Homing advice

agent0810

so when i "home all" it sends it to the back right corner. when i got to 0,0 it goes to the front left corner. when i try to start a print, it starts in the back right corner, bangs against the stops then the bed starts to lower all the way.

Phaedrux

What do you have in your start gcode?

agent0810

Here is the start:

;FLAVOR:Marlin
;TIME:336
;Filament used: 0.10025m
;Layer height: 0.2
;MINX:89
;MINY:95
;MINZ:0.2
;MAXX:131
;MAXY:125
;MAXZ:14.8
;Generated with Cura_SteamEngine 4.6.1
M140 S60
M105
M190 S60
M104 S230
M105
M109 S230
M82 ;absolute extrusion mode
M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate
M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration
M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk
M220 S100 ;Reset Feedrate
M221 S100 ;Reset Flowrate

G28 ;Home

G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up
G1 X10.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X10.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line
G1 X10.4 Y200.0 Z0.28 F5000.0 ;Move to side a little
G1 X10.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line
G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up

G92 E0
G92 E0
G1 F5100 E-7
;LAYER_COUNT:86
;LAYER:0
M107

Phaedrux

@agent0810 said in Homing advice:

M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate
M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration
M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk

Unrelated, but delete those lines from your slicer start gcode section in Cura.

I don't see a G90 in there to make sure you're in absolute positioning mode.

Does it do the prime line correctly or does it just start crashing?

agent0810

just starts crashing.

agent0810

Here are my machine settings in cura......do the print head settings look okay?

Phaedrux

Change the Gcode flavor to RepRap.

Can you share an actual sliced gcode file?

agent0810

yea let me see what i can get. should i just place G90 in before the G92? googled it and didnt see an actual setting for it in cura but someone said they just put it in the start code.

Phaedrux

Well I'd like to see the full sliced gcode first to see what it's actually got inserted where.

agent0810

I think this is what you are looking for.

base_x.gcode

Phaedrux

Ok, try changing your start gcode to be

M220 S100 ;Reset Feedrate
M221 S100 ;Reset Flowrate

G28 ;Home
G90 ; absolute positioning.

G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up
G1 X10.1 Y20 Z0.28 F5000.0 ;Move to start position
G1 X10.1 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line
G1 X10.4 Y200.0 Z0.28 F5000.0 ;Move to side a little
G1 X10.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line
G92 E0 ;Reset Extruder
G1 Z2.0 F3000 ;Move Z Axis up

G92 E0
G92 E0
G1 F5100 E-7

The other question I have is about your Z probe. Currently you are homing to the Z max position with an endstop. Do you also have a probe installed? Is your Z axis moving correctly?

agent0810

alright ill drop that in there, thank you.

i have this probe that came yesterday i need to install, but i need to print a bracket to put it on before i can lol.

https://www.filastruder.com/products/mini-differential-ir-height-sensor

agent0810

So i think we have progress, no crashing before hand, but the bed goes half way down and then it starts to print but doesnt extrude any fillament.

Phaedrux

That sounds like the Z steps per mm is incorrect.

Try to measure how much it actually moves when you command it to move 10mm.

I'm not sure off hand what the Ender 5 pro Z steps should be, but if you have lead screw and motor details it can be worked out.

Z_steps_per_mm = (motor_steps_per_rev * driver_microstep) / screw_lead

agent0810

i raised it all the way, marked the back, lowered it 10mm then marked the back, lowered the bed out of the way and measured, looks like it only went about 4.5mm.

Will the motor steps and driver info be online or on the device?

thanks again for all your help on this.

Phaedrux

Doing a Google it looks like it might be 800. Which kinda matches with what you've measured.

agent0810

so update that in the config.g?

current:
M92 X80.00 Y80.00 Z400.00 E93.00 ; set steps per mm

change to:
M92 X80.00 Y80.00 Z800.00 E93.00 ; set steps per mm

agent0810

tried that and took a step back.

it crashed a bit when the job started, then the bed lowered probably 3/4 of the way down and its printing now while the bed is still almost all the way down and no fillament coming out of the extruder.

Phaedrux

Does the Z axis move the right amount with 800 steps per mm?

Can you post a video of it running?

Is the extruder motor trying to move at all? Is the hotend at temp?

And just to confirm, after homing you're able to jog the head around the bed fine?

agent0810

This post is deleted!