Comments sought on new build: A CNC Router for RC Gliders and Planes

**routercnc** · 08-07-2015

Sounds very sweet too! Given that you are also running at around 70V it must be down to the digital AM882 stepper drivers ? - mine are DQ860MA on 1600 microsteps but still have a hint of roughness when running.

Bit worried about your 5 minute e-stop trip problem - something getting warm?

**njhussey** · 08-07-2015

Originally Posted by routercnc

Sounds very sweet too! Given that you are also running at around 70V it must be down to the digital AM882 stepper drivers ? - mine are DQ860MA on 1600 microsteps but still have a hint of roughness when running.

Bit worried about your 5 minute e-stop trip problem - something getting warm?

Cheers!! I'm not too sure what it is, could be I have the Nema34 drive configured wrong, could be an earth problem, could be my E-stop circuit....I'll try isolating one thing at a time tomorrow and see :)

**njhussey** · 09-07-2015

Well after earthing the frame, taking off the additional Oh Shit!! switch, taking out the driver alarm safety circuit it was still tripping out....so I swapped the Pilz for a standard relay and just wired the E-stops to this....seemed to sort it so I'm presuming that either the Pilz is faulty or my wiring circuit to it was crap....

Now trying to get the driver alarms into the E-stop safety circuit....and failing so far, but it's early days....

Did I say before that I hate electrical stuff.......

**njhussey** · 09-07-2015

Question.....

On the Leadshing AM882 alarm output it's not completely going to closed connection....reading the manual I need a 2k resistor greater than 0.125W??

Can someone who's electrickery minded please explain it to someone stupid what I need?

The diagram (real rough sketch...sorry!!) of what I've been playing with (need to alter so I'm putting the 0V through the E-stops really) today below....

**njhussey** · 10-07-2015

Well after a false start (I used the info from the sticky thread on the 2.2kW spindles to wire the spindle connector) wiring the spindle I got it going. My plug had the pin numbers very feintly on it which I ignored....until it kept tripping the socket....then I looked and saw I'd wired one pin to the earth....so a bit of re-wiring and off it spun.....so that's another tick in the box...still don't like electrics ;)

**Clive S** · 10-07-2015

Originally Posted by njhussey

Well after a false start (I used the info from the sticky thread on the 2.2kW spindles to wire the spindle connector) wiring the spindle I got it going. My plug had the pin numbers very feintly on it which I ignored....until it kept tripping the socket....then I looked and saw I'd wired one pin to the earth....so a bit of re-wiring and off it spun.....so that's another tick in the box...still don't like electrics ;)

Are you going to control the spindle speed through Mach or with a pot?

**njhussey** · 10-07-2015

Thinking of doing it through Mach Clive.

**Clive S** · 10-07-2015

Originally Posted by njhussey

Thinking of doing it through Mach Clive.

Well if you do want to fit a pot on the vfd it can be done for about £2 :- post one http://www.mycncuk.com/threads/7388-...ighlight=speed

**njhussey** · 11-07-2015

Cheers Clive, I might fit one and then have it as an optional overide, I fancy using Mach to control the speed through the IP-M's 0-10V output...

**njhussey** · 13-07-2015

Set up the Spindle on Friday....manual only at the moment...

https://youtu.be/EBhi_Tt6478

Just putting the limit and home switches on the machine now.....going to wire them direct to the IP-M I think rather than daisy chaining them through a relay....can always add that later...