Build Log: 4'x4' Moving Gantry CNC Router

[GeorgeW21]

Hi George,

I wouldn't use the e-stop system to kill the mains power to the VFD, at least not immediately like that. I don't think they like being turned off while the spindle spools down. Instead install a 3 second (say) delay circuit, or leave it connected normally and use the run/stop signal terminals on the VFD control panel to turn it off.

Hi mate,

Thanks for the tip. That output on the pnoz is on a delay. Variable from around 5s to a minute iirc.

Regards
George

Sent from my EVA-L09 using Tapatalk

[routercnc]

Hi mate,

Thanks for the tip. That output on the pnoz is on a delay. Variable from around 5s to a minute iirc.

Regards
George

Sent from my EVA-L09 using Tapatalk

Apologies George skimmed the dwg quickly. In that case no problem. Those pnoz units are pricey but have nice features.

[GeorgeW21]

Apologies George skimmed the dwg quickly. In that case no problem. Those pnoz units are pricey but have nice features.

Yeah I know, I was pretty shocked when I looked online and saw the retail price . Not having used anything like that before I was a bit worried I wouldn't be able to figure it out, but after a few hours of head scratching with the data sheet I managed to get it figured out. Cheers for taking the time to look over the wiring. Much appreciated.

Regards
George

Sent from my EVA-L09 using Tapatalk

[Neale]

My first reaction is that 36V is a bit on the low side for a machine of this size. Something nearer 65V with drivers and appropriate motors to match would give much better performance.

[GeorgeW21]

Hi All,
Can't believe its over a year since I updated this. I got the opportunity to move the the US with work so the CNC had to go on the back burner for a bit.

Neale - Good shout with the power supply being on the low side. I bought that stepper kit before really knowing anything so its probably not what I would go for ir I was buying again. I'm planning to get it up and running with the power supplies I have but will probably look into putting a larger one in.

The mechanical design has gone through a number of changes and fluctuating goals but I've now got my mechanical design to a point where I am generally happy with it. Losing access to a workshop or garage has meant the size of the machine has needed to drop quite a bit. I've just recieved the 80/20 extrusion for the chassis and the aluminium plate has mostly arrived for the X and Y axies. This has all come as remnants and offcuts from eBay.



Here's the controller mainly wired up testing with the little machine I scrounged.



Cheers
George

[Clive S]

I see you are running 2.7 linuxcnc is now on 2.7.14 so might be a good idea to update the version. Good luck with the build.

[GeorgeW21]

Progress has been pretty slow but still chipping away.

CAD now looks like this:



A few pictures of the build so far: