Hello everyone, I am having a little trouble after installing a new E3D hot

3D Printing
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1

Hello everyone,
I am having a little trouble after installing a new E3D hot end. Getting the hot end installed, wired, and operational went without issue. But when it came to setting the new z-offset in firmware is where I am having trouble.
No matter what value I enter in for ‘Z_PROBE_OFFSET_FROM_EXTRUDER’
the Z height after probing does not change and runs down about 1mm or so into the print surface.

My setup: i3 RAMPS running Marlin with auto bed leveling probe via RC servo.
The value I am getting after setting all axes to 0 with the hot end placed just above the print surface is 11.80 (was 12.30 with the old J-head) with z-probe extended and 0.1mm raised after triggering the z-probe (11.80).

I have been able to adjust the probing travel speed successfully as well as z height after probing and the uploads to the board are going just fine.
It’s very weird, no matter what value I enter and upload for the offset the head goes to the same position, even if I set the offset to 15.00 or 8.00, I always get the same result.

Any thoughts?

2

You probably still have the old values stored in EEPROM. Use the following commands (particularly M502 and M503) to figure out what settings Marlin is currently using:

// M500 - stores parameters in EEPROM
// M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
// M502 - reverts to the default “factory settings”. You still need to store them in EEPROM afterwards if you want to.
// M503 - print the current settings (from memory not from EEPROM)

from https://github.com/ErikZalm/Marlin/blob/Development/Marlin/Marlin_main.cpp

3

Thank you @Thomas_Sanladerer , I will try setting to the eprom.