My corexy hbot configurations and build pictures

[tracar]

i really did not know much about the sys folder and its contents , but a week later i got my printer working with a bit of help from a couple of smart moderators here : thanks

this is a work in progress, if you see any thing i need to pay attention to please let me know , i can test it out and see if it fits my build. and i will update as necessary .

Printer is a custom made Hbot. 500mm x 500mm x 950mm
dual independent Z axis steppers with each their own endstop

RepRapFirmware for Duet 2 WiFi/Ethernet version 2.05.1 running on Duet WiFi 1.02 or later

capable of homing the z axis (Z and U) separately and independently
to get the bed fairly level

it also can use G32 bed leveling to get it really level.

my X/Y endstops are in the rear left corner
my z endstops are on the left and the right sides of the x axis in the middle of the y axis.

X0 and Y0 are in the front left corner

im using external closed loop stepper drivers
x and y are (5) and (6), z and U are (7) and (8), in the config.g M584

my endstops are 24v proximity sensors, with schottky bat43 diodes

my config files are below and are the only files i changed, all else are original

; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
; General preferences

G31 X0 Y0 Z0 P25
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Duet2" ; set printer name
M669 K1 ; select CoreXY mode

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S0 ; disable FTP
M586 P2 S0 ; disable Telnet

; Drives
M569 P5 S0 T5 R1 ; physical drive x axis goes forwards
M569 P6 S1 T5 R1 ; physical drive y axis goes forwards
M569 P7 S1 T5 R1 ; physical drive z axis goes forwards
M569 P8 S1 T5 R1 ; physical drive U axis goes forwards
M569 P3 S1 ; physical drive Extruder goes forwards
M584 X6 Y5 Z7:8 U8 E3 P3 ; set drive mapping
M671 X-50:490 Y330:330 S5 ; x leadscrew position left to right from o,o on y axis , S5 means can adjust up to 5 mm
M350 X16 Y16 Z16 U16 E16 I1 ; configure micro stepping with interpolation
M92 X200.00 Y200.00 Z800.00 U800.00 E138.23 ; set steps per mm
M566 X200.00 Y200.00 Z12.00 U12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X25000.00 Y25000.00 Z1000.00 U1000.00 E2400.00 ; set maximum speeds (mm/min)
M201 X400.00 Y400.00 Z20.00 U20.00 E400.00 ; set accelerations (mm/s^2)
M906 X300 Y300 Z300 U300 E800 I30 ; set motor currents (mA)
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 U0 S1 ; set axis minima
M208 X440 Y535 Z900 U900 S0 ; set axis maxima

; Endstops
M574 X1 Y2 Z1 U1 S0 ; set active high endstops 1= minimum 2=maximum, S1 = normally closed and S2 = normally open

; Z-Probe

M307 H7 A-1 C-1 D-1 ; disable heater on PWM channel for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X0 Y0 Z4.247 ; set Z probe trigger value, offset and trigger height
M557 X70:400 Y180:500 S100 ; define mesh grid x70:400 starts at 50, ends at 400 SXX moves by what its set to between points

; Heaters
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M143 H0 S120 ; set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
M143 H1 S280 ; set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; 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
;M575 P1 S1 B57600 ; enable support for PanelDue

; deployprobe.g
;deployprobe.g
M280 P7 S10 ;deploy bltouch

;retractprobe.g
M280 P7 S90 I1 ; retract BLtouch pin

; homeall.g
; called to home all axes
;
M280 P7 S160
G91 ; relative positioning
G1 S2 H2 Z5 F800 ; lift Z relative to current position
G1 H1 X-445 Y540 F1800 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-445 ; home X axis
G1 H1 Y540 ; home Y axis
G1 X5 Y-5 F800 ; go back a few mm
G1 H1 X-445 F200 ; move slowly to X axis endstop (second pass)
G1 H1 Y540 F200 ; move slowly to Y axis endstop (second pass)
M584 Z7 U8 P4 ; split Z motor control to Z and U
G1 S1 H1 Z-900 U-900 F400 ; home Z and U axis
G1 Z5 U5 F200 ; go back a few mm
G1 H1 Z-900 U-900 F100 ; move slowly to Z and U axis endstop (second pass)
M584 Z7:8 P3 ; back to combined axes and hidden U
G90 ; absolute positioning
G92 Z0 ; set Z position to axis minimum (you may want to adjust this)
G91 ; relative positioning
G1 Z10 F800 ; lift Z relative to current position
G90 ; absolute positioning

; homex.g
; called to home the X axis
;
M280 P7 S160 ; Alarm Release and Push-Pin UP
G91 ; relative positioning
G1 H2 Z5 F800 ; lift Z relative to current position
G1 H1 X-445 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 X5 F800 ; go back a few mm
G1 H1 X-445 F360 ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F800 ; lower Z again
G90 ; absolute positioning

; homey.g
; called to home the Y axis
;
M280 P7 S160 ; Alarm Release and Push-Pin UP
G91 ; relative positioning
G1 H2 Z5 F800 ; lift Z relative to current position
G1 H1 Y540 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y-5 F800 ; go back a few mm
G1 H1 Y540 F360 ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F800 ; lower Z again
G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
M280 P7 S160 ; Alarm Release and Push-Pin UP
G91 ; relative positioning
G1 S2 H2 Z5 F800 ; lift Z relative to current position
M584 Z7 U8 P4 ; split Z motor control to Z and U
G1 S1 H1 Z-900 U-900 F400 ; home Z and U axis
G1 Z5 U5 F200 ; go back a few mm
G1 H1 Z-900 U-900 F100 ; move slowly to Z axis endstop (second pass)
M584 Z7:8 P3 ; back to combined axes and hidden U
G92 Z0 ; set Z position to axis minimum
G91 ; relative positioning
G1 Z5 F400 ; lift Z relative to current position
G90 ; absolute positioning

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Sun Aug 02 2020 19:54:07

M280 P7 S90
M561 ; clear all bed compensation
G28 ; home all axis
G90 ; absolute positioning
G1 X220 Y330 Z25 ; move probe to center of the bed
G30 ; set Z0 position with the probe
G1 Z25 ; return to 25mm height
G30 P0 X440 Y330 Z-99999 ; probe near a leadscrew, half way along Y axis
G30 P1 X0 Y330 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
G1 X220 Y330 Z25 ; move probe to center of the bed
G30 ; set Z0 position with the probe
M280 P7 S90

i hope by leaving this as an example for others it can be a good visual aide.

pictures of pin connections and printer layout to come.

[Veti]

@tracar said in My corexy hbot configurations and build pictures:

M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1

your thermistor settings are not configured properly. 4138 is the default and most likely wrong for your thermistors.

[tracar]

@Veti
this i had no clue i needed to fix. what do i need to do to fix this ?

[Veti]

@tracar

find out what thermistors you have and look in the spec sheet and find the beta value.

[tracar]

@Veti
ahhhh , i had to configer these in marlin as a 6 on the old prusa
i think that was a 100k

[Veti]

nearly all thermistors used today are 100k

marlin 6 is

• 6 : 100k EPCOS - Not as accurate as table 1 (created using a fluke thermocouple) (4.7k pullup)
  

not a good starting point.

where did you buy the thermistors?

[tracar]

@Veti
think it came with the prusa, i3 clone from folgertech a few tears ago!!

[Veti]

the prusa i3 clone comes with a mk8 hotend. are you still using that?

[tracar]

@Veti has been parted out long ago.
after reading up on this thermister stuff, i see what you are trying to get after.
i dont think i have the info, but can find out by using a temp probe . Or just ordering some from amazon that the values are known.

[Veti]

if you can establish the resistance at certain temperatures, then that would be perfect.

measure the resistance at something like 25, 120 and 240.

then use the https://configtool.reprapfirmware.org/Heaters click on the Beta value, select custom and enter those values.
It will calculate B and C for you. That would be more accurate as thermistors have variations that can lead to +/- 10 C.

Failing to do that you can buy a thermistor.
Preferable a Semitec 104-GT2.
I personally use a PT1000 (no daughter board necessary) for hotend and bed.

[tracar]

@Veti said in My corexy hbot configurations and build pictures:

f you can establish the resistance at certain temperatures, then that would be perfect.
measure the resistance at something like 25, 120 and 240.
then use the https://configtool.reprapfirmware.org/Heaters click on the Beta value, select custom and enter those values.
It will calculate B and C for you. That would be more accurate as thermistors have variations that can lead to +/- 10 C.
Failing to do that you can buy a thermistor.
Preferable a Semitec 104-GT2.
I personally use a PT1000 (no daughter board necessary) for hotend and bed

i understand, even with my current setup, i notice, its always overshooting the temp around 10 degrees, but then adjusts it to where it needs to be.

[Veti]

@tracar
that is an indication that you need to adjust the pid tuning.

see
https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

If during initial heating the temperature undershoots the target, reduce the A parameter. If it overshoots the target, increase the A parameter. Try increasing/decreasing it by 5% or 10%.

[tracar]

so 3724.2 would be a good starting point

[tracar]

@Veti said in My corexy hbot configurations and build pictures:

what about

M303 H1 S240 ; auto tune heater 1, default PWM, 240C target or maximum temperature

M303 ; report the auto-tune status or last result

[Veti]

yes and save those values in your config.g

[tracar]

the results of the M303 H1 S240

M307 H1 was used to get this info after the M303 H1 S240:

Heater 1 model: gain 869.9, time constant 308.4, dead time 3.1, max PWM 1.00, calibration voltage 24.2, mode PID, inverted no, frequency default
Computed PID parameters for setpoint change: P20.7, I0.672, D44.3
Computed PID parameters for load change: P20.

does it auto save this info? or how and where do i add this

[mrehorstdmd]

Is it H-bot or corexy? AFAIK, it can't be both...

[tracar]

@mrehorstdmd hbot

[tracar]

@mrehorstdmd

so after auto tuning and creating this :
M307 H1 A869.9 C308.4 D3.1 V24.2 B0
where in the config.g do i place it?
what is the B0? for

[Veti]

@tracar said in My corexy hbot configurations and build pictures:

where in the config.g do i place it?

after the
M950 H1
command

B0 Disables Bang Bang and enables PID mode.