Issue with Z axis height

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.

Peter

Sorry just needed to make sure I follow in case someone helps out.

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

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
SENDING: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,

Peter

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.

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?