BLTouch working
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You may need to adjust the top grub screw down slightly as that controls teh electromagnet and may help it to stick. Also check the voltage right at the bltouch(you may be having some voltage droop over distance and may require some type of capacitor in-line but that's not my field of expertise, V-Droop is strictly a guess)
I had this issue for a short while but it was due to the connections coming loose. I connected them and put heatshrink tubing on them to make sure they stayed together always. I have also had to adjust the grubscrew in the past, I've never had a voltage droop issue though. and on my corexy it has a about a meter of wire between the board and the bltouch.
Thanks. Even disconnected, the pin should hold from what I've seen. With no power to mine the pin just drops, adjusting the grub screw makes no difference. I think it's just defective now.
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You may need to adjust the top grub screw down slightly as that controls teh electromagnet and may help it to stick. Also check the voltage right at the bltouch(you may be having some voltage droop over distance and may require some type of capacitor in-line but that's not my field of expertise, V-Droop is strictly a guess)
I had this issue for a short while but it was due to the connections coming loose. I connected them and put heatshrink tubing on them to make sure they stayed together always. I have also had to adjust the grubscrew in the past, I've never had a voltage droop issue though. and on my corexy it has a about a meter of wire between the board and the bltouch.
Thanks. Even disconnected, the pin should hold from what I've seen. With no power to mine the pin just drops, adjusting the grub screw makes no difference. I think it's just defective now.
talk to the antclabs folks occasionally the magnet will be weak, they will send you a new pin for free, and that usually fixes it.
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I just wanted to thank everyone for their help on the Bltouch.
I just got it installed and working great. Just something that I discovered during setup, watch out for the config override file.
It seems that it was turning heater 3 back to heater status instead of servo. -
Anyone can confirm this wiring?
I read the wiki and it say to connect only 4 wires coming from bltouch isn't the 3 wires gnd connected?BLTOUCH DUETWIFI
2wires cable
GND –----------Z probe GND
OUT--------------Z probe IN3wires cable
+5V–------------+5 (pin1)
GND--------------???????
Control----------Heater3 (pin8) -
Perhaps the ground should be connected to pin 2 of the expansion connector? I don't have a BLtouch, so perhaps someone else can confirm this.
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Perhaps the ground should be connected to pin 2 of the expansion connector? I don't have a BLtouch, so perhaps someone else can confirm this.
Correct.
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Thanks, I've updated the wiki.
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That wiring is correct.
My bltouch is working perfect and i tried a extreme bed compensation with 1.5 mm high on one side and 1.5 mm low on other side and i got a Perfect first layer
BUT is there a code or something so you can "fade" out the compensation. that compensation makes the Z move around and can make ugly prints.
I had that on marlin with my mks board. 3mm was the compensation Then it dont compensate anymore and the print is level.
I have not tried that gcode that fades out in Marlin on my Duet. And i am not on my computer now so i cant see what that gcode is. -
That wiring is correct.
My bltouch is working perfect and i tried a extreme bed compensation with 1.5 mm high on one side and 1.5 mm low on other side and i got a Perfect first layerBUT is there a code or something so you can "fade" out the compensation. that compensation makes the Z move around and can make ugly prints.
I had that on marlin with my mks board. 3mm was the compensation Then it dont compensate anymore and the print is level.
I have not tried that gcode that fades out in Marlin on my Duet. And i am not on my computer now so i cant see what that gcode is.Sure is M376 http://reprap.org/wiki/G-code#M376:_Set_bed_compensation_taper
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Great! Thanks. Will try it later
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Hello,
I wirred my Bltouch yesterday thanks to this thread, it's the new version with something to cut for 3.3V output. I can extend, retract, and simulate the bed contact with my finger with no limit.
But, there is always a problem =), When I launch a G32 with the following code (grid or points), the fourth point is always skipped with the error : ''Error: Z probe already triggered at start of probing move".
Do you have an idea ?Config:
M558 P5 X0 Y0 Z5 H10 F200 T5000 M307 H3 A-1 C-1 D-1 M574 E0 S0 G31 X-30 Y-5 Z3.15 P25Bed:
M280 P3 S10 I1 G4 P50 ;**Mesh bed leveling ;G28 Z ;M557 X10:190 Y10:190 S36 ;G29 S0 ;**Point bed leveling G30 P0 X-12 Y12 Z-99999 G30 P1 X-12 Y190 Z-99999 G30 P2 X170 Y190 Z-99999 G30 P3 X170 Y12 Z-99999 S0 G4 P50 M280 P3 S90 I1 -
Toshi, you should probably decrease your trigger height. 3.15 is an awfully big trigger height, and since your dive height is only 5 (in m558), your z axis only goes up from 3.15 to 5mm, which is too short of a z-lift after each probe, which makes the probe report that it is already trigger before the travel move.
Your BL touch pin (the very tip) should be 2mm above the tip of your nozzle when retracted, which gives most people a trigger height of around 1.5mm. Your dive height of 5mm is normal, so either you need adjust your mount so you can lower your trigger height (by mounting the probe higher), or you miscalculated your trigger height. 3.15mm would be dangerously close to the height of the nozzle, and could catch during prints, so I think that it is more likely that you made a mistake when calculating the trigger height.
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Thanks for you advises, I just finish to redesign my x carriage with 2.1mm différence between probe triggered and nozzle (tested), this program was with the initial mount, not optimized but worked. The issue was a wired cut inside the isolation thus a default.
Now it's working and perfect, maybe tune the speed and hight to have a better repetability. Some times at least 1 point is wrong and the 1rst layer too. -
Hi,
Would it be ok if I used 270 ohms or 220 ohms as resistor, as I don't have 240 ohms.
Thanks
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Hi,
Would it be ok if I used 270 ohms or 220 ohms as resistor, as I don't have 240 ohms.
Thanks
I would pull out a meter and test each of them since they have +-5%
If you have 4 1kohm resistors you can run them in parallel and get ~250ohms. again if you have something close meter them and use the closest to 240ohms
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I am trying to setup bltouch and auto bed compensation
I added at config.g
[c];*** BLTouch
M307 H3 A-1 C-1 D-1
M558 P5 X0 Y0 Z1 H3 F200 T5000
G31 P100 X0 Y-20 Z2[/c]and
[c]M557 X10:290 Y10:290 S70[/c]
Checked the trigger height as described in the wiki but now I am lost.
Where to put G29 command ? Should I use a bed.g config file? where I setup the probing sequence?Also
I am trying to home the axis using bl touch
X and Y home correctly but I can't homing Z axis 'cos bltouch don't deploy during the procedure ( it deploy correctly if I launch the deploy command through console)
My endstop line in config.g is this
[c]M574 X1 Y2 Z0 S0[/c]
Iam using makerboat endstop on x and y and bltouch on z
Thank you -
Is there anyone who can help me ? I am stuck
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Homing Z using a Z probe is done using a G30 command. See https://duet3d.com/wiki/Configuring_RepRapFirmware_for_a_Cartesian_printer#Homing_files. To use a deployable Z probe, you need to ensure that you have set up the deployprobe.g and retractprobe.g files correctly for your probe, then in homez.g and homeall.g put M401 before the G30 command and M402 after it.
If you want to use mesh bed compensation then I suggest you put these commands in bed.g:
M401
G29
M402HTH David
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I am missing some basic information for understand how all the macro interact I reach this results simply copying some posted configuration but I don't understand how the firmware works
When I launch a print, how can I practically run a bed leveling routine and bed compensation?I understand from the wiki there are 2 bed leveling system
G29 and G32 ( G29 is better for a core xy) so I went for G29 .
I have to use M557 command but where? I made a macro with this inside
[c]G91
G1 Z6 F200
G90
M98 Pdeployprobe.g
G29 S2
M557 X30:270 Y30:270 S60
G29
M98 Pretractprobe.g[/c]
and I can run it with G29 so I understand I could simply put G28 and then G29 in the start script in the slicer program , is that right?What if I would use a simply 5 points bed leveling using something like this
[c]G30 P0 X50 Y50 Z-99999
G30 P1 X50 Y250 Z-99999
G30 P2 X250 Y250 Z-99999
G30 P3 X250 Y50 Z-99999
G30 P4 X150 Y150 Z-99999 S0
[/c]
where I should place this commands and How I should run it?Hope You'll excuse me for such dumb questions but I always used Marlin based printer till now
Thank you very much -
Have you read https://duet3d.com/wiki/Using_mesh_bed_compensation ?
You can put the M557 command in config.g assuming that you always want to probe the same bed area. Or it can go in the same file as the G29 command.
Your mesh bed levelling macro looks ok but the G29 S2 line is not needed because the height map is automatically cleared at the start of the other G29 command.
Your 5 point probing sequence also looks good, but of course you need to deploy the probe at the start and retract it at the end.
You could put either sequence in your bed.g file so that you can invoke it with G32.
