routercnc_MK3

[routercnc]

The PC switch-off turned out to be overheating. At least that is all I can think of as it had been on all afternoon machining and it was a very hot day. It's working fine now.



I've fitted all of the buttons and started to wire some of it up. Power on/off, e-stop and reset, auxillary to run cooling pump and fan, and spindle start/stop all work. In the process of wiring up the spindle speed through the 10K pot. I'm hoping to get the readout to show the rpm.

Cycle controls and feedrate are not functioning yet. I've still got the POKEYs board to fit and wire up to get those going.

All the e-stop interlock functionality works (e.g. can't start spindle until e-stop is reset, and pressing e-stop stops drivers and spindle), but I've noticed that if the VFD is off at the mains and you switch on the control system, reset the e-stop to get the drivers on, and press the spindle start button on the new control panel, and then switch the VFD on at the mains the spindle starts straight away. It might be possible to add a further interlock for the spindle start/stop if the VFD is not on but as I can't reach the mains socket and the spindle at the same time its not a big concern just something to be aware of.

[Clive S]

Its coming along nicely when's the party ..Clive

[Neale]

The PC switch-off turned out to be overheating. At least that is all I can think of as it had been on all afternoon machining and it was a very hot day. It's working fine now.

When mine started doing this, I found that the cpu heatsink was full of MDF dust...

[routercnc]

I thought I'd finish off this build thread with the final pictures of the control box, machine, plus my long awaited bed upgrade:

Here is the control box with the door finished and 15" monitor mounted:


I still haven't wired up the POKEYs (cycle start, hold, stop, feedrate) but the rest works.

And the rest of the machine:


The bed was OK but there was often a gap where I wanted to hold something down. It was intended to take a wooden spoil board, and then cutting would happen on top of that. I stripped the old bed out:


Then I machined up a drilling jig to drill each end. There were 4 holes. One pair would take an 8mm clearance and the other pair would take M8 threaded holes. On the next cross member the holes were reversed so that a clearance lined up with a tapped hole etc. The idea was to join each cross member into the back of the previous one and build it up:




Then I added members at the far end. This was to allow cutting pieces on their end and other options. The bed was skimmed to make it level:




Checked it against a known straight edge and it looks pretty good:


Then drilled a matrix of M6 holes for the clamps:


In practice these have not been great and some of the threads have already stripped as the extrusion is only about 4mm thick. I've started upgrading these to M8 which due to the shape of the extrusion will go into a much thicker part.

I've done some machining on the new bed and it is definitely stiffer and gives a better cut than before. Pleased with how it turned out. Will post some pictures of the new bits I've been making in a new thread.

[Clive S]

Well you now have a very nice neat machine with a suburb looking control box. Looking at the picture of the spindle do you have a cable restraint to stop the cable breaking at the plug as this could be detrimental to the VFD.
.
Big thumbs up. Happy New Year

[routercnc]

Hi Clive
Thanks for the comments !

Cable is hard wired (no plug) through the cap onto the motor cables. There is a large cable restraint on top of the end cap which allows a gentle radius on the cable.
I did this after the previous one arced at the plug and blew and killed the VFD.
See post #27 for another picture. I'm away from PC but I posted on it in another thread when my VFD blew

My next machine will have the cable running in energy chains rather than hanging in midair but I need a new longer cable to make that happen.