Need Help with BL Touch Set up
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@DIY-O-Sphere thank you for the help. I removed the items on your first reply. The m307 I thought was needed to free up my heater 3 pin. The ^ I got from another post. Ran it with and without and did not seem to make any difference.
I am not sure I follow how I am to make the home.g file. (G30). And yes I get that the bed lowers at the start of a homing action. And it does. But then it lowers again when it should to be moving up and looking for the probe (which is still not deployed). Plus the z movement sounds horrible. Not sure how to upload a video but I have one to share of what home z does. -
@Shamusseven
You can create the files here.
https://configtool.reprapfirmware.org/Start -
I guess my concern is I created all the files using the configurator tool to begin with. So what do I do differently to get the home.g file created.
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@Shamusseven
I am not shure what was going wrong. Some of the attached files are from the RRF2 version.You homeall.g should look like this:
; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Apr 11 2020 15:51:05 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-335 Y-335 F3000 ; 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-335 Y-335 F300 ; move slowly to X and Y axis endstops once more (second pass)
G90 ; absolute positioning
G1 X150 Y150 F6000 ; go to first bed probe point and home Z
G30; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning -
@Shamusseven
Please check the offset of the probe...
G31 P500 X170 Y180 Z2.5
Isn't it mounted in the near of the nozzle? -
so is that to be the placement where the BL touch physically is compared to the Nozzel? because yes it is just a few mm to the rear of the nozzel and about 37mm to the left of the nozzel.
by the way, After making thos changes, I still do not seem to get my probe to deploy excet at power on.here are my configs after changes. homeall (1).g config (1).g
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Plus another thing I noticed is my z motors do not seem to be fully synced. The 2 motors go the same direction But the left side starts just a fraction sooner than the right side. What is causing that?
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@Shamusseven said in Need Help with BL Touch Set up:
Plus another thing I noticed is my z motors do not seem to be fully synced. The 2 motors go the same direction But the left side starts just a fraction sooner than the right side. What is causing that?
Check if the wiring is that way. Especially if you are using extension cables.
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I can look in a bit but it’s wired using the same cables as the original board. And it’s not that they are moving in an opposite way than the other. Just a delay.
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@Shamusseven said in Need Help with BL Touch Set up:
here are my configs after changes. homeall (1).g config (1).g
https://forum.duet3d.com/topic/14183/help-with-new-config-g?_=1586795305711
Try to put "^" back. I will never get it.... -
No change. But yeah. That is where I saw where I needed that. This is so difficult because the process from different versions are different. Frustrating.
But I still do not have my probe deploying
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Hello,
I have same problem two days ago:https://forum.duet3d.com/topic/15549/bl-touch-setting-on-reprap-firmware-3-0
In this topic is part of my config.g which is OK.
And check sd card if you do not have on sd card file iap4e.bin and delete it.
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And I guess the difference in the z motors is just in the transition from the first probe test (which still goes the opposite way) to the second, slower or I assume more accurate measurement. Just at that moment when the bed goes back down for the slower measurement, the left side start sooner. It appears the equal back up so not sure it’s an issue or not.
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sorry you're having a bit of trouble. I think part of the problem is that you're using RRF3 but you've either gotten config files for using 2.x version or used some documentation for 2.x version.
First
@Shamusseven said in Need Help with BL Touch Set up:
because yes it is just a few mm to the rear of the nozzel and about 37mm to the left of the nozzel.
G31 P500 X170 Y180 Z2.5You must change the X and Y values to match the distance between the nozzle and the BLtouch. Also change from P500 to P25.
Here's an example of how to measure it: https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+5:+Upgrades/54#s230
Once you have the probe working, you will need to calibrate the Z trigger height, also described in that link.
You must change your deploy and retract macros to use P0 instead of P3. P0 reserves to servo index 0, which you created with the M950 command in config.g. In 2.x versions the P3 would have referred to the heater 3 pin directly.
M280 P0 S90 I1; retract BLTouchM280 P0 S10 I1; deploy BLTouchSince you are using the BLtouch with a DuetWifi, you will also need the
I1to invert the signal.Your homeall looks fine.
AS for the Z axis direction, 0 is where the nozzle is touching the bed. 400 is when the bed is farthest away from the nozzle. Negative Z movement moves the nozzle and bed closer together, positive Z movement moves them farther apart. If that's not what's happening now, you'll need to change the direction of rotation for the motors on the Z axis.
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@radekzl I removed this file and now I can’t get anything to work.
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@radekzl said in Need Help with BL Touch Set up:
And check sd card if you do not have on sd card file iap4e.bin and delete it.
Do not delete that file. @Shamusseven
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you can redownload the file here if need be: https://github.com/dc42/RepRapFirmware/releases/download/1.21/iap4e.bin
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@Phaedrux said in Need Help with BL Touch Set up:
Since you are using the BLtouch with a DuetWifi, you will also need the I1 to invert the signal.
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Software_setup_RepRapFirmware_Num_3
Create the deployprobe,g and retractprobe.g macros as described for using RepRapFirmware 2. The P value in the M280 commands should be your chosen GPIO/Servo index. You do not need the I1 parameter.
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@DIY-O-Sphere said in Need Help with BL Touch Set up:
@Phaedrux said in Need Help with BL Touch Set up:
Since you are using the BLtouch with a DuetWifi, you will also need the I1 to invert the signal.
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Software_setup_RepRapFirmware_Num_3
Create the deployprobe,g and retractprobe.g macros as described for using RepRapFirmware 2. The P value in the M280 commands should be your chosen GPIO/Servo index. You do not need the I1 parameter.
Thanks. -
@Phaedrux Yes that is one of my frustrations. I started out over the weekend with 2.3 firmware but updated to 3.0. Now that I removed the one file mentioned above and nothing works, what do I do? I can’t even open the config.g file.
