Let the fun begin !!! ???

**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

**PAULRO** · 25-03-2015

cheers Clive , i have a 6A in there , i just for got to update the dwg.! i better change the fuses around .

**PAULRO** · 26-03-2015

O.K. state of play so far is that i have the back panel in the cabinet and i'm doing some electrical dwgs so i can at least give myself a fighting chance to get it right . i have a couple of queries before i go and start lashing in wires though. this is what i think i know from reading the posts , so i just need some nudging .

1......am i correct in saying that i need a separate input for the slave home switch?
2 .... i need a separate input for the rest of the home switches combined in series.
3... because i'm combining both limits and home into a single switch i must keep the e stop on a separate input.
4... i also need an input for feed / hold
5..... and an input for stop.
bring my total of inputs to 5 ( MAX. allowed)

i also have alarm terminals on my drive so i'm curious about how i can get these in to an input. i will post some drawings of my proposed electrics as soon as i'm finished.

**Clive S** · 26-03-2015

Ok
1: = yes
2: = yes
3: = yes
4: = yes
5: = yes
You can add an extra two BOB's to your motion controller if you like then you would have 15 inputs. ..Clive

**JAZZCNC** · 26-03-2015

If your going to have a feed hold button then you need a Cycle start button to get going again so you'll need an input for that. No point having External feed hold button without cycle Start.!

Also with homing and Slaving then you need to make sure " Home slave with Master" is UN-Ticked in General Config.

Also UN-Tick " Home sw Safety" if your sharing limit & home switches as the switch will be treat as Limit when homing and E-stop the system.

With #3 then you don't need E-stop on it's own Input if wired in series with limits just Set the E-stop Pin to same number as the input your using.! Then when switch is pressed Both Limit and E-stop Led will light in Diagnostics.

**PAULRO** · 26-03-2015

Ok
1: = yes
2: = yes
3: = yes
4: = yes
5: = yes
You can add an extra two BOB's to your motion controller if you like then you would have 15 inputs. ..Clive

maybe down the road i might contemplate an extra BOB . i have to get this set up right first and get very familiar with the whole process.