Z Sensors

Tanuki44

Hello,

Usually when I use my printer3D, I have a capacitive sensor set on the heated bed, it is declared on the ENDSTOP_PULLUP_Z_MIN.

<div>I would like to use a other sensor (just a switch) when I use CN as CNC Milling, is't possible without deconnect the capacitive sensor ?
and how to declare in firmware on a other pin?</div><div>This sensor will always be higher (placed on the part) and used with G30 H (xx) R (xx).

Best regards

</div>

Repetier

That way it is not possible. You must use the same pin and both must have the same high signal settings. Then you must deactivate the unused pin.
Alternatively you need to find all usages of the pin (there are not so many) and switch based on the printer mode.

Tanuki44

Thank you for your reply

I will do otherwise, (use a gate 'OR' or an inverter switch)

Tanuki44

G21 ; metric values

G28 ; home

G1 F2400 Z100 ; Z degagement

G30 H20 R0 ; Probing

G1 F200 Z90

Hello,

I must have a problem, but without knowing where ...

In the example:

G30 H(stock height) R0

the probe comes to palpate the top of the stock and goes back to its previous position,

the display on the LCD shows Z0, in Repetier Host the displayed value remains Z100.

At the next command G1, the Z axis goes down completely and the probe hits the bed without stopping.

While the Z value is 90 and the original Z has been redefined, the axis should go up.

But probably I misunderstood of G30 H <> R <> or a bad firmware setting ....

// #################### Z-Probing #####################

#define Z_PROBE_Z_OFFSET 0

#define Z_PROBE_Z_OFFSET_MODE 0

#define UI_BED_COATING 1

#define FEATURE_Z_PROBE 1

#define EXTRUDER_IS_Z_PROBE 0

#define Z_PROBE_DISABLE_HEATERS 0

#define Z_PROBE_BED_DISTANCE 0

#define Z_PROBE_PIN ORIG_Z_MIN_PIN

#define Z_PROBE_PULLUP 0

#define Z_PROBE_ON_HIGH 0

#define Z_PROBE_X_OFFSET 0

#define Z_PROBE_Y_OFFSET 0

#define Z_PROBE_WAIT_BEFORE_TEST 0

#define Z_PROBE_SPEED 20

#define Z_PROBE_XY_SPEED 150

#define Z_PROBE_SWITCHING_DISTANCE 1

#define Z_PROBE_REPETITIONS 1

#define Z_PROBE_USE_MEDIAN 0

#define Z_PROBE_HEIGHT 0

#define Z_PROBE_DELAY 0

#define Z_PROBE_START_SCRIPT ""

#define Z_PROBE_FINISHED_SCRIPT ""

#define Z_PROBE_RUN_AFTER_EVERY_PROBE ""

#define Z_PROBE_REQUIRES_HEATING 0

#define Z_PROBE_MIN_TEMPERATURE 150

#define FEATURE_AUTOLEVEL 1

#define FEATURE_SOFTWARE_LEVELING 0

Regards

Repetier

Forget host in this context, Host does not know about this and will show real global coordinates as it assumes you have set. It does not know about the G30 offset change. Important is what M114 returns and what printer lcd shows.

- G30 H<height> R<offset> Make probe define new Z and z offset (R) at trigger point assuming z-probe measured an object of H height.

Usage seems correct. You say object hit by z probe is H=20mm height and there it should assume z=0 so that you can go down until Z=-20. Being back I'd expect to see a value around 80mm on lcd.

So starting from that what does lcd show for Z after G30?

G28 ; home

G1 F2400 Z100 ; Z degagement

G30 H20 R0 ; Probing

How does this work? I mean where do you home as I do not see the move to the object. If you do not hit the object with height 20mm you can go through the bed.

Tanuki44

Yes, you're right, the display on the LCD should indicate 80 but after the G30, it says 0 ...

the log after the G30:

Z-probe : NAN X:0 Y:0
After the M114:
X:0 Y:0 Z:NAN E:0
So even though it's perfectly detecting the piece, Z does not seem to have memorized the value...
I'm using firmware 1.0.3, do you want the full Configuration.h?

Repetier

The problem here is surely the NAN. So question is where this comes from. Computing with this number never makes sense and only adds problems. So I'd say there is something wrong.

Can you show log for simple G30 and your G30 including all ack/command messages. Maybe I get an idea where it comes from. Also check eeprom - I guess one of the z probe related variables is not defined good and has NaN in eeprom causing this.

RAyWB

@Repetier

seems it doesn´t set correct G92 Offset , same situation in V2.

unfortunately too busy today, will search on weekend

RAyWB

Think i found the problem:

in the g30 section

V2 actual:

Motion1::g92Offsets[Z_AXIS] = o - h;
Motion1::currentPosition[Z_AXIS] = z + h + Motion1::minPos[Z_AXIS];
Motion1::updatePositionsFromCurrent();
Motion1::setAxisHomed(Z_AXIS, true);

V2 NEW
Motion1::g92Offsets[Z_AXIS] = z + o - h;
Motion1::g92Offsets[Z_AXIS] -= Motion1::currentPosition[Z_AXIS] ;
Motion1::updatePositionsFromCurrent();
Motion1::setAxisHomed(Z_AXIS, true);

this calculates the correct g92 offset and z position.

Motion1::minPos[Z_AXIS] is not necessary as we refer to workpiece not to zmin of machine

for V1 that should match:

actual: Printer::coordinateOffset[Z_AXIS] = o - h;
Printer::currentPosition[Z_AXIS] = Printer::lastCmdPos[Z_AXIS] = z + h + Printer::zMin;
Printer::updateCurrentPositionSteps();
Printer::setZHomed(true);

new:
Printer::coordinateOffset[Z_AXIS] = z + o - h;
Printer::coordinateOffset[Z_AXIS] -= Printer::currentPosition[Z_AXIS];
Printer::updateCurrentPositionSteps();
Printer::setZHomed(true);

i tested the code only on V2 as i have no V1 running

@Tanuki44 : can you check it on your system? at least it´s just 2 lines to change

@Repetier

I´ll send an e-mail with the actual state mods on V2 ( the Typo on axis setup , the bluetooth fix and this one)

maybe you´ll find the time to update gihub branch

Tanuki44

Ok no problem, I test this and return feedback

Tanuki44

With the modification of the 2 lines, the operation of G92 seems correct
<div>G21</div><div>G28</div><div>G1 F2400 Z100</div><div>G92 Z0 ; redefined Z0 but display LCD = Z:100</div>

G1 F1000 Z-50 ; the Z axis goes down 50mm display LCD = Z:50
G1 F1000 Z5 ; the axis goes to the new Z5 display LCD = Z:105

About G30:
G21

G28

G1 F2400 Z100

G30 H20 R0

After G30 H20 R0, now the display LCD no longer shows Z0, but Z100 and still not 80.
and always Z: NAN X: 0 Y: 0
G0 or G1 has no action

The Eeprom:

<?xml version="1.0" encoding="utf-8"?><Repetier-Firmware-EEPROM><epr pos="1028" type="0" value="7">Language</epr>

<epr pos="75" type="2" value="115200">Baudrate</epr>

<epr pos="129" type="3" value="191.541">Filament printed</epr>

<epr pos="125" type="2" value="395802">Printer active</epr>

<epr pos="79" type="2" value="0">Max. inactive time</epr>

<epr pos="83" type="2" value="360000">Stop stepper after inactivity</epr>

<epr pos="3" type="3" value="200.0000">X-axis steps per mm</epr>

<epr pos="7" type="3" value="200.0000">Y-axis steps per mm</epr>

<epr pos="11" type="3" value="400.0000">Z-axis steps per mm</epr>

<epr pos="15" type="3" value="100.000">X-axis max. feedrate</epr>

<epr pos="19" type="3" value="100.000">Y-axis max. feedrate</epr>

<epr pos="23" type="3" value="40.000">Z-axis max. feedrate</epr>

<epr pos="27" type="3" value="40.000">X-axis homing feedrate</epr>

<epr pos="31" type="3" value="40.000">Y-axis homing feedrate</epr>

<epr pos="35" type="3" value="10.000">Z-axis homing feedrate</epr>

<epr pos="145" type="3" value="280.000">X max length</epr>

<epr pos="149" type="3" value="290.000">Y max length</epr>

<epr pos="153" type="3" value="190.000">Z max length</epr>

<epr pos="1056" type="3" value="-100.000">Park position X</epr>

<epr pos="1060" type="3" value="20.000">Park position Y</epr>

<epr pos="1064" type="3" value="20.000">Park position Z raise</epr>

<epr pos="51" type="3" value="200.000">X-axis acceleration</epr>

<epr pos="55" type="3" value="200.000">Y-axis acceleration</epr>

<epr pos="59" type="3" value="10.000">Z-axis acceleration</epr>

<epr pos="63" type="3" value="200.000">X-axis travel acceleration</epr>

<epr pos="67" type="3" value="200.000">Y-axis travel acceleration</epr>

<epr pos="71" type="3" value="200.000">Z-axis travel acceleration</epr>

<epr pos="1032" type="3" value="100.000">Acceleration factor at top</epr>

<epr pos="1024" type="3" value="0.000">Coating thickness</epr>

<epr pos="808" type="3" value="0.000">Z-probe height</epr>

<epr pos="929" type="3" value="0.000">Max. z-probe - bed dist.</epr>

<epr pos="812" type="3" value="2.000">Z-probe speed</epr>

<epr pos="840" type="3" value="150.000">Z-probe x-y-speed</epr>

<epr pos="800" type="3" value="0.000">Z-probe offset x</epr>

<epr pos="804" type="3" value="0.000">Z-probe offset y</epr>

<epr pos="816" type="3" value="130.000">Z-probe X1</epr>

<epr pos="820" type="3" value="0.000">Z-probe Y1</epr>

<epr pos="824" type="3" value="130.000">Z-probe X2</epr>

<epr pos="828" type="3" value="0.000">Z-probe Y2</epr>

<epr pos="832" type="3" value="130.000">Z-probe X3</epr>

<epr pos="836" type="3" value="0.000">Z-probe Y3</epr>

<epr pos="1036" type="3" value="0.000">Z-probe bending correction A</epr>

<epr pos="1040" type="3" value="0.000">Z-probe bending correction B</epr>

<epr pos="1044" type="3" value="0.000">Z-probe bending correction C</epr>

<epr pos="1048" type="1" value="85">Bed Preheat temp.</epr>

<epr pos="106" type="0" value="3">Bed Heat Manager</epr>

<epr pos="107" type="0" value="230">Bed PID drive max</epr>

<epr pos="124" type="0" value="80">Bed PID drive min</epr>

<epr pos="120" type="0" value="255">Bed PID max value</epr>

<epr pos="200" type="3" value="370.000">Extr.1 steps per mm</epr>

<epr pos="204" type="3" value="800.000">Extr.1 max. feedrate</epr>

<epr pos="208" type="3" value="400.000">Extr.1 start feedrate</epr>

<epr pos="212" type="3" value="400.000">Extr.1 acceleration</epr>

<epr pos="294" type="1" value="235">Extr.1 Preheat temp.</epr>

<epr pos="216" type="0" value="1">Extr.1 heat manager</epr>

<epr pos="217" type="0" value="230">Extr.1 PID drive max</epr>

<epr pos="245" type="0" value="40">Extr.1 PID drive min</epr>

<epr pos="230" type="0" value="255">Extr.1 PID max value</epr>

<epr pos="231" type="2" value="0">Extr.1 X-offset</epr>

<epr pos="235" type="2" value="0">Extr.1 Y-offset</epr>

<epr pos="290" type="2" value="0">Extr.1 Z-offset</epr>

<epr pos="239" type="1" value="1">Extr.1 temp. stabilize time</epr>

<epr pos="250" type="1" value="150">Extr.1 temp. for retraction when heating</epr>

<epr pos="252" type="1" value="0">Extr.1 distance to retract when heating</epr>

<epr pos="254" type="0" value="255">Extr.1 extruder cooler speed</epr>

<epr pos="300" type="3" value="370.000">Extr.2 steps per mm</epr>

<epr pos="304" type="3" value="800.000">Extr.2 max. feedrate</epr>

<epr pos="308" type="3" value="400.000">Extr.2 start feedrate</epr>

<epr pos="312" type="3" value="400.000">Extr.2 acceleration</epr>

<epr pos="394" type="1" value="235">Extr.2 Preheat temp.</epr>

<epr pos="316" type="0" value="1">Extr.2 heat manager</epr>

<epr pos="317" type="0" value="230">Extr.2 PID drive max</epr>

<epr pos="345" type="0" value="40">Extr.2 PID drive min</epr>

<epr pos="330" type="0" value="255">Extr.2 PID max value</epr>

<epr pos="331" type="2" value="0">Extr.2 X-offset</epr>

<epr pos="335" type="2" value="0">Extr.2 Y-offset</epr>

<epr pos="390" type="2" value="0">Extr.2 Z-offset</epr>

<epr pos="339" type="1" value="1">Extr.2 temp. stabilize time</epr>

<epr pos="350" type="1" value="150">Extr.2 temp. for retraction when heating</epr>

<epr pos="352" type="1" value="0">Extr.2 distance to retract when heating</epr>

<epr pos="354" type="0" value="255">Extr.2 extruder cooler speed</epr>

</Repetier-Firmware-EEPROM>

Tanuki44

For G30 H20 R0 :

17:36:13.078 : T:16.00 /0 B:16.00 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:16.00 /0 @1:0

17:36:13.296 : wait

17:36:13.718 : N21 G30 R0 H20*1

17:36:13.718 : ok 21

17:36:14.203 : T:16.00 /0 B:16.00 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:15.80 /0 @1:0

17:36:15.312 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:16.00 /0 @1:0

17:36:15.718 : busy:processing

17:36:16.375 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:16.00 /0 @1:0

17:36:17.468 : T:16.00 /0 B:16.00 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:15.80 /0 @1:0

17:36:17.718 : busy:processing

17:36:18.578 : T:16.00 /0 B:16.20 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:16.00 /0 @1:0

17:36:19.000 : Z-probe:NAN X:-140.00 Y:-150.00

17:36:19.000 : wait

17:36:19.671 : T:16.00 /0 B:16.00 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:16.00 /0 @1:0

17:36:20.000 : wait

Tanuki44

For simple G30 :

17:33:00.187 : wait

17:33:00.859 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:15.80 /0 @1:0

17:33:01.078 : N16 G30*45

17:33:01.078 : ok 16

17:33:01.968 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:15.80 /0 @1:0

17:33:03.062 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:15.80 /0 @1:0

17:33:03.078 : busy:processing

17:33:04.156 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:15.80 /0 @1:0

17:33:05.078 : busy:processing

17:33:05.265 : T:15.80 /0 B:16.00 /0 B@:0 @:0 T0:15.80 /0 @0:0 T1:16.00 /0 @1:0

17:33:06.312 : Z-probe:NAN X:-140.00 Y:-150.00

17:33:06.312 : wait

17:33:06.359 : T:16.00 /0 B:16.00 /0 B@:0 @:0 T0:16.00 /0 @0:0 T1:15.80 /0 @1:0

17:33:07.312 : wait

Thanks for your help !

RAyWB

think the problem is the NAN but from upper posts i cannot see whats wrong.

did you look at eeprom contents with repetier host eeprom editor?

may be the NAN is indicated somewhere.

regarding LCD : it shows machine coords , not the corrected ones so i guess you are in mode FFF

which Firmware version do you use?

Tanuki44

I use the 'Firmware EEPROM Configuration' in the 'Config' Menu.
I exported the content, see post from 5:15Pm ... I'm not see anormal anything...
I use the 1.0.3 version.
I have tested in FFF and CNC mode, it's same...

NAN ... I think like you, the value is either not calculated or not memorized, how to know?

I use the same sensor for z_min and Z_probe...

RAyWB

in cnc mode you should have machine coordinates on one side and g92 corrected coordinates on the other side

see: https://forum.repetier.com/discussion/2033/display-for-laser-cnc-mode/p1</div><div><br/></div><div>can you post( better upload somewhere) your configuration.h so i´ll try your setup on my machine

may be the same sensor for z_min and Z_probe makes the difference , i home to z-max , as usual in cnc

but the unwanted moves (crashing into bed) are fixed , correct?

RAyWB

look at this, thats not correct :

<epr pos="816" type="3" value="130.000">Z-probe X1</epr>

<epr pos="820" type="3" value="0.000">Z-probe Y1</epr>

<epr pos="824" type="3" value="130.000">Z-probe X2</epr>

<epr pos="828" type="3" value="0.000">Z-probe Y2</epr>

<epr pos="832" type="3" value="130.000">Z-probe X3</epr>

<epr pos="836" type="3" value="0.000">Z-probe Y3</epr>

you have same coords for all 3 measuring points

try f.e. :

x1 100 y1 20

x2 150 y2 20

x3 125 y3 70

the three points have to define a triangle

refer: https://www.repetier.com/documentation/repetier-firmware/z-probing/<br/></div><br/>

Tanuki44

In fact, I do not really use the FEATURE_AUTOLEVEL, it is activated but I probe only one point, I should rather put FEATURE_AUTOLEVEL = 0, but is this important? ...

I will look more precisely (display-for-laser-cnc-mode) and I will post the configuration.h

I'm using the z_min in FFF mode (printer DIY) ... and when I look BedLeveling.cpp, the reference is z_max...

As I understand my professional CNC work with the sensor in Z_max.

Is it possible in CNC mode to use the z_max sensor and to keep the z_min in FFF mode or to switch to z_max?

Thanks for your help

RAyWB

"and when I look BedLeveling.cpp, the reference is z_max..."

you have zmax here:

<epr pos="153" type="3" value="190.000">Z max length</epr>

it does not depend on homing direction.

so may be you give the 3 different points a try , may be it helps isolate the error

Tanuki44

I looked the CNC mode, the values are well indicated and correct after the G92 Z0.

Good work ;)

Here is the link for the Confiiguration.h file

https://1drv.ms/u/s!AlGMbs83UEm4gYg4vznCabw2tAsXfA

The values of EEprom are in the post above.

If G30 does not work, I can use the G92 to set the probe height offset in the gcode.