Z probe stuck at 1000 with smart affector
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Might unplug the hotend fan and see if it drops back to 0.
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Looks like you have a wiring problem. With P5 in the M558 command the pullup resistor is enabled, so you will get a reading of 1000 with nothing connected to the input pin.
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cool, knowing that im guessing i miswired it, i pulled the 6 pin and its still at 1k
is my wiering correct?
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i updated the firmware to 1.19 checked the wiring, my z is still at 1000.
i can send a M672 S131:131 and it blinks 5 times like its receiving commands. -
Your wiring looks correct. My guess is that you have a bad crimp connection at one end of the white wire; but there it could be a problem on the strain effector instead. So check the following on the strain effector:
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That pin 5 of the 8-way connector (the pin that the white wire connects to) has been soldered on the underside of the board. That connector has to be hand soldered, so it's possible that a pin has been missed.
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That resistor R5 is present and both ends of it are soldered down. It's on the underside of the board close to the 8-way connector.
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i checked my crimps and that that resister was there and still 1000 in my z.
https://imgur.com/a/sp6VA -
got it working, by using M558 P1 R0.4 F1000 X0 Z0
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That's odd. If it works with M558 P1 then it should work with M558 P5 as well, unless somehow the output resistor on the effector (R5) has much too high a value, or there is a bad connection in the output wire.
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You have two M558.
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Comment out the one in the Endstop with a colon ; and test it. Can always change it back.
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Unplug the 8-pin socket from the effector and push the 2 ends of a piece of wire into pins 5 and 6 of it. That should give a Z probe reading of zero. If it doesn't, then the problem is most likely a bad crimp connection in the cable, or a wiring error, or a firmware configuration error. You can check that by shorting together the IN and GND pins of the Z probe connector on the Duet. If that makes the reading go to zero, then the fault lies in the cable.
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I'm glad you solved it. I find it impossible to check by visual inspection that crimped cable connections are OK, so when I make PanelDue cables up for customers, I always check the cable with a multimeter, or by using it to connect a PanelDue to a Duet.
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Hi, i have almost the same problem, that the probe is stuck at 1000. If i short pin 5 and 6 it goes down to 0. When i try setting using M558 P1it goes down to ~939. Any idea what the problem could be?
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Does the green LED on the smart effector behave normally?
Are you shorting pins 5 and 6 on the effector itself to get the reading to go down to 0, or are you shorting them somewhere else?
Is resistor R5 present on your effector and properly soldered? It should measure 1K.
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The green led is behaving normally, it's blinking twice at boot-up and is green all the time when the reading is at 1000. It is when I've shorted the pins on the effector that i get the reading 0.
The resistor R5 is present on the board and from what i can see it's properly solderd, but I havn't mesured its resistance yet, have to do it this afternoon. -
The R5 measures to 996 ohm so it should be fine
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After blinking at startup, the green LED should be off, at least when the effector is stationary. If it's always on, then either the effector is faulty, or something (most likely one of the fans) is generating enough interference to trigger the sensor. If you disconnect the 6-pin cable that feeds power to the heater and fans and then power up, does the green LED still remain on? If so, then the effector is faulty and you should ask for a replacement.
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You are correct, if I disconnect the fans the sensor behaves normally; its off after the initiall two flashes and then flashes if i tap the hotend with my finger.
But since the fans are triggering a signal of 939 of 1024 I guess I'll just have to drop the sensitivity till the fans doesn't trigger it anymore
Edit: I should add that I use the supplied 30mm fan for the hotend and the 40mm fan attached via your design:https://www.thingiverse.com/thing:2467663 if it helps someone else
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It is OK with just the E3D 30mm fan running? It doesn't matter of the print cooling fan interferes with the sensing, because you don't need to probe with the print cooling fan on.
Is it a 12V or a 24V system?
Make sure that both wires in the pair from the fan follow the same route to the connector. This should normally be the case, unless you have split the wires apart.
Some people using large heatsink cooling fans have extended the heatsink fan duct to place the heatsink fan further away from the electronics.
HTH David
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No, on factory settings just the 30mm fan is triggering the sensor. The system is running on 12V.
