Let the fun begin !!! ???

**Clive S** · 06-03-2015

Originally Posted by PAULRO

http://www.airlinktransformers.com/c...nge/CM0625225/

just my luck to blow fuses. i thought i might have connected it wrong or perhaps i shouldn't have tested in in the manner in which i did. should i wait to get the rest of the supply hooked up or would that matter?

Ok short black and yellow together and take the output from red and orange then you should see 50V You have connected them in parallel . I think the fuse is blowing because of the surge. ..Clive

**PAULRO** · 06-03-2015

cheers Clive , 52.1 beautiful V ac.

**PAULRO** · 12-03-2015

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

**Clive S** · 12-03-2015

Originally Posted by PAULRO

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

Its fine at that and are measuring it without a load as well also the mains voltage will fluctuate.
How about a pic. ..Clive

**JAZZCNC** · 12-03-2015

Originally Posted by PAULRO

finally got back to the power supply and got it set up . i'm reading 73 V DC . is this o.k. ? i know that 68 v dc is the magic number . is there a way to reduce it other than reducing the number of windings. i would not be comfortable with stripping out the coil to achieve that.

What drives are you using.? If 80V max then it will be fine but if 75V max then it's a little close for comfort because as Clive says mains does fluctuate. When your reading 73Vdc what is the Mains input reading.?
Also as Clive says you have no load so connect the drives with motors attached and then check.

**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.