BLTouch working
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hey dc42. I have a bltouch smart and doing mesh bed compensation on duet wifi. Why is my z-axis not moving like in the video on the first page of this thread? Does mesh bed compensation and autobed compensation cause different z-axis behavior? I also have two steppers in the z-axis connected to ZA and ZB on the duet wifi board. lmk, thanks.
How is it behaving then?
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hey dc42. I have a bltouch smart and doing mesh bed compensation on duet wifi. Why is my z-axis not moving like in the video on the first page of this thread? Does mesh bed compensation and autobed compensation cause different z-axis behavior? I also have two steppers in the z-axis connected to ZA and ZB on the duet wifi board. lmk, thanks.
How is it behaving then?
It stays stationary unless there is a layer change. What I noticed on the other video is that the z-axis steppers would move back and forth based on compensation needs. Does this mean my bed is just perfectly leveled (highly unlikely)?
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I fear I may have messed up! I think I have had my BLTouch connected with a 10ohm resistor instead! Could I have damaged something? I have recently rebuilt the printer and when testing the BLTouch will not self test or fire. It does reset but nothing else? I am picking up some new (240ohm metal film) resistors tonight to replace the current (wrong) one.
Have I screwed my board?
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It's unlikely that you have damaged the Duet.
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It's unlikely that you have damaged the Duet.
It should also be unlikely that I have damaged the BLTouch. So I am guessing that hopefully replacing the resistor will work. Odd as it worked for a year with that 10ohm resistor! Unless I need to adjust the pin? Hmm.. replace the resistor first, and fiddle with the pin after.
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New resistor and now have 2.9v but still have the same issue. The BLtouch does not retract the pin. Also does not run the self test at start up. Hmm??
So, triple checked all wiring. That is all fine.
Probe fires using g-code but won’t retract.
Does not run startup routine.
Will not run self test.
3.3v measures 3.21v
5v measures 4.86v
Vin reading is 24v
Any idea?
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Ok here we go! Problem solved! Turns out it was the proximity of the sensor to the stepper motor. Must be the magnets messing with each other! Move it away works perfectly set it to test mode and put it by the motor and poof, nothing works! Going to have to figure out an alternative mounting position!
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Woohoo, i'm 99% of the way there. My issue is that during G29 mesh levelling, it ..
deploys probe,
lowers bed,
triggers,
raises the nozzle and simultaneously deploys the probe again.I was expecting it to only drop the probe after it has finished raising.
Also, what controls the XY speed during homing?
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The M558 F parameter controls the speed of probing, and the T parameter controls the speed of travel moves between probe points.
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Thanks, what is causing the probe to drop before the head has moved completely out the way?
Also my bed is 300 x 300. I want to probe 4x4 points. Does this look correct?
M557 X20:280 Y20:280 S65
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I just got my BL Touch installed on my duet wifi, followed the instructions on here and another topic. I just have a question as my probe reads 1000 all the time and not 0 ever. I can successfully deploy and retract pin, and the pin retracts when I lightly touch it.
Is there anything else you need?
here is my config section for bltouch, I've not yet set the offsets as I've not yet mounted an extruder as I'm still building my hevo.
M307 H3 A-1 C-1 D-1 ; This is for BLTouch
M558 P5 X0 Y0 Z1 H5 F100 T2000
G31 X0 Y0 Z0 P25 ; Change the x and y for the offset of the sensor in relation to the nozzle and set z offset as normal too.Thanks and look forward to your help
Curtis -
Two likely possibilities:
1. You are using a Duet 0.8.5 and not running the latest firmware, so Z probe mode 5 doesn't work. Upgrade your firmware to 1.20.
2. The output wire of the BLtouch (which is the white one AFAIR) isn't connected to the pin labelled IN on the Z-probe connector of the Duet.
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Two likely possibilities:
1. You are using a Duet 0.8.5 and not running the latest firmware, so Z probe mode 5 doesn't work. Upgrade your firmware to 1.20.
2. The output wire of the BLtouch (which is the white one AFAIR) isn't connected to the pin labelled IN on the Z-probe connector of the Duet.
Thanks, I totally had it in the zstop pins.. whoops.
Thanks again
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Hey,
I just got my BL Touch installed on my duet wifi, followed the instructions on here and another topic. I just have my test reads 1000 all the time and not 0 ever. I can easily deploy and retract when I lightly touch it.
and when I do homez.g he does almost everything when the bltouch comes against the bed then he does not stop the z then just goes up
; called to home the Z axis
;
T0; select tool
G91; relative coordinates
M280 P3 S160 I1; release Z probe alarm
G1 Z5 F2000, lower bed
G4 P500, wait for the bed to lower
G90: absolute positioning
G1 X200 Y200 F3000, move to center
M401, deploy the probe
G30, calibrate Z-axis
M402; Retract ProbeIs there anything else you need?
greetings gideon
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Check your M558 and G31 commands, and see my previous response in this thread.
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hellodc42
I have this in me config.g
M307 H3 A-1 C-1 D-1; bltouch
M558 P5 X0 Y0 Z1 H5 F100 T2000; bltouch
G31 X35 Y0 Z2.6 P25; bltouch -
Check your M558 and G31 commands, and see my previous response in this thread.
I still have the problem that my bltouch does not want to trigger,
after my idea, the settings are right
M307 H3 A-1 C-1 D-1; bltouch
M558 P5 X0 Y0 Z1 H5 F100 T2000; bltouch
G31 X35 Y0 Z2.6 P25; bltouch
i use firmware 1.20if not.
I would like to hear it
what I can do about it, -
If you are getting a reading of 1000 all the time, see my post https://www.duet3d.com/forum/thread.php?pid=34470#p34470.
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Hey,
all wires are connected properly the firmware is 1.20
but I'm afraid my bltouch is faulty, if it is properly mounted then I do not measure anything at all on the output,
if I hang it on them, then it works occasionally and then I measure 4.6 volts without resistance. this is then not connected to the duet just to test so think that the problem is there
thanks for thinking along -
Trying to get y BLTouch working on my Duet WIFI with DUEX 5. I have the Heater7 (H7) disabled and using PWM5 as the servo signal for the BLtouch. I have changed all the settings in the config.g file as per the WIKI and the forum. I can get the probe to deploy and retract but when I send the command M280 P7 S10, the Z Probe box in the web interface stays at 464. When I type in M280 P7 S60, the Z-Probe box in the web interface says 464. No change. I have the latest version of the BLTouch with the trace cut for 3.3 volt. The White wire is hooked to STP and the black wire is hooked to GND on the Z STOP connection.
I am running Version 1.20
My config.g file lines:
; Endstops
M307 H7 A-1 C-1 D-1
M558 P5 X0 Y0 Z1.5 H5 F100 T2000
M574 Z1 S0 ; Set active low endstops
M574 X1 Y1 S1 ; Set active high endstops
;M558 P1 H5 F120 T6000 ; Set Z probe type to unmodulated and the dive height + speeds
;G31 P500 X0 Y0 Z2.5 ; Set Z probe trigger value, offset and trigger height
G31 X0 Y0 Z2 P25
M557 X15:895 Y15:505 S20 ; Define mesh gridAnyone have any idea what I am doing wrong?
I just saw what I did. Z-Probe, Not Z-Stop
