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MarlinFirmware / Marlin

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
https://marlinfw.org
GNU General Public License v3.0
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Auto bed leveling bilinear not working #7126

Closed AcroFlax closed 6 years ago

AcroFlax commented 7 years ago

First of all, Marlin version is 1.1.3 The thing is that G28 command homes to center correctly and without a problem. But when it comes to G29 command, it does not work for me. The problem is that G29 does not probe, it goes to all 9 points on the bed, but instead of going down to the bed and probe, it goes up after all locations and thats it. I am using AUTO_BED_LEVELING_BILINEAR. Probe is J18A3-8-Z/AX inductive sensor. If trigger is inverted, G28 wouldn't be able to home, so as G29. I tried disabling double probe, inverting Z axis min stop, nothing helped.

Bob-the-Kuhn commented 7 years ago

Sounds like the system is seeing the probe as always triggered.

Use the M119 command to see what Marlin thinks the state of the probe is. I expect that you'll see it as always triggered.

Bob-the-Kuhn commented 7 years ago

Try turning off the internal pullup on the probe. That's caused the probe to appear as in one state all the time.

If you have Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PINenabled then use the following .

//#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#if DISABLED(ENDSTOPPULLUPS)
  // fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
  #define ENDSTOPPULLUP_XMAX
  #define ENDSTOPPULLUP_YMAX
  #define ENDSTOPPULLUP_ZMAX
  #define ENDSTOPPULLUP_XMIN
  #define ENDSTOPPULLUP_YMIN
  //#define ENDSTOPPULLUP_ZMIN
  //#define ENDSTOPPULLUP_ZMIN_PROBE
#endif

#define Z_MIN_ENDSTOP_INVERTING false
#define Z_MIN_PROBE_ENDSTOP_INVERTING false

If you have Z_MIN_PROBE_ENDSTOPenabled then use the following . 

//#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#if DISABLED(ENDSTOPPULLUPS)
  // fine endstop settings: Individual pullups. will be ignored if ENDSTOPPULLUPS is defined
  #define ENDSTOPPULLUP_XMAX
  #define ENDSTOPPULLUP_YMAX
  #define ENDSTOPPULLUP_ZMAX
  #define ENDSTOPPULLUP_XMIN
  #define ENDSTOPPULLUP_YMIN
  #define ENDSTOPPULLUP_ZMIN
  //#define ENDSTOPPULLUP_ZMIN_PROBE
#endif

#define Z_MIN_PROBE_ENDSTOP_INVERTING false
AcroFlax commented 7 years ago

Solved my problem, with your given advice. Still weird, because when I was using old firmware, which was 1.0.2. I didnt't need to specify or change such parameters :)

Bob-the-Kuhn commented 7 years ago

Glad to see you up & running.

I just looked at 1.0.2.1 & 1.0.2.2 and they both also default to all the endstop pullups being enabled.

Agreed - weird.

davetech commented 7 years ago

I had the same problem with 1.1.4 but I have no problem with 1.1.3. I am using a simple normally closed microswitch.

github-actions[bot] commented 2 years ago

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.