All Limit Switches in series vs seperate pin for every axis

Dear All,

I am struggling with limit switches and hence asked my self whether it does make sense to simplify my Setup (at least for debugging purpose).

Currently I have max and min limit switches for each axis. Each "string" of limit switches is connected to a seperate PIN on the breakoutboard. What is the advantage of such setup over having all switches in series, besides getting a message which of the axes hit a limit switch?

Thanks in advance for you appreciated help,

Louis

Louis Cypher wrote: What is the advantage of such setup over having all switches in series, besides getting a message which of the axes hit a limit switch?

That is it, can not think of any other advantage at the moment.
Since you already have it wired like that, what is the actual problem you're having ?

I was wondering wether there are some EMC related advantages (shorter cable length), but anyhow I managed to get my switches up and running (the error was right between my ears; wrong PIN assignment). I'll leave them connected one pin per axis.

Glad you got it working.

it simply breakes down to the amount of pins you got
on a parport 12/5
you only got 5 inputs if you have choosen the wrong BOB you may only got 4
so it is a need to get them in a row

pl7i92 wrote: it simply breakes down to the amount of pins you got
on a parport 12/5
you only got 5 inputs if you have choosen the wrong BOB you may only got 4
so it is a need to get them in a row

Parallel port has 3 working modes, so it can do :
"out" for 12 out/5 in
"In" for 4 out/13 in
"X" for 8 out/9 in
Some parallel ports do not support that, but all the ones i had till now do, including add on PCI cards with MosChip by NetMos.

fully agree
the standard is 12/5
and most do not change that
there are up to 8 parports availableon linux so it is enoph pins on low budget

So far the maximum i used was 3 parallel ports for some testing with the "etch servo" config, some very cheap servo drives and some 40 to 100W servo motors. It worked nicely.
Still having some ideas for more tests in that direction, but life is getting in the way.

are this edge servos resonal for europ and big mashines
im building right now a 3x2meter at 1200 T wit a 5 to 8 axis option
at sfu2510
that woudt need a 400w servo to speed up

If the home switches are all separate then all axes can home simultaneously.
If the max and min switches are separate then you can jog off of them (I think, I have never wired this way). But if homing is configured then you should never hit the limit switches anyway.