Yet another BLtouch problem

Macgyver

@phaedrux said in Yet another BLtouch problem:

M98 P"config.g"

12/17/2021, 5:43:26 PM M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Error: bad grid definition: Too many grid points; suggest increase spacing to 28.5mm
Error: in file macro line 73 column 33: M563: expected number after 'F'
Error: Tool 0 not found
Error: Tool 0 not found

Interesting, does this mean it's not seeing the probe at all? Guess kinda makes sense with no blue light...

Phaedrux

@macgyver said in Yet another BLtouch problem:

this seems correct as I am connected to the Heater 5 output on the expansion connector

I think you should double check that with the wiring diagram.

https://duet3d.dozuki.com/Wiki/Duet_Wiring_Diagrams

Macgyver

interesting development

I have updated the grid spacing to 28.5 as suggested in the last output.
I have removed the F switch on the M563 on line 73.

Now the error message has changed substantially

M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Error: Pin name needed for switch-type endstop on Z axis

Pretty sure we are getting close to this.

Macgyver

So I just did the following change, I know that @Phaedrux suggested that I remove the line but I'm trying to understand where this error is being generated from

I removed Line 1
M574 Z1 S1

and replaced it with line 2
M574 Z1 S1 P"!zstop"

Now I am not getting any error at all

M98 P"config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled

I am still getting a solid red light on the BLtouch but no blue at all. My understanding is the blue light is your confirmation the "sig" or yellow wire is functional on the board? that being said if I am correct it's not seeing the "rdy" on the heater5 pin on the EXP connector.

I did double-check the wiring on the EXP and I was off by a pin so that is now confirmed to be in the correct location.

Phaedrux

@macgyver said in Yet another BLtouch problem:

I did double-check the wiring on the EXP and I was off by a pin so that is now confirmed to be in the correct location.

Ok, so now does the deploy and retract work when sending M401 and M402?

Phaedrux

@macgyver said in Yet another BLtouch problem:

M574 Z1 S1 P"!zstop"

This is fine, but if you have no actua endstop connected to the zstop pins you'll end up with more problems if you ever tried to actually home the Z axis with an endstop movement command. (G1 H1 Z)

Macgyver

I've gone the next step, I have a new Duet 2 board, just sitting on my desk, I have moved the firmware over to it and flashed it at 3.3.

Its a little easier to move pins around and troubleshoot with the board on my desk instead of at the bottom of a big ol printer.

I have replicated the current install of the board in the printer and still getting the same symptoms.

I have put an M401 and M402 at the end of my config.g so if the pin deploys and stows 3 times on startup it should be working fine. I have used a new BLtouch, New short harness for the BLtouch.

The only thing I have hooked to it is the BLtouch and an i7 screen. I also wanted to eliminate the possibility that the board is bad in the printer and I think this is the best way to do it.

To give updates, I have tried heater 5,3, and 8. None of them change any of the symptoms. M401 and M402 do not work.

Phaedrux

Can you show your current config and photo of the wiring?

Macgyver

@phaedrux

I think I have it, Kinda

I had a P switch in the M950 instead of S. Below are the lines from my config.g

; Z-Probe
M950 S0 C"exp.8" ; assign GPIO port 0 to heater3/Pin 8 on expansion connector, servo mode
;M950 P0 C"exp.8" ; assign GPIO port 0 to heater3/Pin 8 on expansion connector, servo mode
M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to 9 BL Touch and the dive height + speeds
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X15:585 Y15:585 S28.5 ; define mesh grid

The commented-out line is the old one. Now if I use the 280 command or call the deploy and retract macros they work just fine. Only issue is the M401 and M402 do not work.

Should I be concerned that this is called somewhere else?

Macgyver

Here is the pic as requested, Nothing connected except BLtouch and i7 screen

Now I have the 401 and 402 working, there was an illegal T switch added to the commands in the deployprobe.g and retractprobe.g

Phaedrux

Sounds like you've got it working now?

Macgyver

I would call it working with one exception, When I start the machine and M401 and M402 work, not an issue.

I have everything moved back to the D600 and have the rest of the machine put together. Moved all the firmware over and updated the config. g file with the error I found on the test bench. Kinda a small issue left

When I try to call the G28 it fails on the Z-axis with the error of
G28 Z
Error: Failed to enable endstops

X and Y axis work, not an issue, Pin will not deploy when it starts the Z home, however, the bed does move down 10 mm as expected and requested.

pretty sure this is going to be something in one of the macros, Going to chase it down today. If you have a suggestion where to start looking that would be appreciated.

Phaedrux

It sounds like you just need to update your homeall to use a G30 to use the probe instead of a G1 H1 Z move to use an endstop.

danzaywer

@macgyver
If you want to use probe as endstop then you have to set

M574 Z1 S2                               						    ; Set endstops controlled by probe

and use G30 instead of G1 H1 as @Phaedrux said

engikeneer

@danzaywer
You don't need the M574 line in there. I think the config generator just puts that line in by default but it's not needed (and may actually mean something else if you dig in the docs...)

@Macgyver Just make sure your homing files have a G30 command in like @Phaedrux said

danzaywer

@engikeneer said in Yet another BLtouch problem:

You don't need the M574 line in there. I think the config generator just puts that line in by default but it's not needed (and may actually mean something else if you dig in the docs...)

So can it be omitted?

engikeneer

@danzaywer yes, from the docs for M574 in RRF3:

Snnn 1 = switch-type (eg microswitch) endstop input, 2 = Z probe (when used to home an axis other than Z), 3 = single motor load detection, 4 = multiple motor load detection (see Notes).

I think the intended use of the S2 parameter would be to set your x or y axis to use the z probe as an endstop (like the ormerod printer does). Don't think it does any harm though as it is, which is why it hasn't been taken out from the config tool (though it has caused some confusion for a few people.on here!)

dc42

@engikeneer said in Yet another BLtouch problem:

I think the intended use of the S2 parameter would be to set your x or y axis to use the z probe as an endstop (like the ormerod printer does).

That's correct.

Macgyver

Hi Guys

Sorry for going AWOL on this, unfortunately got Covid but finally back in the office and back on this machine.

Going to work through it and update it shortly.

Macgyver

So after much trying to figure out what's going on with this machine, turns out had a weak spot in one of the ground lines in my BLtouch, It would work sometimes and randomly just not trigger. Ran 5 new lines all from the BLtouch through the drag chain to the mainboard (about 17 ft) and now its working 100% predictability.

Just going to post my configuration here in case others want something to ref that is working. All this is done on RRF 3

Config .g file

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)

; Endstops
M574 X1 S1 P"!xstop" ; configure active-high endstop for low end on X via pin !xstop
M574 Y1 S1 P"!ystop" ; configure active-high endstop for low end on Y via pin !ystop

; Z-Probe
M950 S0 C"exp.8" ; Assign GPIO port 0 to Heater3/Pin8 on exp conn, Servo Mode
M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to 9 BL Touch and the dive height + speeds
G31 P500 X0 Y0 Z6.3 ; set Z probe trigger value, offset and trigger height
M557 X15:585 Y15:585 S28.5 ; define mesh grid

; deployprobe.g
; called to deploy a physical Z probe
M280 P0 S10

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-605 Y-605 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000 ; go back a few mm
G1 H1 X-605 Y-605 F360 ; move slowly to X and Y axis endstops once more (second pass)
G30
G90 ; absolute positioning
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Tue Mar 02 2021 18:05:15 GMT-0500 (Eastern Standard Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G30
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)