CNC 3020 Enclosure/Upgrade

[irving2008]

4k7 on the base is slightly too small, your logic 1 level will be 2.8v assuming 5v rail which is marginal for noise IMHO. I'd go to 10k at least.

[Pointy]

4k7 on the base is slightly too small, your logic 1 level will be 2.8v assuming 5v rail which is marginal for noise IMHO. I'd go to 10k at least.

Many thanks Irving, a 10k resistor on the transistor base worked a treat, I was able to squeeze it in without remaking the PCB which was also good. Here's a couple of pics...

Today I did the mains wiring and started on rewiring the stepper motors, I think I have identified the connectors used as JST SM connectors, and just need to order some male/female crimp pins for them to be able to finish it off.

While I was away I thought about the front panel, it would be nice the engrave some text/lines for a nice professional finish. I just wondered if anyone else had done this and managed to fill the engraving with black paint to good effect?

I think I have also decided to fit some form of LCD display, which I could use to display various info from Mach3 instead of a bunch of LEDs. I could also look at building a speed sensor for the spindle and displaying the speed on the display as well.

Anyway I think tomorrows job will be to try and design the front panel, stay tuned.

[Pointy]

I spent a bit of time on the front panel and this is what i have come up with...

The 3 rockers are mains (red), lights (grey) and spindle (green). To the left is the Estop switch with status LED underneath (bicolor). To the right of the rockers is the spindle speed control with yellow LED indicator. The top 3 LEDs are home switches (green), probe (blue) and limit switches (red). Underneath is the PC power button with green power LED and orange HD LED. (I may do away with the PC switch and just set it to auto power on in the BIOS)

The right hand side of the panel consists of the 2 joysticks, LCD display and 9 buttons which I will use to control some basic functions in Mach3.

[Pointy]

The LCD screen and crimp pins arrived yesterday, but it's going to have to wait until the weekend, as there are just 2 days left of the fishing season!

In the meantime I need to fathom out how to export from sketchup to DXF for Jazz. It gives me several options, polyface mesh, polylines, triangular mesh, lines and stl, but I am not sure of which to use. I need to download a DXF viewer to see what is being exported.

The other thing I need to do is the side panels, which both have cutouts for the 92mm cooling fans, but these are pretty straight forward. I think I could just go for a circle of 90mm rather than the rounded square they show in that PDF.

[ukracer]

The LCD screen and crimp pins arrived yesterday, but it's going to have to wait until the weekend, as there are just 2 days left of the fishing season!

You do fishing as well ;) Are you in the UK?? I might be of some use to you. Which makes me less concerned about asking for assistance ;)


Regards Andy T