Brother TC-211

I have both ends of the wire. They return to a 50 pin break out board, then from there they go to a relay board. I have not tried to trace them thru the relay board.

I have a 7i77 card.

to connect all the wires I would need a total of 14 wires connected.

As for the hal, I have been using pncconfig wizard. Not really linux literate. I can understand some of the code people post but not really my thing.

mblaszkiewicz wrote: I have both ends of the wire. They return to a 50 pin break out board, then from there they go to a relay board. I have not tried to trace them thru the relay board.

I think for the retrofit the relay board and breakout might be superfluous.
The basic scheme is +field voltage and -field voltage to the 7i77 field voltage connector, to provide references. Then each limit switch connects to + field voltage on one end, and a 7i77 input on the other. (and then the return to 0V field is internal to the 7i77.)
It sounds like you have 9 limit switches in total,

I have a 7i77 card.

to connect all the wires I would need a total of 14 wires connected. You have 32 inputs available, so that should be no problem.
[/quote]As for the hal, I have been using pncconfig wizard. Not [/quote]
I think you are still in the zone that Pncconf can handle.

Only 7 limit switches for now.I have not looked into the tool changer yet.

Also for the 7i77 card I would add one side to the field power (tb2) on the card, the other to tb7 pins 1-7 ????

This is for pcw hoping to get some guidance on writing in the limit switches on the 7i77 card. I have 7 pairs of wires in a n/c setup that had 20 volts except when engaged. Any info would be appreciated

+24V --> 7I77 field I/O power = TB2 pin 1 (bottom)
24V common --> 7i77 field I/O Common - TB2 pin 8 (top)

the switch/proximity switch wiring really depends on how its wired currently

for switches its

+24V --> switch --> 7I77 field input

for PNP proxes its

+24V --> PROX+
24V common --> prox common
prox-out --> 7I77 input

Thanks thats helpful I think

Maybe a bit more info here.

gnipsel.com/linuxcnc/configs/7i77.html

JT

Ok had a little surprise here, and need some help.

I ran PncConfig wizard, set up all my axis and spindle, wired in my limit switches, and applied 24v dc field power from a radio shack transformer.

well when I was done linux would not let me select the config file from pncconfig. I could click on it, but OK was shaded.

So, i tried re booting the PC.

thats when it got interesting. As soon as the system restarted BANG the transformer blew. :woohoo:

Just for some info I have a 7i77 5i25 combo.
My limit switches are 3 per axis.

my x axis home and y axis home are N/O switches.

all the rest are N/C switches.

one side of all the switches are wired to TB7 0-8

the other side is wired togther to a block then to 24 volt field power TB6 2
the transformer was wired to tb6 1-8

So my questions, why did the transformer blow

2nd why wont linux let mestart with my config file.

any answers would be great.

If you mean a 24VDC wall adapter (an transformer puts out AC)
one possibility is reversed polarity

Assuming you wired the + 24V field power to TB2 pin 1 (Bottom of P2)
and 24V common to TB2 pin 8 (top pin of P2),
You should get a yellow field power light on the top middle of the 7I77 card

You are scaring me little a bit mentioning TB6 as that is the serial
expansion interface and does not want any pin connected to 24V

opps tb2 is correct

Also it was a board mount transformer 24v 500 milli amps