How to wire z probe.

[Molex 1701]

Hello,

I've been able to successfully home the Cyclone and I can jog the z axis to lower the bit to touch the copper. With a multi-meter I can confirm the bit is touching. 

I'm using RAMPS 1.4 and Grbl 0.9g and I am trying to figure out how to wire up the z probe.   Using "pin 18 is labeled as min Z (connect the probe wires here)", I've identified what set of pins on the RAMPS is for the minimum z stop and which of them is pin 18.  So I've wired one alligator clip from pin 18 to the bit in the spindle. Then the other alligator clip from the circuit board goes where?  I've tried it with Ground and with +5Vs.  My Cyclone just keeps trying to push the bit more into the copper.

So close to getting this to work I can taste it. 

Good day.

[Mauricio Martins]

Hi,

the Z probe pin is the Analog In 5 (A05).

Cheers!

[Mauricio Martins]

GBRL v0.9 changes

• Probing: The G38.2 straight probe and G43.1/49 tool offset g-code commands are now supported. A simple probe switch must be connected to the Uno analog pin 5 (normally-open to ground). Grbl will report the probe position back to the user when the probing cycle detects a pin state change.

On Wednesday, March 9, 2016 at 6:24:22 PM UTC, Molex 1701 wrote:

[Molex 1701]

You mention uno. Guess I should had mention that its RAMPS 1.4 and Arduino Mega. Though I thought that was only way for it.So is this a new Grbl for Cyclone I should try? I am just really confused on where the A5 Pin comes from cause looking at code it seems to be PIN 18. Though neither seem to work for me.

[Carlos García]

Hi Molex, with grblforcyclone in a RAMPS board, the Z probe should be wired to the connector labeled as "min Z". Cyclone uses endstops for X and Y, but not for Z. So we are reusing the pin for the min Z, as the probe

One of the wires of the probe should be GND, the other one minZ

If the machine is not properly triggering, you can try these:

- Manually estabilish the contact between the two electrodes, even detaching them from the tool and copper substrate (sometimes these make false triggers, there may be a ground path through the spindle, etc)

- Adding an external pull up resistor (a 10kOhm resistor between +5V and "min Z")

- Also, make sure that the configuration of GRBL is correct. Did you wipe out the EEPROM (non-volatile memory of the arduino, which stores the configuration) before flashing GRBL for the first time?

- Finally, if none of the above works, the issue must be related with a faulty cable or even a burnt microcontroller pin. I don't think this is the case though

Cheers,

Carlos

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[Molex 1701]

Hi, Sorry hadn't been able to work on this in few a days.

At first I hadn't but I saw other troubleshooting post and I erased the eeprom and reloaded the program with Arduino IDE.

I tried the shorting of ground to z min sense pin. And soon start the probing process I get probe fail.

I put a 10k resistor to 5+,z min sense pin to pcb, ground to bit. I get probe fail error.

This mean my Arduino MEGA is fubar? 

On Saturday, March 12, 2016 at 12:34:36 PM UTC-5, Carlos Garcia Saura wrote:

Hi Molex, with grblforcyclone in a RAMPS board, the Z probe should be wired to the connector labeled as "min Z". Cyclone uses endstops for X and Y, but not for Z. So we are reusing the pin for the min Z, as the probe

One of the wires of the probe should be GND, the other one minZ

If the machine is not properly triggering, you can try these:

- Manually estabilish the contact between the two electrodes, even detaching them from the tool and copper substrate (sometimes these make false triggers, there may be a ground path through the spindle, etc)

- Adding an external pull up resistor (a 10kOhm resistor between +5V and "min Z")

- Also, make sure that the configuration of GRBL is correct. Did you wipe out the EEPROM (non-volatile memory of the arduino, which stores the configuration) before flashing GRBL for the first time?

- Finally, if none of the above works, the issue must be related with a faulty cable or even a burnt microcontroller pin. I don't think this is the case though

Cheers,

Carlos

On Sat, Mar 12, 2016 at 3:40 PM, Molex 1701 <rtw...@gmail.com> wrote:

You mention uno. Guess I should had mention that its RAMPS 1.4 and Arduino Mega. Though I thought that was only way for it.So is this a new Grbl for Cyclone I should try? I am just really confused on where the A5 Pin comes from cause looking at code it seems to be PIN 18. Though neither seem to work for me.

On Saturday, March 12, 2016 at 7:32:43 AM UTC-5, Mauricio Martins wrote:

GBRL v0.9 changes

• Probing: The G38.2 straight probe and G43.1/49 tool offset g-code commands are now supported. A simple probe switch must be connected to the Uno analog pin 5 (normally-open to ground). Grbl will report the probe position back to the user when the probing cycle detects a pin state change.

On Wednesday, March 9, 2016 at 6:24:22 PM UTC, Molex 1701 wrote:

Hello,

I've been able to successfully home the Cyclone and I can jog the z axis to lower the bit to touch the copper. With a multi-meter I can confirm the bit is touching. 

I'm using RAMPS 1.4 and Grbl 0.9g and I am trying to figure out how to wire up the z probe.   Using "pin 18 is labeled as min Z (connect the probe wires here)", I've identified what set of pins on the RAMPS is for the minimum z stop and which of them is pin 18.  So I've wired one alligator clip from pin 18 to the bit in the spindle. Then the other alligator clip from the circuit board goes where?  I've tried it with Ground and with +5Vs.  My Cyclone just keeps trying to push the bit more into the copper.

So close to getting this to work I can taste it. 

Good day.

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[Simone Petrino]

Molex i have the same problem... you solved?