routercnc_MK3

[routercnc]

Some progress. Putting my hand under the extractor shoe feel likes a reasonable draft so I think it will do the job.

I won't be cutting anything for a bit as I've decommisioned the control box to make the new upgraded version. Here is the old control box - low voltage basic all-in-one system which has run well for over 5 years now, but time for an upgrade:

It was pretty clean inside as you can see so the filter on the left was doing its job well.

Here is the revised electrical layout - the one I posted a while back would not have worked as the relays were linked in series! There are some other 'improvements' as well:


Here is the progress on the new control box:


As you can see I was inspired by Eddy's control box to make a better job of it this time round.

Top row left to right:
Invertor/VFD 1.5kW
12V PSU (ancillaries, BOB, safety relay and limits)
60V 10A PSU for X1, X2, Y2 drivers
32V PSU for Z driver (out of old machine)

Next row:
permanent 12V terminal block
permanent 0V terminal block
relay switched 12V terminal block (the photo is now out of date as I had intended to use this as a 5V terminal block)
Master relay with 4 outputs - latching function, driver relay control, BOB e-stop trip, Spindle run inhibit
4off 30A automotive relays (5pin) to control the drivers
star earth point terminal block

Final row:
Breakout Board - Fairly cheap board (~£10 ebay) but with space for something much bigger/better should the need arise(!)
3off DQ860MA 80V drivers for X1, X2, Y1
1off MD542 48V driver for Z

Tool collection so far - That bootlace ferrule tool (orange) makes a really nice job of the cable terminations, thank you to those who recommended that route:


I've posted the front control panel in another post but will repeat it here for completeness:


I've ordered the Pokeys board which will fix to the back of this control panel, keeping all the wiring local on the front panel and just leaving the USB to run to the main board. This will control the feed start/pause/stop/rewind, feedrate override, and feedrate reset in Mach3 using the Pokeys plugin. All other functions will be hardwired in simple circuits.

Now a question on the relays. Earlier in this post I asked about diodes across the coil - 1Nxxxx series was mentioned but when I looked this up recently there were so many to choose from! So I did a google search specifically on suitable diodes and found mention of an SR5100 5A 100V Shottky Diode so bought a set of 5 for about £2 as I was buying some other stuff anyway. Before I fit these to the relays are they suitable?

Can someone confirm that the grey bar on the part is the 'bar' in a diode symbol and that this faces the positive end of the relay - see layout diagram.