shielded cable

[Peterkepompier]

I plan to change my entire wiring to shielded cable, but where do I connect the shielded cable normally to ground. But which grounding connector?

[HTheatre]

Hi Peterkepompier,

I plan to change my entire wiring to shielded cable, but where do I connect the shielded cable normally to ground. But which grounding connector?

You have to connect the shields to a GND pin of the 32 bits GRBL board. You can use a ground barrette to limit the number of connection. In this case, you have to connect all the shields to the ground barrette and the ground barrette to a single GND pin of the 32 bits GRBL board.

See ya

[Peterkepompier]

Ok, thanks!

[Peterkepompier]

maybe a stupid question, what GND do you mean? I only see 2 -> reset Gnd and tft gnd

[HTheatre]

Here are all the GND pins of the 32bits GRBL board



On my own RS-CNC32, I used a ground barrette to limit the number of the shields connexions to the board. This one, is home made :





, but you can find one ready to use at AliExpress (for example)



See ya

[Peterkepompier]

ok thanks, but 3 out of 4 are in the 5v environment and the last one is 24v and they can all be connected together, not that I'm causing a short circuit. Or shouldn't I see it that way, GND is GND no matter what

[stu_le_brew46]

I would suggest putting a jumper on the A endstop, as in my machine this seems to have been a source of static pickup causing unexpected aborts, problem went away after I did that.
Although in the solution above where the electronics are in an external box this may not be a problem, in my case the electronics are under the cutting bed.

good luck
S

[HTheatre]

ok thanks, but 3 out of 4 are in the 5v environment and the last one is 24v and they can all be connected together, not that I'm causing a short circuit. Or shouldn't I see it that way, GND is GND no matter what

GND means ground. All GND pins are connected together. So there is no risk of short circuit.

Moreover, I am agree with stu_le_brew46. It is highly recommended to put a jumper on the A endstop.
Even if I didn't finish the wiring of the RS-CNC32 in the assembly manual (link in my sign) this jumper is in the parts list of the manual. I will plug it like described in the next steps.

Finally, if you do not use the physical RESET button (at the front buttons panel of your RS-CNC32), I recommend you put another jumper on the RESET pin of the 32bits GRBL board. If you do not use them, you can do the same for "Feed.H", "C.start" and "Probe" pins, but DO NOT plug any jumper on the "S.Door" pins because it will cause an ALARM for GRBL. My electronics is in a dedicated box, but I anyway put jumpers on "A endstop", "Feed.H" and "C.start" pins.

If you do not have ones, it is not necessary to purchase jumpers specially for your RS-CNC32. You can make your own jumpers with 2 femelle DUPONT 1pin and a very short wire.

See ya

[geostein8888]

Hello,
whats about the ground coming from the 220 V (green/yellow) whats also connected to the frame and powersupply case? Do i have to connect this also to the GND of the gerbl board, or does this finally makes a shortcircuit?

Georg

[HTheatre]

Hello,
whats about the ground coming from the 220 V (green/yellow) whats also connected to the frame and powersupply case? Do i have to connect this also to the GND of the gerbl board, or does this finally makes a shortcircuit?

Georg

Hi Georg,

Some makers have connected all the shields to the ground which comes from the 220V. It seems it is work as well. But do not connect the ground of the 220V to a GND pin of the 32bits GRBL board, because in case of current escape in the ground of the 220V would be used, you will risk to send a hight current in the 32bits GRBL board. As you say, for your safety, you also can connect the aluminum profiles from the base and gantry of the RS-CNC32 to the ground of the 220V.

See ya