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Author Topic: Pokeys57CNC and probing  (Read 8522 times)

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Re: Pokeys57CNC and probing
« Reply #20 on: June 07, 2017, 02:35:27 AM »
There is still huge problems with probing. So this issue is not fixed
Re: Pokeys57CNC and probing
« Reply #21 on: August 12, 2017, 03:30:52 PM »
I have been having some mails with Polabs lately, and we might have found the problem with probing and the fix for it.

Anyone else here getting "Probe interrupted" as the probe doesnt work ?
Re: Pokeys57CNC and probing
« Reply #22 on: September 04, 2017, 03:28:34 AM »
I have been having some mails with Polabs lately, and we might have found the problem with probing and the fix for it.

Anyone else here getting "Probe interrupted" as the probe doesnt work ?

Yes I am getting still that error.... Though G code probing works somewhat at least and been using that "temporarily" until the probing gets fixed.
Re: Pokeys57CNC and probing
« Reply #23 on: September 04, 2017, 03:30:00 AM »
Ohh though I have not tried latest version of plugin :D have to test it later when I got time
Re: Pokeys57CNC and probing
« Reply #24 on: December 21, 2017, 02:56:03 PM »
I want to confirm the v1.3 board does NOT need the external pull-up?
- Robert Beaubien
- Drone Plastics
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“Dear Algebra, Please stop asking us to find your X.  She's never coming back and don't ask Y.”
Re: Pokeys57CNC and probing
« Reply #25 on: April 19, 2018, 08:49:45 AM »
Hi guys, I have exact issue with the probe as you have. Is this a Pockeys57CNC issue? Is there any update on this?

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Re: Pokeys57CNC and probing
« Reply #26 on: March 24, 2019, 02:14:22 PM »
I had the same problem. Turns out that Pin 19 has no input filtering so sometimes it triggers too early especially if you use a mechanical sensor. Mach 4's touch UI checks the state of Pin 19 after each G31 move and throws an error if it is inconsistent. To fix the issue you need to add a RC filter between the probe sensor and Pin 19.
Re: Pokeys57CNC and probing
« Reply #27 on: March 24, 2019, 03:03:03 PM »
RC filter?  You talking about an inline coil, or a choke around the wire?
- Robert Beaubien
- Drone Plastics
-
“Dear Algebra, Please stop asking us to find your X.  She's never coming back and don't ask Y.”

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Re: Pokeys57CNC and probing
« Reply #28 on: March 26, 2019, 05:34:15 AM »
RC Filter -> Resistor + Capacitor
This is what I did:
The red area is the RC filter and the rest is an inverter (N-Channel Mosfet) because @NeoTO said using it with the invert option and also forcing a cleaner on/off state.

I selected the values by choosing an R (500) significantly lower than the Pullup (10k). Based on that I choose a time constant of 10ms and calculated 20µF for C. I didn't measure with the scope, I just pulled the 10ms out of thin air, they might be one or two orders of magnitude to large.

But that doesn't matter because I am probing at 50mm/min, the 10ms will lead to 8µm offset, which stays constant and can be included into the calibration.
Re: Pokeys57CNC and probing
« Reply #29 on: March 26, 2019, 11:34:41 AM »
Excellent.  I will try that.  I get so tired of MACH4 complaining about the input.
- Robert Beaubien
- Drone Plastics
-
“Dear Algebra, Please stop asking us to find your X.  She's never coming back and don't ask Y.”