Autocalibration and bed mesh compensation issues

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buggy
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Posts: 63
Joined: Sun Jan 17, 2016 8:05 pm
Location: everett, washington

Autocalibration and bed mesh compensation issues

Post by buggy »

Hey guys I feel really bad for flooding the forums with posts but i just can not seem to get a successful print after my upgrade. Im trying to solve the issue of getting a good first layer using auto calibration and bed mesh compensation but it doesnt seem to be working for me. Ive changed the radius as well as probe spacing but still when i go to print it seems too close to the bed in spots (see photo).

Ive been trying for days trying to figure it out and its extremely frustrating because i know how amazing this setup (duet wifi and fsr with trick laser plate) should be but i feel like im missing something. I will attach the bed height map and a photo of my first layer to see if someone can help me out. my auto calibration returns a consistent deviation of .02 and i have checked the trigger height of my fsr across all the probing spots for the auto calibration. This ranged from -.180 near fsr to -.265 max. the center of z had a trigger height of -.242 which im using as a z offset. Should i instead use a average of all the trigger heights ive calculated and use that as my z offset?

Code: Select all

; Configuration file for SeeMeCNC Rostock MAX V2

; Communication and general
M111 S0                             	; Debug off
M550 PSeeMeCNCRostockMAXV2		; Machine name and Netbios name (can be anything you like)
;*** Wifi Networking
M552 S1					; Enable WiFi

M555 P2                           	; Set output to look like Marlin
M575 P1 B57600 S1			; Comms parameters for PanelDue

G21                                 	; Work in millimeters
G90                                	; Send absolute coordinates...
M83                                 	; ...but relative extruder moves

; Axis and motor configuration
M569 P0 S1				; Drive 0 goes forwards
M569 P1 S0				; Drive 1 goes forwards
M569 P2 S1				; Drive 2 goes forwards
M569 P3 S1				; Drive 3 goes forwards
M569 P4 S1				; Drive 4 goes forwards
M574 X2 Y2 Z2 S1			; set endstop configuration (all endstops at high end, active high)

;*** The homed height is deliberately set too high in the following - you will adjust it during calibration

M665 R143.685 L290.8 B120 H380.91 X-0.168 Y-0.300 Z0		; set delta radius, diagonal rod length, printable radius and homed height
M666 X-0.38 Y-0.38 Z0				; put your endstop adjustments here, or let auto calibration find them
M350 X16 Y16 E16 I1    			; Set 16x microstepping with interpolation
M92 X80 Y80 Z80				; Set axis steps/mm
M906 X1000 Y1000 Z1000 E1000 I60		; Set motor currents (mA) and increase idle current to 60%
M201 X1000 Y1000 Z1000 E1000		; Accelerations (mm/s^2)
M203 X20000 Y20000 Z20000 E3600		; Maximum speeds (mm/min)
M566 X1200 Y1200 Z1200 E1200		; Maximum instant speed changes mm/minute

; Thermistors
M305 P0 T100000 B3950 R4700 H30 L0	; Put your own H and/or L values here to set the bed thermistor ADC correction
M305 P1 T100000 B4725 R4700 H30 L0 C7.06e-8	; Put your own H and/or L values here to set the first nozzle thermistor ADC correction
;M305 P2 T100000 B3974 R4700 H30 L0	; Put your own H and/or L values here to set the second nozzle thermistor ADC correction
M570 S180				; Hot end may be a little slow to heat up so allow it 180 seconds

; Fans
M106 P1 H-1 				; disable thermostatic mode for fan 1

; Tool definitions
M563 P0 D0 H1                       	; Define tool 0
G10 P0 S0 R0                        	; Set tool 0 operating and standby temperatures
;*** If you have a single-nozzle build, comment the next 2 lines
;M563 P1 D1 H2                      	; Define tool 1
;G10 P1 S0 R0                       	; Set tool 1 operating and standby temperatures
M92 E91.4	                        ; Set extruder steps per mm

; Z probe and compensation definition
M558 P4 X0 Y0 Z0 ;H5 F1200 T2400	

; grid compensation
M557 R80 S6

G31 X0 Y0 Z-0.238		; Set the zprobe offset and threshold (determine your printer's Z offset value). For a delta, use zero X and Y offset.

;*** If you are using axis compensation, put the figures in the following command
M556 S78 X0 Y0 Z0                   	; Axis compensation here

T0						; select first hot end
M501 ;uses override calibration settings
heightmap.jpg
20180205_075451.jpg
buggy
Printmaster!
Posts: 63
Joined: Sun Jan 17, 2016 8:05 pm
Location: everett, washington

Re: Autocalibration and bed mesh compensation issues

Post by buggy »

Here is also my bed.g in case that sheds light on it

Code: Select all

; About the G30 S parameter
; Used to specify what calibration computation to perform.
;
; S=-1 Don't adjust anything, just print the height error at each probe point
; S=0 Equivalent to S=<number_of_points_probed>
; S=3 Adjust homing switch corrections only
; S=4 Adjust homing switch corrections and delta radius
; S=6 Adjust homing switch corrections, delta radius, and X and Y tower position offsets
; S=7 Adjust homing switch corrections, delta radius, X and Y tower position offsets, and diagonal rod length 

M561					; clear any bed transform, otherwise homing may be at the wrong height
G28					; home the printer

;G1 X0.00 Y135.00 Z10 F15000			; move to just above the first probe point (from the list below)


; bed.g file for RepRapFirmware, generated by Escher3D calculator
; 13 points, 6 factors, probing radius: 100, probe offset (0, 0)
G30 P0 X0.00 Y100.00 Z-99999 H0.046 
G30 P1 X64.28 Y76.60 Z-99999 H-0.002
G30 P2 X98.48 Y17.36 Z-99999 H-0.023
G30 P3 X86.60 Y-50.00 Z-99999 H0.062
G30 P4 X34.20 Y-93.97 Z-99999 H-0.005
G30 P5 X-34.20 Y-93.97 Z-99999 H-0.008
G30 P6 X-86.60 Y-50.00 Z-99999 H0.059
G30 P7 X-98.48 Y17.36 Z-99999 H0.029
G30 P8 X-64.28 Y76.60 Z-99999 H0.024
G30 P9 X0.00 Y50.00 Z-99999 H0.044
G30 P10 X43.30 Y-25.00 Z-99999 H-0.006
G30 P11 X-43.30 Y-25.00 Z-99999 H0.031
G30 P12 X0 Y0 Z-99999 S6

G29 S1 ;Load bed compensation map

G1 X0 Y0 Z150 F15000			; get the head out of the way of the bed
geneb
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Re: Autocalibration and bed mesh compensation issues

Post by geneb »

Why is your probe radius only 100? If you've got a v2 or v3 that you're working with, that should be 135. Also, try doing a 16 point calibration - 10 on the outer, 6 on the inner.

g.
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buggy
Printmaster!
Posts: 63
Joined: Sun Jan 17, 2016 8:05 pm
Location: everett, washington

Re: Autocalibration and bed mesh compensation issues

Post by buggy »

With all the headaches ive been having with my first layer i shrank the bed mesh radius and added more probe points to see if that would improve the accuracy, i will add more probe points for the auto calibration.
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