BLTouch working

AaronGreen

What version of RepRapFirmware are you running? It must be quite old if it doesn't support M280 or M401.

I'm using RepRapFirmware: 1.15b (2016-08-25)

AaronGreen

I don't have access to my BW config file at work here, but one thing I would try, is to leave off the I1 (invert polarity) in the M280 command. When I used the BLTouch, it would not work with that parameter set.

So basically just try this to deploy:
M280 P3 S10

I saw your post and tried this solution immediately, but it didn't fix the error.

dc42

You will need the I1 parameter on the M280 command if you have the BLTouch connected to the Heater 3 pin on the expansion connector. If you have a DueX2 or DueX5 connected and you connect the BLTouch to one of the servo outputs on the DueX instead, then you don't need the I1 parameter.

tomasro

If there was a wiring diagram to show that the connections for the BLTouch was to the 4pin Z-probe input, and not the 3pin Z-endstop input, this would have been helpful 2 days ago. To the laymen and on other control boards, there is no differentiation between these items. It would not be conceivable to have an z endstop and a z probe existing at the same time.

@dc42

AaronGreen

@dc42:

You will need the I1 parameter on the M280 command if you have the BLTouch connected to the Heater 3 pin on the expansion connector. If you have a DueX2 or DueX5 connected and you connect the BLTouch to one of the servo outputs on the DueX instead, then you don't need the I1 parameter.

It's just the Duet WiFi by itself. I have tried the M280 command with the I1 parameter, and it doesn't work. It just says Invalid M Code still.

What do I do now?

T3P3Tony

Start by upgrading to version. 1.18

dc42

@AaronGreen:

@T3P3Tony:

Start by upgrading to version. 1.18

I can't figure out how to upgrade the firmware. I have the Arduino program, which I used to update the MKS board with Marlin. Pretty easy.

What's the latest process for doing this for RepRap?

It's all on the wiki, https://duet3d.com/wiki/Duet_Wiki#Updating_Duet_WiFi_firmware.

AaronGreen

@dc42:

@AaronGreen:

@T3P3Tony:

Start by upgrading to version. 1.18

I can't figure out how to upgrade the firmware. I have the Arduino program, which I used to update the MKS board with Marlin. Pretty easy.

What's the latest process for doing this for RepRap?

It's all on the wiki, https://duet3d.com/wiki/Duet_Wiki#Updating_Duet_WiFi_firmware.

Thanks, I just happened to see it at the same time I received your response.

It's now homing X, Y, and Z.

The next issue I have to work through is that it's not stopping on Z, and rams the bed. I double-checked the config update I was using, and used my finger to test the BLT, but it still rams.

I'll go back through the thread, but you have an immediate fix then please let me know.

Thanks for your help.

Jarery

Im using a BLTouch, a fairly new 'smart' version.

It seems to be working correctly, but i've never cut the trace to change it from 5v to 3.3v.

Since its hooked to the 5v output on the duet, whats correct?
A) - Cut it to work at 3.3v
B) - leave it at 5v
C) - if its working don't f$*k with it regardless of settings,
D) - Its gonna blow up, fry the duet, and burn down the house by running at 5v…..

dc42

It's safest to cut the trace.

Nylkos

Been trying to setup my BLTouch for a couple of days…
I can't seem to find out how to do it properly... I do not get the flashing red, the probe retract, deploys a few times and remain red.

I keep getting the Z-Probe field in red

I tried wired has the image below. I also tried with the White wired in the Probe In instead of the E1.

Since the field is red from connecting, I do not believe my issue to be from elsewhere then the Config.g

I am using the 1.19.2 version. On a Duet 0.8.5

I added the required code and .g files

I moved all the requested codes to the bottom for convenience.

; Configuration file for Duet 0.8.5 (firmware version 1.17)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Fri Sep 01 2017 23:00:38 GMT-0400 (Eastern Standard Time)

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves
M555 P1 ; Set firmware compatibility to look like RepRapFirmare

M667 S1 ; Select CoreXY mode
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X300 Y300 Z300 S0 ; Set axis maxima

; Endstops
M574 Z0 S0 ; Define active low and unused microswitches
M574 X2 Y2 S0 ; Define active high microswitches
G31 P600 X1.8 Y3 Z2.5 ; Set Z probe trigger value, offset and trigger height
M557 X15:285 Y15:285 S20 ; Define mesh grid

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M92 X160 Y160 Z800 E100 ; Set steps per mm
M566 X900 Y900 Z12 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z180 E1200 ; Set maximum speeds (mm/min)
M201 X500 Y20 Z250 E250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M143 S300 ; Set maximum heater temperature to 300C
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Network
M550 PMy printer ; Set machine name
M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
M552 P192.168.2.50 S1 ; Enable network and set IP address
M553 P255.255.255.0 ; Set netmask
M554 P192.168.2.254 ; Set gateway
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Custom settings
M307 H1 A506.7 C200.3 D6.0 B0 ; Save hotend PID

M307 H3 A-1 C-1 D-1 ; reserve pin 21 for M42 or servo use
M558 P5 X0 Y0 Z1 H5 F100 T2000
G31 X3 Y-1.8 Z0 P25
T0

deployprobe.g

M280 P3 S10 I1

retractprobe.g

M280 P3 S90 I1

I am seriously stuck…

Thanks you for your help.

davidbitton

@Jdn-za:

Seems I just had the wrong value in my retract macro… awkward

What/which value and what/which macro?

Biggsis

Alright, I have a BLTouch mostly working with my Duet Wifi, G29 is working, map is created and used so far, but I somehow dont get the maths right.
I am using the BLTouch as the Z-Min Endstop and it works so far, bed touches the pin, stops. etc.
But how do I get the right value for the Z-Offset of the probe right?

I have this line:

G31 X40 Y5 Z1.00 P25

the X and Y offset was measured by me, but the Z offset is not the right value, I was more or less just guessing and when I start printing the nozzle is far too close to the bed and I have to BabyStep lift the nozzle by 0.55 mm up in order to print usable on the bed.

Now I am aware that I should change that offset value but where to? Add .55 to the G31 Z Value? Or subtract? I dont get it since I guess I did not completely understand, what the Z offset in the G31 line really is. The distance between the trigger height of the probe and the tip of the nozzle?

Maybe someone can enlighten me about the correct procedure / maths.

Thanks a lot.

Sabagmn

Correct. The Z offset is the difference between the trigger height of the probe and the height of the nozzle tip. So in your case that would be around 0.45, which would be what you put as your Z value.

It basically just means that when your probe triggers, it will know that the nozzle is still 0.45mm above the bed.
Here are good instructions for finding the correct value:
https://duet3d.com/wiki/Using_mesh_bed_compensation

Motalw

@claustro:

@dc42:

Have you read https://duet3d.com/wiki/Using_mesh_bed_compensation ?

I have another problem , when I home the Z probe seems to work perfectly, the printer register the touch point and the home Z button become blue . The problem is the probe that after touching the bed with the pin it start flashing and I have to reset it manually https://www.youtube.com/watch?v=eq2wTy3-kxA
this is my homing routine

[c]G91 ; relative mode
G1 Z4 F200 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
M98 Pdeployprobe.g
G1 X150 Y150 F2000 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height[/c]

Hope you'll be able to understand my very mad English

I have the same problem when the pin drops after homing Z but it doesn't always happen. did anyone have this problem? and how did you fix it?
Also, my homing only works with M558 P1 instead of P5. any idea why?
all connections are correct as far as I know.

Nylkos

No idea, but you seem to be in the same boat has I…

What I had to do:
Like in https://duet3d.com/wiki/Connecting_a_Z_probe
but use P1 instead of P5 and change your P value in G31 (I used P200)

M307 H3 A-1 C-1 D-1 ;
M558 P1 X0 Y0 Z1 H5 F100 T2000
G31 X0 Y0 Z0 P200
use deployprobe.g (M280 P3 S10 I1)& retractprobe.g (M280 P3 S90 I1)

Thread
Source:https://www.duet3d.com/forum/thread.php?id=2539&p=2

Can you post your homez.g file?

I do not have access to my file from work but I might be able to help.

Motalw

I'm at work right now but I believe my Homez is:

; homez.g
; Lift Z relatively to current position
G91
G1 Z5 F6000

; Back to absolute positioning
G90

; Go to first bed probe point and home the Z axis
G1 X15 Y15 F6000
G30

; Uncomment the following lines to lift Z after probing
;G91
;G1 Z5 F100
;G90

one thing came to my mind now… maybe I have used the 10k resistor instead of the 240 ohm. need to double check it when I get home.
would it be a possible explanation?

Nylkos

@Motalw:

I'm at work right now but I believe my Homez is:

; homez.g
; Lift Z relatively to current position
G91
G1 Z5 F6000

; Back to absolute positioning
G90

; Go to first bed probe point and home the Z axis
G1 X15 Y15 F6000
G30

; Uncomment the following lines to lift Z after probing
;G91
;G1 Z5 F100
;G90

did you create deployprobe.g (M280 P3 S10 I1) & retractprobe.g (M280 P3 S90 I1)?
If no, you need to create those files with the command ()
Once you have them, add the Pdeployprobe.g & Pretractprobe.g command in your homez.g file:

M98 Pdeployprobe.g
; Go to first bed probe point and home the Z axis
G1 X15 Y15 F6000
G30
M98 Pretractprobe.g

To test, click manually home X, Home Y, Home Z, do not click home all.

Let me know how it goes

Nylkos

I forgot to mention:
You can try to use the M401 & M402 command instead of the deployprobe.g & retractprobe.g,
I have to use deployprobe.g & retractprobe.g, but I was having issues with the BLTouch.

For me, the M401 & M402 command were working with the M558 P5, but not with the M558 P1

Nylkos

I am suggest that you create a resetalarm.g (your call on the name) file with M280 P3 S160 I1.
That way, you can cancel the alarm by using

M98 Presetalarm.g

instead of remembering the M280 P3 S160 I1 command or resetting your printer.