Posts made by rudenick

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But if the probe always meets the same bed temperature - the variance is constant right?
Thermistor is there to correct the non-constant bed temperatures to keep the same offset between 60 and 90C but I'm using only one

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@dc42 Hope it is a worthwhile bother. I'm at the wits end with configuring duet for my ender 3 and pinda probe since May.

The Z offset is inconsistent and two Z axis true leveling is inconsistent as well.

I have replaced the springs with PCABS washers.
Probe measures at static 60C
Z rod distances, bed size, probe to nozzle distances are correct.
Z motor order and cabling is correct.

Please, please help

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Duet software turns out to be very difficult to be made to work despite doing everything like the guides said.

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Yes but as I use 60C always - It's safe dependable value. Using temperature offsets would just add another fail point and would not impact anything that is failing currently

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@Phaedrux I printed a 2cm washers in PCABS and replaced the springs with them. Magnetic bed holds to the bed.

At first it worked but I started to have hardware/connection issues with temperature sensor in pinda probe. I never used temp corretion, I thought it is not available.

I always use 60C temp for homing and printing unless I use PCABS but that's not in the equation/files right now.

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If at least I could home onice:

25/09/2020, 07:54:49	G28
Leadscrew adjustments made: 0.052 -0.048, points used 2, (mean, deviation) before (0.005, 0.029) after (0.000, 0.000)
Stopped at height 0.590 mm
Stopped at height 0.540 mm

Error: Homing failed
25/09/2020, 07:47:56	G28
Leadscrew adjustments made: 0.096 -0.089, points used 2, (mean, deviation) before (0.010, 0.054) after (0.000, 0.000)
Stopped at height 0.595 mm
Stopped at height 0.515 mm

Error: Homing failed
25/09/2020, 07:45:14	G28
Leadscrew adjustments made: 0.164 -0.158, points used 2, (mean, deviation) before (0.014, 0.094) after (0.000, 0.000)
Stopped at height 0.647 mm
Stopped at height 0.505 mm

Error: Homing failed
25/09/2020, 07:42:46	G28
Leadscrew adjustments made: 0.379 -0.333, points used 2, (mean, deviation) before (0.048, 0.209) after (0.000, 0.000)
Stopped at height 0.908 mm
Stopped at height 0.675 mm

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I also have a trouble with changing Z offset, one week it's 2mm lower and after few prints it goes 2mm up while I'm consistent with the procedure and it is persistent on restarts.

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Full config.g

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"Ender1"                                 ; set printer name

; Network
;M552 S0                                        ; disable network

; Drives
M569 P0 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 0 goes backwards using TMC220x driver timings
M569 P1 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 1 goes backwards using TMC220x driver timings
M569 P2 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 2 goes forwards using TMC220x driver timings
M569 P3 S0 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
M569 P4 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
;M569 P0 S0                                     ; physical drive 0 goes forwards using default driver timings
;M569 P1 S0                                     ; physical drive 1 goes forwards using default driver timings
;M569 P2 S1                                     ; physical drive 2 goes forwards using default driver timings
;M569 P3 S0                                     ; physical drive 3 goes forwards using default driver timings

M584 X0 Y1 Z2:4 E3                               ; set drive mapping
M350 X16 Y16 Z16 E32 I1 					   ; configure microstepping with interpolation 
M92 X80.00 Y80.00 Z400 E194.68                   ; set steps per mm 210.00 without m350
M566 X1200.00 Y1200.00 Z24.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00            ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1000 I30                   ; set motor currents (mA)
M572 D0 S0.42                                 ; set pressure advance for direct drive
M84 S30                                        ; Set idle timeout

;dual z axis limits                             ;TO BE CORRECTED
M671 X-30:260 Y115:115 S1                        ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
;M208 X45:195 Y30:185                            ; X carriage moves from -5 to 205, Y bed goes from 0 to 200

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X252 Y230 Z230 S0                         ; set axis maxima

; 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
M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop

; Z-Probe PINDA
M558 P5 C"probe" H3 F120 T6000 A20 S0.005     ; PINDA
;M308 S2 P"e1temp" A"PINDA" Y"thermistor" T100000 B3950 ; PINDA TEMP OK
G31 P100 X-35 Y-4 ;Z0.540
M557 Y20:220 X19:215 P9                        ; define mesh grid OK



; Heaters
M140 H0                                        ; remap heated bed to heater 0
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bed" T0                              ; create bed heater output on bed and map it toensor 0
M143 H0 S110                                    ; set temperature limit for heater 0 to 150C
M307 H0 A149.8 C505.7 D0.3 S1.0 V0.0 B0      ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H0 S90

M308 S1 P"e0temp" Y"thermistor" T100000 B4092  ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S265                                   ; set temperature limit for heater 1 to 275C
M307 H1 A348.1 C142.2 D5.1 S1.0 V0.0 B0        ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H1 S260


; Fans
M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"e1heat" Q500                         ; create fan 1 on pin e1heat and set its frequency
M106 P1 H1 T40 S255                           ; set fan 1 value. Speed is set to 255. Thermostatic control is off




; Tools
M563 P0 D0 H1 F0                               ; define tool 0
;G10 P0 X0 Y-13 Z-0.80                                ; set tool 0 axis offsets
G10 P0 X0 Y-13 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
T0                                             ; select first tool

full homeall.g

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
M190 S60           ; set temp to 60
G1 H1 X-240 Y-240 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-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 X160 Y115 F3000      ; put head over the centre of the bed, or wherever you want to probe
G30 F240                ; lower head, stop when probe triggered and set Z to trigger height
G90                     ; back to absolute mode
G1 H2 X0 Y0 Z20 F6000   ; Go to home position
G32
G31 Z0.498 ;Z0.540
;G29 S1
G28 Z

full bed.g

G30 P0 X20 Y115 Z-99999 ; probe near a leadscrew, half way along Y axis
G30 P1 X190 Y115 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
G28 Z


G90 ; absolute mode
G1 Z5
G1 X40 Y115 F6000 ; put head over the mid left corner
G1 Z0
G91 ; relative mode
G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G30 S-1; lower head, stop when probe triggered and report the value

G90 ; absolute mode
G1 Z5
M564 S0
G1 X250 Y115 F6000 ; put head over the mid right corner
M564 S1
G91 ; relative mode
G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G30 S-1; lower head, stop when probe triggered and report the value

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@Phaedrux said in G32 Dual Z axis constant 0.6mm off-level difference:

You should set the trigger height in config.g and leave it there. You haven't posted your config so I don't know what your trigger height is set there, but if it's different than 0.540 then you're going to have some problems.

I started getting fine leveling results precisely because I moved it from config.g so G32 works without it. How do I get better measurements with Z offset in there? (they were scattered and inconsistent. I got the motors in the right order.

At least now they get more even but still I need to home it few times

25/09/2020, 07:54:49	G28
Leadscrew adjustments made: 0.052 -0.048, points used 2, (mean, deviation) before (0.005, 0.029) after (0.000, 0.000)
Stopped at height 0.590 mm
Stopped at height 0.540 mm

Error: Homing failed
25/09/2020, 07:47:56	G28
Leadscrew adjustments made: 0.096 -0.089, points used 2, (mean, deviation) before (0.010, 0.054) after (0.000, 0.000)
Stopped at height 0.595 mm
Stopped at height 0.515 mm

Error: Homing failed
25/09/2020, 07:45:14	G28
Leadscrew adjustments made: 0.164 -0.158, points used 2, (mean, deviation) before (0.014, 0.094) after (0.000, 0.000)
Stopped at height 0.647 mm
Stopped at height 0.505 mm

Error: Homing failed

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After I push emergency stop and run homeall.g

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
M190 S60           ; set temp to 60
G1 H1 X-240 Y-240 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-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 X160 Y115 F3000      ; put head over the centre of the bed, or wherever you want to probe
G30 F240                ; lower head, stop when probe triggered and set Z to trigger height
G90                     ; back to absolute mode
G1 H2 X0 Y0 Z20 F6000   ; Go to home position
G32
G31 Z0.540
G29 S1
G28 Z

I get fine results:

G28
Stopped at height 0.815 mm
Stopped at height 0.690 mm
Leadscrew adjustments made: 0.139 -0.349, points used 2, (mean, deviation) before (-0.088, 0.143) after (-0.000, 0.000)
Stopped at height 0.730 mm
Stopped at height 0.770 mm

But it is ridiculous. Limiting use.

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TL;DR I found one of the the culprits, It's the Z offset in the G31 command but I don't know what to do - I need this offset.

G31 P100 X-35 Y-4 ;Z0.540

@Phaedrux I print 19cm wide things along x axis - Sag causes 1mm difference unless I adjust the bed. But I need the parts to be accurate. The first layer prints well on one side and on the other not.

Results I got are actually false and it was my mechanical fault. Here are the new results. @Veti @peter247

Here is a result with Z offset:

G32
Stopped at height 0.533 mm
Stopped at height 0.598 mm
Leadscrew adjustments made: -0.018 -0.240, points used 2, (mean, deviation) before (-0.121, 0.065) after (0.000, 0.000)
Stopped at height 0.502 mm
Stopped at height 0.647 mm

And here without Z offset:

G28
Stopped at height 0.842 mm
Stopped at height 0.642 mm
Leadscrew adjustments made: 0.180 -0.393, points used 2, (mean, deviation) before (-0.087, 0.168) after (-0.000, 0.000)
Stopped at height 0.783 mm
Stopped at height 0.755 mm

The second issue is that consecutive G32's unlevel the bed but I'm sure I have correctly configured and wired which axis is left and which is right (I also tried switching them but that did not work):

24/09/2020, 20:23:13	G32
Stopped at height 0.632 mm
Stopped at height 0.837 mm
Leadscrew adjustments made: -0.096 -0.164, points used 2, (mean, deviation) before (-0.127, 0.020) after (0.000, 0.000)
Stopped at height 0.632 mm
Stopped at height 0.865 mm
24/09/2020, 20:21:28	G32
Stopped at height 0.665 mm
Stopped at height 0.815 mm
Leadscrew adjustments made: -0.054 -0.177, points used 2, (mean, deviation) before (-0.111, 0.036) after (0.000, 0.000)
Stopped at height 0.632 mm
Stopped at height 0.837 mm
24/09/2020, 20:19:11	G32
Stopped at height 0.712 mm
Stopped at height 0.798 mm
Leadscrew adjustments made: 0.006 -0.188, points used 2, (mean, deviation) before (-0.084, 0.057) after (0.000, 0.000)
Stopped at height 0.658 mm
Stopped at height 0.815 mm
24/09/2020, 20:14:54	G32
Stopped at height 0.752 mm
Stopped at height 0.725 mm
Leadscrew adjustments made: 0.070 -0.286, points used 2, (mean, deviation) before (-0.096, 0.104) after (0.000, 0.000)
Stopped at height 0.690 mm
Stopped at height 0.772 mm

Maybe G28 does it well, Ill test it.
I added G31 Z0.540 to the homeall.g from config.g maybe that will help.

What do you think?

EDIT: Fixed formatting.

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I'm trying to get dual axis leveling to work. It seems I'm doing everything right according to the duet wiki but I constantly get 0.6mm difference between sides. I tried various alternative x and y inputs with no meaningful difference to the result.
I tried to get this to work past 3 months, please help.

RRF3, Cartesian Ender3

config.g

M584 X0 Y1 Z2:4 E3                                                   ; set drive mapping
M350 X32 Y32 Z32 E32 I1                                         ; configure microstepping with interpolation 
M92 X160.00 Y160.00 Z800 E194.68                      ; set steps per mm 210.00 without m350
M566 X1200.00 Y1200.00 Z24.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00            ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1000 I30                           ; set motor currents (mA)
M572 D0 S0.42                                                          ; set pressure advance for direct drive
M84 S30                                                                     ; Set idle timeout

;dual z axis limits                          
M671 X-30:260 Y115:115 S0.5                                ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
M208 X45:195 Y30:185                                            ; X carriage moves from -5 to 205, Y bed goes from 0 to 200

bed.g

G30 P0 X18 Y115 Z-99999 ; probe near a leadscrew, half way along Y axis
G30 P1 X210 Y115 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
G28 Z

As I probe the bed after G32 I get the result:
G32

Leadscrew adjustments made: -0.077 0.164, points used 2, (mean, deviation) before (0.043, 0.054) after (-0.000, 0.000)
Stopped at height 0.484 mm
Stopped at height 0.426 mm
17/09/2020, 13:04:45

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Thank you! setting Y115 worked. I still have issues with inconsistent Z leveling, different order of commands seems to give diffierent results.

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Hello,

After G32 command the nozzle at the beginning of the x axis is +0.05 off the bed and at the end of the x axis is -0.10

Mesh bed leveling sees the gantry sag before G32. After the G32 command it does not see the sag but it's there.

I'm using Ender 3
left leadscrew is 30mm to the left of the nozzle x0
right leadscrew is 30mm to the right of the nozzle x230 (axis limit)

Here is my related config.g

;dual z axis limits                             
M671 X-30:260 Y0:0 S2                        ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
;M208 X10:190 Y30:230                            ; X carriage moves from -5 to 205, Y bed goes from 0 to 200

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X230 Y230 Z230 S0                         ; set axis maxima

; Z-Probe PINDA
M558 P5 C"probe" H3 F300 T6000 A20 S0.005     ; PINDA
;M308 S2 P"e1temp" A"PINDA" Y"thermistor" T100000 B3950 ; PINDA TEMP OK
G31 P1000 X-41 Y23 Z0.9
;G31 P100 X-41 Y23 Z0.585
M557 Y45:195 X30:185 P9                        ; define mesh grid OK

; Tools
M563 P0 D0 H1 F0                               ; define tool 0
;G10 P0 X0 Y13 Z-0.80                                ; set tool 0 axis offsets
G10 P0 X0 Y13 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C

and my bed.g

G30 P0 X18 Y115 Z-99999 ; probe near a leadscrew, half way along Y axis
G30 P1 X210 Y115 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
G28 Z

Where are my mistakes?

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I changed the M92 Z400 to M92 Z221 and it seems allright but I would appreciate helping me understand the situation

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; Configuration file for SKR v1.4 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.4 on Wed Apr 22 2020 19:45:44 GMT+0200 (Central European Summer Time)

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"Ender1"                                 ; set printer name

; Network
M552 S0                                        ; disable network

; Drives
M569 P0 S0 T0.1:0.1:0.02:0.02                  ; physical drive 0 goes backwards using TMC220x driver timings
M569 P1 S0 T0.1:0.1:0.02:0.02                  ; physical drive 1 goes backwards using TMC220x driver timings
M569 P2 S1 T0.1:0.1:0.02:0.02                  ; physical drive 2 goes forwards using TMC220x driver timings
M569 P3 S0 T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
M584 X0 Y1 Z2 E3                               ; set drive mapping
M92 X80.00 Y80.00 Z133.00 E96.50                ; set steps per mm
M566 X1200.00 Y1200.00 Z24.00 E300.00          ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00          ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30                   ; set motor currents (mA)
M84 S30                                        ; Disable motor idle current reduction

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X235 Y235 Z260 S0                         ; set axis maxima

; 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
M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop

; Z-Probe
M558 P0 H5 F120 T6000                          ; disable Z probe but set dive height, probe speed and travel speed
M557 X15:215 Y15:195 S20                       ; define mesh grid

; Heaters
M140 H0                                        ; remap heated bed to heater 0
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bed" T0                              ; create bed heater output on bed and map it to sensor 0
M143 H0 S80                                    ; set temperature limit for heater 0 to 150C
M307 H0 M307 H0 A79.8 C282.4 D1.3 S1.0 V0.0 B0 ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H0 S55

M308 S1 P"e0temp" Y"thermistor" T100000 B4092  ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S250                                   ; set temperature limit for heater 1 to 275C
M307 H1 A366.5 C138.0 D4.2 S1.0 V0.0 B0        ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H1 S250

;Tuning results
;4/29/2020, 1:52:19 PM 	M307 H0
;Heater 0 model: gain 340.0, time constant 140.0, dead time 5.5, max PWM 1.00, calibration voltage 0.0, mode PID
;Computed PID parameters for setpoint change: P13.4, I0.482, D51.4
;Computed PID parameters for load change: P13.4, I0.949, D51.4
;4/29/2020, 1:52:04 PM 	M307 H1
;Heater 1 model: gain 365.3, time constant 135.6, dead time 1.6, max PWM 1.00, calibration voltage 0.0, mode PID
;Computed PID parameters for setpoint change: P40.7, I2.738, D46.4
;Computed PID parameters for load change: P40.7, I7.255, D46.4


; Heaters alternative
;M140 H0                                        ; remap heated bed to heater 0
;M308 S0 P"bedtemp" Y"thermistor" T98801 B4185 ; configure sensor 0 as thermistor on pin bedtemp
;M950 H0 C"bed" T0                          ; create bed heater output on e1heat and map it to sensor 0
;M143 H0 S80                                 ; set temperature limit for heater 0 to 80C
;M307 H0 B0 S1.00                              ; disable bang-bang mode for the nozzle heater and set PWM limit
;M308 S1 P"e0temp" Y"thermistor" T98801 B4185  ; configure sensor 1 as thermistor on pin e0temp
;M950 H1 C"e0heat" T1                          ; create nozzle heater output on e0heat and map it to sensor 1
;M143 H1 S250                                  ; set temperature limit for heater 1 to 260C
;M307 H1 B0 S1.00                              ; disable bang-bang mode for the nozzle heater and set PWM limit


; Fans
M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H1 T45                              ; set fan 0 value. Thermostatic control is turned on
M950 F1 C"e1heat" Q500                         ; create fan 1 on pin e1heat and set its frequency
M106 P1 H1 T45 S255                               ; set fan 1 value. Speed is set to 255. Thermostatic control is off



; Tools
M563 P0 D0 H1 F0                               ; define tool 0
G10 P0 X0 Y0 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
T0                                             ; select first tool

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Hi!

I own ender3 pro with default extruder and almost direct extruder (6cm Bowden).

When I print 20mm cube it comes out 3x taller (z axis). With no underextrusion present

I'm using default ender3 config from configurator

; Drives
M569 P0 S0 T0.1:0.1:0.02:0.02                  ; physical drive 0 goes backwards using TMC220x driver timings
M569 P1 S0 T0.1:0.1:0.02:0.02                  ; physical drive 1 goes backwards using TMC220x driver timings
M569 P2 S1 T0.1:0.1:0.02:0.02                  ; physical drive 2 goes forwards using TMC220x driver timings
M569 P3 S0 T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
M584 X0 Y1 Z2 E3                               ; set drive mapping
M92 X80.00 Y80.00 Z400.00 E96.50                ; set steps per mm
M566 X1200.00 Y1200.00 Z24.00 E300.00          ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00          ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30                   ; set motor currents (mA)
M84 S30                                        ; Disable motor idle current reduction

Do you have any tips?