3 Axis CNC router

**JAZZCNC** · 18-04-2017

Originally Posted by routercnc

Also I'd add a switch to the water cooled spindle pump - looks like it will run all the time which will be annoying plus may heat the water a little

No he's running it thru the VFD relay so will only run when the Spindle is ON.

Joe: Is this different scheme to the ones you've been sending me because don't remember seeing 12V in there.? Thou must admit was only looking at the parts you asked me about.

Anyway dump the 12V and wire the Fans in series and buy 24V pump.

**JoeHarris** · 18-04-2017

Originally Posted by JAZZCNC

No he's running it thru the VFD relay so will only run when the Spindle is ON.

Joe: Is this different scheme to the ones you've been sending me because don't remember seeing 12V in there.? Thou must admit was only looking at the parts you asked me about.

Anyway dump the 12V and wire the Fans in series and buy 24V pump.

It's a new addition because I have a 12v pump but not a big deal - a 24v pump will be cheap enough in the scheme of things! You are right about the VFD switching the pump on so guess being able to switch manually on the mcb will not be all that useful.

How about this one: https://www.ebay.co.uk/itm/172219861161

**JAZZCNC** · 19-04-2017

Originally Posted by JoeHarris

It's a new addition because I have a 12v pump but not a big deal - a 24v pump will be cheap enough in the scheme of things! You are right about the VFD switching the pump on so guess being able to switch manually on the mcb will not be all that useful.

How about this one: https://www.ebay.co.uk/itm/172219861161

Ah, ok thought was unusual for me to miss something obvious like that.!

Yep, that pump will be fine.

Regards the MCB then don't really need MCB but the suitable fuse is required to be safe but only in case of short it's not something you'll use has a switch.
The VFD Relay will handle this for you and because you'll only ever run the pump when the spindle is spinning you'll have no need to manual overide.

**JoeHarris** · 19-04-2017

Originally Posted by JAZZCNC

Ah, ok thought was unusual for me to miss something obvious like that.!

Yep, that pump will be fine.

Regards the MCB then don't really need MCB but the suitable fuse is required to be safe but only in case of short it's not something you'll use has a switch.
The VFD Relay will handle this for you and because you'll only ever run the pump when the spindle is spinning you'll have no need to manual overide.

Thanks Dean - do you tend to screen your alarm signals between drives and IP-M?