Z probe state not being read with 0.92.3 on Sanguinololu

slip

Hello,

I am trying to set up my Delta printer and I am having trouble with the Z-probe state. I first tried firmware version 0.91 and I got the printer was working. Z-probe state is read as L or H as appropriate. I followed the instructions here http://www.repetier.com/documentation/repetier-firmware/z-probing/ to set up the bed levelling (I wanted to test a stable version first). The instructions explain that you need version 0.92.X because of bugs in the auto levelling code.

After I was confident that my printer was working I wanted to try the distortion compensation, so I downloaded firmware version 0.92.3. The configuration files match, except for new values. When I use G31 with 0.92.3 the printer returns "Z-probe state:" with no status.

I have tried comparing source files to see if there was a simple error, but as I'm not familiar with the Repetier firmware source code and there are a lot of changes between 0.91 and 0.92.X my investigation was much in vein.

My set up is as follows:

- Repetier 0.92.3 on a Sanguinololu with ATMega1284P.

- Repetier host 1.0.6

- Z probe pin is 16

Here is some log output to show the difference in the two firmware versions tested.

13:27:11.368 : FIRMWARE_NAME:Repetier_0.91 FIRMWARE_URL:https://github.com/repetier/Repetier-Firmware/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:Delta EXTRUDER_COUNT:1 REPETIER_PROTOCOL:2

13:27:11.370 : Printed filament:0.00m Printing time:0 days 0 hours 0 min

13:27:11.377 : X:0.00 Y:0.00 Z:0.00 E:0.00

13:27:13.960 : Z-probe state:L

13:28:07.545 : No start signal detected - forcing start

13:28:07.568 : FIRMWARE_NAME:Repetier_0.92.3 FIRMWARE_URL:https://github.com/repetier/Repetier-Firmware/ PROTOCOL_VERSION:1.0 MACHINE_TYPE:Delta EXTRUDER_COUNT:1 REPETIER_PROTOCOL:3

13:28:07.570 : Printed filament:0.00m Printing time:0 days 0 hours 0 min

13:28:07.574 : X:0.00 Y:0.00 Z:0.000 E:0.0000

13:28:07.576 : Unknown command:N7 M20

13:28:08.912 : Z-probe state:

I'd be happy to provide any more information necessary.

tbaggins

I was having the same problem. 

- Repetier 0.92.3 on a Ramps 1.4 with Mega 2856

- Repetier host 1.0.6

- Z probe pin is 3, I have also tried pin 18, which was the original that was working before firmware switch. I tested the z-probe for continuity, it is working.

In commands.cpp, the previous firmware that was working went from this code:

case 31:  // G31 display hall sensor output

        Com::printF(Com::tZProbeState);

        Com::print(Printer::isZProbeHit() ? 'H' : 'L');

        Com::println();

        break;

to this in the non-working firmware:

case 31:  // G31 display hall sensor output

        Endstops::update();

        Endstops::update();

        Com::printF(Com::tZProbeState);

        Com::print(Endstops::zProbe() ? Com::tHSpace : Com::tLSpace);

        Com::println();

        break;

A workaround if you want it to tell you what is going on until someone fixes it:

Open Repetier.INO in arduino, select the commands.cpp tab, 

CTRL-F to find, search for "case 31"

Replace

Com::print(Endstops::zProbe() ? Com::tHSpace : Com::tLSpace);

with 

Com::print(Endstops::zProbe() ? 'H' : 'L' );

Hope that helps. It worked for me. Now I need to see if it works with the z-probing, because z-probing was not working correctly last night. It was stopping far above the bed and during bed mapping, the printer returned to the home position after every probe.

Repetier

Ok, just found out why it worked for me. I'm using 32 bit due for testing and 

Com::print(Endstops::zProbe() ? Com::tHSpace : Com::tLSpace);

shoudl be

Com::printF(Endstops::zProbe() ? Com::tHSpace : Com::tLSpace);

so it reads from flash for AVR. On due it makes no difference. 

Just updated sources.

slip

Thank you both very much for your responses. I took so long to respond because I have been away all weekend.

Both fixes work and I'm now correctly reading the state with G31.

Edit: corrected typo "not" to "now"