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[Nr1madman]

Okey, Im now in trouble again after mayor brainfreeze :)

Have routed my homeswitches.
I connected them in parallell.
Brown wire = 24v
Blue wire = gnd
Black wire = signal to bob

If I use this config I get 24v when measuring between black and blue.
If one switch gets close to steel they all light up and the voltage goes to 0 between black and blue.

If I use this paralell connection the bob gets supplied with 24v on the output pin?
Should I instead connect it in series ?
Can't get my mind around this :)

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[wallyblackburn]

Okey, Im now in trouble again after mayor brainfreeze :)

Have routed my homeswitches.
I connected them in parallell.
Brown wire = 24v
Blue wire = gnd
Black wire = signal to bob

If I use this config I get 24v when measuring between black and blue.
If one switch gets close to steel they all light up and the voltage goes to 0 between black and blue.

If I use this paralell connection the bob gets supplied with 24v on the output pin?
Should I instead connect it in series ?
Can't get my mind around this :)

Home switches, or limit switches? If all are going to a single input, then limit... What input (although you said output) are you connected to on BOB? E-Stop? Regardless, your BOB is probably looking for 5V, yes? If so, you need to make a voltage divider to take that 24V to ~5V - maybe an 18K/4.7K resistor divider.

OTOH, I don't know squat about your BOB, controller, etc., so maybe I should just zip it...

[Nr1madman]

Home switches, or limit switches? If all are going to a single input, then limit... What input (although you said output) are you connected to on BOB? E-Stop? Regardless, your BOB is probably looking for 5V, yes? If so, you need to make a voltage divider to take that 24V to ~5V - maybe an 18K/4.7K resistor divider.

OTOH, I don't know squat about your BOB, controller, etc., so maybe I should just zip it...

My simple bob handles 24v so thats fine.. you say input and that makes me think I did right :D

Im going to use two inputs for homing (one for x y z and one for a which is slaved )
Limits are for another input.
Probe and e stop makes it full :)
Have to get one more bob!


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[wallyblackburn]

My simple bob handles 24v so thats fine.. you say input and that makes me think I did right :D

Im going to use two inputs for homing (one for x y z and one for a which is slaved )
Limits are for another input.
Probe and e stop makes it full :)
Have to get one more bob!

I think we need to define home and limit. Home is a reference point, limit means "any further and something bad will happen". If you want to home each axis, you'll have to use an input for each axis. Limits can be connected to same input because, if any are tripped it is an error situation and you just want all to stop ASAP. You can then determine what the problem is.

Does that make sense?

Regards,
Wallace

[Nr1madman]

I think we need to define home and limit. Home is a reference point, limit means "any further and something bad will happen". If you want to home each axis, you'll have to use an input for each axis. Limits can be connected to same input because, if any are tripped it is an error situation and you just want all to stop ASAP. You can then determine what the problem is.

Does that make sense?

Regards,
Wallace

Yes, total sense if you home all axis at the same time. You can actually home one axis at a time and back of the sensor so you can sense the next "home"

When / if I buy another bob and get more inputs I can home all at the same time :)

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[Desertboy]

Yes, total sense if you home all axis at the same time. You can actually home one axis at a time and back of the sensor so you can sense the next "home"

When / if I buy another bob and get more inputs I can home all at the same time :)

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Not sure how you have it setup but you have 5 input pins this is how I am setting mine up. Z and Y1 sharing a pin, then X & Y2 on their own pin which leaves a pin for touch sensor and a pin for estop. Then set it up to home Z first then home X&Y at the same time. This is good for me as the Z is then always at the highest point before it moves the X/Y so clearing any brackets I have strung across the bed.

I have Y1 and Y2 as I have 2 microswitches and 2 motors on the Y axis. So when it homes it can adjust itself square. This was a bitch to do in linuxcnc lol and I have to do it again when I set the Mesa up but shouldn't be so bad the 2nd time.

I'd connect limits to the estop if you have separate ones after all you should never use them unless something has gone wrong but you can also wire all the limits to share the touch setter.

[Doddy]

If I use this paralell connection the bob gets supplied with 24v on the output pin?
Should I instead connect it in series ?
Can't get my mind around this :)
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Just clarify "the bob gets supplied with 24v on the output pin?" - you mean the input pin, designated for the home switches? If "input" and not "output", then okay, I'm with you...

You cannot (easily) connect proximity switches (NPN by the sound of it) in series - not without ancillary switch-gear. In parallel, with a common input into Mach3, and inverting the input in the set-up (if necessary), this should work fine.

Provided, of course - the bob supports 24V input (most cheapies are 5V, but you can adapt these easily to 24V if necessary with a resistor) - sorry, not read back in the thread to check your bob.

Can you explain more clearly your concern?

[Nr1madman]

Just clarify "the bob gets supplied with 24v on the output pin?" - you mean the input pin, designated for the home switches? If "input" and not "output", then okay, I'm with you...

You cannot (easily) connect proximity switches (NPN by the sound of it) in series - not without ancillary switch-gear. In parallel, with a common input into Mach3, and inverting the input in the set-up (if necessary), this should work fine.

Provided, of course - the bob supports 24V input (most cheapies are 5V, but you can adapt these easily to 24V if necessary with a resistor) - sorry, not read back in the thread to check your bob.

Can you explain more clearly your concern?

Thanks for helping!

Well it seems Im confused as usual.
Ment input and that makes it good I think ;)


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