Z Probe missing trigger point
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Could this be related to signal interference? I got all my wires from the duet wifi and up to the extruder going side by side the whole way.
When im doing a G29 command while the printer has not started printing anything it usually manages to get through the 9 points without failing. However when a print is started and the heat bed and extruder is active it rarely get past the third or fourth probe point.
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That might be due to interference, especially if it is triggering too early. Unfortunately the BLTouch is closed source, so there is no schematic that I can look at to determine how sensitive to interference it is. But if you have it connected to the Z probe input, adding a resistor of about 10K between the Z probe connector IN and 3V3 pins might help. Increasing the P parameter in the G31 command would also make it less susceptible to interference.
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That might be due to interference, especially if it is triggering too early. Unfortunately the BLTouch is closed source, so there is no schematic that I can look at to determine how sensitive to interference it is. But if you have it connected to the Z probe input, adding a resistor of about 10K between the Z probe connector IN and 3V3 pins might help. Increasing the P parameter in the G31 command would also make it less susceptible to interference.
I have not added the 10k resistor so I can give that a shot. If that does not help then I will try to isolate the cables. Thanks for the input!
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That might be due to interference, especially if it is triggering too early. Unfortunately the BLTouch is closed source, so there is no schematic that I can look at to determine how sensitive to interference it is. But if you have it connected to the Z probe input, adding a resistor of about 10K between the Z probe connector IN and 3V3 pins might help. Increasing the P parameter in the G31 command would also make it less susceptible to interference.
When you say add a 10k resistor to the IN connector, do you mean between the probe itself and the pin or IN between ground?
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I mean between the IN pin and the 3V3 pin.
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I mean between the IN pin and the 3V3 pin.
Oh, was not familiar with "3V3" pin, but a google search said that would be the 3.3v pin. All the pins on the board is 5v that it is connected to, so the resistor would be between z probe IN and the ground next to it? (tried that without any diffrence)
I also came over this: https://plus.google.com/113792662927481823969/posts/Sfig2jd4bvM
Seems like the ground on the z probe connector is not attached. Is that a possibility too? I guess I got some more trial and error to do. Will post back as soon as I get somewhere.
Edit: A little more trial and error has been done. Neither of the resistors I have tried made any diffrence. Earlier I was able to finish probing from time to time, but now it seems like the probe won't manage to even track one hit without failing. I noticed that when I retract the probe I can hear three small buzzes before it releasing the alarm.
I might try to reset all settings and do it from scratch on another port just to be sure that its not a mistake I have made.
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Now it seems like my 3DTouch is not tracking any signal what so ever. It can not get through any probing points at all. The z probe value never changes to "1000" upon triggering it. Deploying and retracting works, however when retracting the probe goes into alarm mode. Could my probe be defective?
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Does the Bltouch documentation describe what conditions put it in alarm mode? It's closed source, so otherwise it's hard to know.
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Does the Bltouch documentation describe what conditions put it in alarm mode? It's closed source, so otherwise it's hard to know.
Not as far as I know. Can't seem to find anything on it. As the probe was working from time to time earlier with the same setup I would assume its the probe. Its not triggering at all unless its in the alarm mode.
Will probably buy a new probe soon ish, and this time an original bltouch. Got too much finals starting in my studies now so it might take some time before I post back with an update!
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Alright, so it looks like it was an issue with the 3DTouch. I bought a BLTouch and got it installed today. So far no steps have been skipped!
