Having problems with Anycubic Kossel Linear Plus calibration

SnakeSP · 9 Jan 2019, 00:08

I'm new to the Duet, love this board already - fast and it is possible to make configurations on the fly.
Yet i have problems with calibrating my delta printer. It was initially on Marlin 1.1.9 and i even managed to get acceptable prints on it before.
Now i have installed Duet board and moved to 24 V power supply. No changes to heat bed (except for wiring of course), MK3+Ultrabase. No changes to rods and carriages. Changed the heating cube and nozzle.
Now i'm trying to calibrate using the original Anycubic Z probe (switch). Mesured it's trigger height: G31 P500 X0 Y0 Z15.893
Trying to calibrate using 6-factor calibration. The results are not good: when i try to print, the printing goes too high from bed and plastic (PETG, 230 on hotend, 70 on bed) does not stick to bed at all. I try baby stepping going down to -0,13 - still not sticking. With babystepping -0.14 the plastick is smiply smashed into bed, it sticks, but won't go from bed after cooling and removing the print.
Can you, please, help me out and point what i'm missing?

Veti · 1 Sept 2019, 04:18

post your config. you might have not configured the thermistor correctly and therefore printing at the wrong temperature.

SnakeSP · 9 Jan 2019, 11:10

Here are config.g, config-override.g and bed.g.
I tried to change bed temperature to 80 С with no success.
Thermistor used on hotend is this one: HT-NTC100K
2_1567334916468_config-override.g 1_1567334916468_config.g 0_1567334916467_bed.g

BTW i'm on Firmware Version: 2.0(RTOS) (2018-06-05b3)
WiFi Server Version: 1.21
Web Interface Version: 1.22.6
Do you think updating to 2.04 RC1 will do anything better?

Veti · 1 Sept 2019, 11:47

does this happen for pla as well?

SnakeSP · 1 Sept 2019, 13:03

@veti yes, just the same with PLA

Veti · 1 Sept 2019, 13:40

; Axis Limits
M208 Z0 S1 ; Set minimum Z

this will disallow babystepping below 0 i believe

Veti · 1 Sept 2019, 13:46

also you have 271.5 as the rod length. marlin has 267 for it.

jay_s_uk · 1 Sept 2019, 14:06

Your steps per mm are wrong. These should be 80 and not 100.
Are you using mesh compensation as well in case your bed is slightly tilted?

SnakeSP · 1 Sept 2019, 15:07

@veti Good point, will double check.

SnakeSP · 9 Jan 2019, 15:14

@veti Yes, Marlin has 267, i took 271.5 after one of the calibration attempts. Will change to 267 and try again (actial measurements show 266.5, but not sure that those are really accurate as i was using just a metal ruler).

SnakeSP · 1 Sept 2019, 15:10

@jay_s_uk No, steps are correct, i'm using 16 teeth pulleys now, not 20 teeth as in the original build.
Tried bed compensation - did not help.

SnakeSP · 9 Jan 2019, 15:51

Set L=267, recalibrated with S6:

6:22:32 PMM666
Endstop adjustments X-0.86 Y0.95 Z-0.09, tilt X0.00% Y0.00%
6:22:27 PMM665
Diagonal 267.000, delta radius 133.934, homed height 287.589, bed radius 115.0, X 0.517°, Y -0.986°, Z 0.000°
6:22:11 PMG32
Calibrated 6 factors using 16 points, deviation before 0.041 after 0.041

Checked with S-1:
6:28:52 PMG32
G32 bed probe heights: 0.061 0.048 -0.070 -0.012 0.047 0.035 -0.052 -0.038 0.061 0.031 -0.060 -0.030 0.000 0.011 0.019 -0.029, mean 0.001, deviation from mean 0.043

Checked that the nozzle goes to correct position: lowered nozzele to Z=0 and was hardly able to put paper between nozzle and bed (just as back then when i was on Marlin), so Z=0 is about 0.08 mm above the bed at center. Tried moving nozzle at Z=0 - height is about the same.

Commented M208 Z0 S1 in the config.goes

Tried printing PLA at bed 50C and hotend at 190C. Layer = 0.2, no offsets applied. Printing goes mid air.
Tried using baby stepping. No changes till -0.2. With baby stepping = -0.2 plastic hardly sticks to bed but is moved away by the nozzle when it goes to the next line.
Baby stepping = -0.22 made plastc smash into the bed.

I really do not understand what's wrong...

Veti · 1 Sept 2019, 15:53

@snakesp said in Having problems with Anycubic Kossel Linear Plus calibration:

really do not understand what's wrong...

while printing do a M122 and show us the output. just to make sure that no mesh bed leveling is active.

SnakeSP · 1 Sept 2019, 16:05

@veti said in Having problems with Anycubic Kossel Linear Plus calibration:
7:03:57 PMM122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 2.0(RTOS) running on Duet WiFi 1.02 or later
Board ID: 08DGM-9T6BU-FG3SW-6J1FG-3SS6L-KBTHH
Used output buffers: 3 of 20 (15 max)
=== RTOS ===
Static ram: 28380
Dynamic ram: 95920 of which 16 recycled
Exception stack ram used: 372
Never used ram: 6384
Task NETWORK ready, free stack 396
Task HEAT blocked, free stack 1256
Task MAIN running, free stack 3624
=== Platform ===
Last reset 00:18:40 ago, cause: software
Last software reset at 2019-09-01 18:45, reason: User, spinning module GCodes, available RAM 6384 bytes (slot 1)
Software reset code 0x0003 HFSR 0x00000000, CFSR 0x00000000, ICSR 0x0041f000, BFAR 0xe000ed38, SP 0xffffffff
Error status: 0
Free file entries: 9
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms
MCU temperature: min 56.2, current 56.4, max 56.6
Supply voltage: min 23.2, current 23.9, max 24.3, under voltage events: 0, over voltage events: 0
Driver 0: ok, SG min/max not available
Driver 1: ok, SG min/max not available
Driver 2: ok, SG min/max 75/194
Driver 3: ok, SG min/max not available
Driver 4: standstill, SG min/max not available
Date/time: 2019-09-01 19:03:55
Slowest loop: 174.92ms; fastest: 0.08ms
=== Move ===
Hiccups: 0, StepErrors: 0, LaErrors: 0, FreeDm: 228, MinFreeDm 213, MaxWait: 0ms, Underruns: 0, 0
Scheduled moves: 56, completed moves: 53
Bed compensation in use: none
Bed probe heights: 0.000 0.000 0.000 0.000 0.000
=== Heat ===
Bed heaters = 0 -1 -1 -1, chamberHeaters = -1 -1
Heater 0 is on, I-accum = 0.1
Heater 1 is on, I-accum = 0.2
=== GCodes ===
Segments left: 1
Stack records: 2 allocated, 0 in use
Movement lock held by null
http is idle in state(s) 0
telnet is idle in state(s) 0
file is doing "G1 X9.475 Y-40.525 F900" in state(s) 0
serial is idle in state(s) 0
aux is idle in state(s) 0
daemon is idle in state(s) 0
queue is idle in state(s) 0
autopause is idle in state(s) 0
Code queue is empty.
=== Network ===
Slowest loop: 3.74ms; fastest: 0.01ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8

WiFi -
Network state is running
WiFi module is connected to access point
Failed messages: pending 338, notready 0, noresp 0
WiFi firmware version 1.21
WiFi MAC address 4c:11:ae:02:e3:cf
WiFi Vcc 3.33, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 16200
WiFi IP address 192.168.1.37
WiFi signal strength -70dBm, reconnections 0, sleep mode modem
Socket states: 0 0 0 0 0 0 0 0
=== Expansion ===

M122

Veti · 1 Sept 2019, 16:11

@snakesp said in Having problems with Anycubic Kossel Linear Plus calibration:

RepRapFirmware for Duet 2 WiFi/Ethernet version 2.0(RTOS) running on Duet WiFi 1.02 or later

you are using a very old version of the firmware. just to rule out any problems there update to 2.04RC1

but the problems comes down to this? with marlin pla sticks on the ultrabase. with duet it does not?

SnakeSP · 9 Jan 2019, 16:21

@veti Simply put, yes, with Marlin prints were ok, with Duet plastic does not stick (not only PLA, PETG also).
But i'm almost sure this is due to i'm doing something wrong.
Will try updating to 2.04 RC1 today and recalibrate.
Also it may occur that thermistors are configured incorrectly (hotend thermistor is changed from original one, but the bed is the same except changing it to 24V).
Possibly bed or hotend or both produce lower temperature than expected, but not sure how test this. But on the other hand PLA should stick even to cold bed.

Veti · 1 Sept 2019, 16:22

@snakesp said in Having problems with Anycubic Kossel Linear Plus calibration:

lowered nozzele to Z=0 and was hardly able to put paper between nozzle and bed

this means that your offset is wrong btw. if there is space between the nozzle and bed for paper, then z=0 is not z=0 rather something like z=0.1+movement space.

Veti · 1 Sept 2019, 16:26

what thermistors have you configured in marlin?

SnakeSP · 9 Jan 2019, 16:30

@veti
Current Z probe offset is Z15.791, do you mean i should change it to 15.891 ?
It was
5 : 100K thermistor - ATC Semitec 104GT-2/104NT-4-R025H42G (Used in ParCan & J-Head) (4.7k pullup)
in Marlin, but that was original Anycubic thermistor. Same one for the bed.

Veti · 1 Sept 2019, 16:49

that is significantly different.

semitec is B4725 C7.060000e-8