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Issue with Z axis height

Posted by peterdawson 
Issue with Z axis height
February 19, 2018 11:28AM
Hey eveyone.

I'm hoping domeone can help me.

I have a Teebot that calibrates fine.

When I go to print it seems to be 1.4mm too high when it goes to print.

I'm sure it's something in the firmware side. I'm using Slicer to do stuff with.

I'm a noob and really need some guideance. I'm sure it's something I've done as it work first time and since then, nothing.

Thanks in advance.

Re: Issue with Z axis height
February 19, 2018 11:29AM
Sorry just needed to make sure I follow in case someone helps out.
Re: Issue with Z axis height
February 19, 2018 04:44PM
If you send a G1 Z0 command, does the nozzle go to Z0 or is it 1.4mm too high.
If it does go to Z0 then look for a Z offset in the slicer
Re: Issue with Z axis height
February 20, 2018 09:02AM
Hey odewan,

When I hit home it says X:020.0 Y:100.0 Z:003.5

G1 Z0 takes it down to 3.1

Now a business card is nice and tight under the nozzle

Obviously I have an offset somewhere

I've attached a file that shows the settings in Pronterface, the actual setting from the machine M115 and M501 and also Slic3r

>>> M115
FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:[www.mendel-parts.com] PROTOCOL_VERSION:1.0 MACHINE_TYPE:TeeBot EXTRUDER_COUNT:1 UUID:00000000-0000-0000-0000-000000000000

I look forward to your reply to see what you find wrong.

Thanks in advance,

open | download - Slic3r Settings.docx (386 KB)
Re: Issue with Z axis height
February 20, 2018 05:18PM
In the slicer printer settings you have a Z offset=1.4 mm, this will add 1.4 mm to the nozzle height when you print, however if your nozzle is 3 mm above the bed after homing and sending a G1 Z0 then either
your Z endstop needs adjusting or you have a Z offset in the firmware somwhere

Edited 1 time(s). Last edit at 02/20/2018 05:21PM by obewan.
Re: Issue with Z axis height
February 20, 2018 10:43PM
I have an optical sensor on the machine so it seems to sit at Z3.5 on the screen

Doing the G1 Z0 brings it down.

When I go to start a print it goes into the middle of the tray and sits at that Z0 position. As soon as it starts it then goes up too high.

I guess I'll have to look in the firmware for an offset, where should I look?
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