3D Touch start hight

[Suggy]

Hi all
Fitted a 3D Touch auto leveling sensor, followed the instructions to the T, in the firmware settings it says to set the #define Z_PROBE_OFFSET_FROM_EXTRUDER -1.4 to -1.4 which I did but when it starts printing the nozzle is 1.4mm from the bed and yes I did manualy level the bed. Using Simplify3D, do I need to change any setting in S3D (cannot find any) or do I need to change the FW to say -0.04?

[Uslingen]

I also had a lot of initial problems with the starting height. In my case the problem was the old Z offset stored in EEPROM. So no matter what value I put in the firmware, the old Z offset was always used.

You can verify it by first issuing a G28 to home the nozzle and afterwards issue an M114. This will tell you what the offsets are and the Z offset displayed should be the same as you put in the firmware. If they are not the same, you can load the offsets from firmware by issuing a M502, followed by a M500. This will revert to "factory settings" and store the new values. If this doesn't help or change anything, have a look at M851 for setting the Z-probe offset.

Hope this helps...

/Uslingen

[Suggy]

Ok thanks for the reply, will try this, this weekend

[Uslingen]

Actually I found a much simpler way - on the LCD screen you can check/set the same values by navigating to: Control -> Motion -> Z Offset
Remember to save values in EEPROM if you change anything or they will be lost after a reset: Control -> Store memory

[Suggy]

Ok
Did that and changed to 0.5 and its still 1.4mm from the bed.
I need to get it down to at least 0.4 as I don't want to print using a raft.
Any more suggestions ?

[William]

Hi,
You can refer to point 3 in this post:
http://www.geeetech.com/forum/viewtopic ... 27&t=18371