
Ideally you want them furthest away from any signal devices like BOB and Drives.

Personally i'd have PSU and VFD at top and Drives/BOB/Control at bottom with Connections/24V psu etc in between with separation.

**PAULRO** · 15-03-2015

I had to put a breaker into my main board to support the extra load for this cnc and i forgot to power down my p.c. so the end result was a p.c. with a blown power supply .
i had a spare one from another m/c but it had different connectors so i spent the morning cutting and pasting.... who needs it ? anyway i changed the panel around and put the noisy bits on top i have to put more fuse holders, terminals etc. in tomorrow.

**PAULRO** · 25-03-2015

i 'm just getting back into the build today and i have the electronics mounted on the back plate. i have a query regarding the fuses for the 70 V DC power supply. i have the fuses on the negative side of the supply , is that o.k. ?

**Clive S** · 25-03-2015

Originally Posted by PAULRO

i 'm just getting back into the build today and i have the electronics mounted on the back plate. i have a query regarding the fuses for the 70 V DC power supply. i have the fuses on the negative side of the supply , is that o.k. ?

Its good practise to put fuses in the +ve side and the mcb for the input to the transformer appears to be 3A I would think you need more like 6A because of the inrush to the coil and rate it to a motor type ..Clive