Need help badly Auto tool Zero

[native34]

I am having problems getting ths auto tool zero touch plate to work properly i have connected th single wire to port 15 which does not get mapped to anything except this i can't get any light on the screen when touching to the tool. The only way to get this to work is for me to attach a second wire to the +5 on my BOB but then when i i touch the plate to my mill the motors move which won't work. If i just touch the two qires together i get the desired results but everyone else who has done this onl has one wire hooked up what am i doing wrong!!!!

[LaserImage]

I have two wires on mine. One goes to the bob ground and the other goes to the input I selected for the probe. The ground wire is connected to the tool with an alligator clip and the other wire connects to the plate. Check with the mfg of your bob and ask them what two wires to connect, but it should be a ground and an input.

Gary

[native34]

I have a CNC4PC C11 Multi function board and pin 15 is an input pin then they have a +5V right next to it same with pin 10-13 should i be looking for another place to hook up the second wire

[Greolt]

CNC4PC have a habit of clamping the inputs low with a pulldown resistor.

Fine for limit switches etc. Not what is needed for this type of Zero setting plate.

You need an input that is high when at rest and can be made change state by grounding.

If it were mine I would remove the pulldown resistor. But that is if it were mine.

There are lots of other ways to make an Auto Tool Zero device. Something that incorporates a switch for example.

A circuit to invert the signal is another. You just lose the simplicity of the zero plate.

Greg

[native34]

So what you are telling me is with my current setup it can't be accomplished. I do have an extra Parralell port free on my computer so i tried to hook up a wire from pin 15 on this and another to 18 which should be ground i still hve no results. There has to be a way to accomplish this without to much hassle even for a novice like me (LOL). I guessi will just have to call CN4PC on Monday to see how this can be accomplished wit their board. if not what is the work around.

[Greolt]

"So what you are telling me is with my current setup it can't be accomplished."

No, I am telling you there is more than one way to skin a cat.

If you have a second LPT and know enough to hook up to pins 15 and 18, then it should be fairly straight forward.

What I tell people is, forget about wires, zero plate, on screen buttons and macros for now.

Just concentrate on getting the Digitise LED on the diagnostics page to change state when you ground the input.

Get that happening and all the rest will fall into place.

Greg

[native34]

Yeah but just hookinjg up pins 15 and 18 aren't enough as i still have nothing happening. I have went into ports and pins and PP1 is enabled and i went into inputs and Probe is enabled and set to port 1 pin 15 and active low. How do others have this working with 1 wire right now i would just be happy to get this working i don't care how many wires i haveto hook up. I wouldn't say i am a complete ID10T when it comes to this stuff but sometimes i just get baffled and need someone to just spell it out in the simplest terms possible where you could explain this to a toddler and they could follow it.

[Greolt]

"Yeah but just hooking up pins 15 and 18 aren't enough as i still have nothing happening."

OK if shorting 15 to ground (18) does not change the state of the Digitise LED then you might have a setting wrong.

You did mention this is on a second LPT. Should that be Port 2? Do you have the Port Address set correctly? Do a search, lots of info on this.

Is Probe input set in Ports and Pins?

Greg

[native34]

I am actually using parralell port 2 as my main and the PP1 is not being used i just re enabled it to see if it would work for this purpose. Before i got the new PP card i used to use PP1as my main i even had limit switches on it so i don't think the address changed. I might just have to pick up another card to see if it works

[jalessi]

Attach a 470 ohm resistor between +5volts and pin 15

Run a wire from pin 15 to your touch plate

Make sure your spindle has a ground or you will need to attach a ground wire to your tooling every time you want to use the tool setter.


If you still need help instant messeger me at

AOL Screen Name: jalessi

Yahoo Screen Name: alchemist135


Jeff...

[jalessi]

You can use any free input for the touch plate on the CNCPC C10

The trick is push the input high since all of them are low by default.

We use the CNCPC C10 all the time and they work perfect.

Jeff...

[native34]

[QUOTE] Attach a 470 ohm resistor between +5volts and pin 15 Run a wire from pin 15 to your touch plate [QUOTE]

I did this part and i was able to get the LED to light when i touched the wire to my machine but that was all that happened i also had to put my toch plate on a piece of paper to keep the light from coming on when i would set my touch plate to the vise. With this setup do i need to have a second wire attached to my BOB, and is the C10 the same as the C11 as far as this type of configuration?

[QUOTE]Make sure your spindle has a ground or you will need to attach a ground wire to your tooling every time you want to use the tool setter.[QUOTE]

What is meant by this if by touching the wire to my machine and the light coming on would that mean that it is already grounded?