My first layer with carbon petg is too squished to bed. But there isn’t a Z offset adjustment available. How do I fix this
Using flow calibration and bed calibration
And default profile
Try a smaller first layer at a slower speed
For instance first layer .16mm at 130mms then every other layer .2mm at normal print speeds
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@Mr.Exocomp Have a look at the machine code (startcode) for the printer and copy the machine start code into an editor. You will find somewhere this entry
;===== for Textured PEI Plate , lower the nozzle as the nozzle was touching topmost of the texture when homing ==
;curr_bed_type={curr_bed_type}
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z-0.04 ; for Textured PEI Plate
{endif}
This is where the Z Offset is set to be lowered by 0.04 mm
You can amend this to
;===== for Textured PEI Plate, High Temp Plate and Wham Bam Plate ===============
;curr_bed_type={curr_bed_type}
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z-0.04 ;squish of -0.02mm for Textured PEI Plate
{elsif curr_bed_type==“High Temp Plate”}
G29.1 Z0.03 ;raise of 0.03mm for High Temp or Wham Bam Plate
{endif}
i e depending on which plate you chose, the offset will go up or down.
You can amend Z0.03 to more or less
positive number = offset up
negative = offset down (more squish)
I use this for my X1C)
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Thank you for sharing
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@mr1952 , wouldn’t this change the squish for all filaments and not just PETG? I can print PLA just fine with the Wham Bam. Ideally, I would only change the z offset for PETG filaments
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@mr1952 , also, I tried your Gcode, but it did not work for me. I get the following error.
Failed to generate G-code for invalid custom G-code.
machine_start_gcode Parsing error at line 277: Not a variable name
{elsif curr_bed_type==“High Temp Plate”}
^
Please check the custom G-code or use the default custom G-code.
Here is the Gcode I used:
;===== for Textured PEI Plate, High Temp Plate and Wham Bam Plate ==
;curr_bed_type={curr_bed_type}
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z-0.04 ;squish of -0.02mm for Textured PEI Plate
{elsif curr_bed_type==“High Temp Plate”}
G29.1 Z0.03 ;raise of 0.03mm for High Temp or Wham Bam Plate
{endif}
I can’t see anything wrong. You could try ensuring that the space right after elsif isn’t accidentally a shift-space. I’ve been bitten by that bug a couple of times - impossible to spot. Might be platform dependant though. I think I’ve only seen it under Linux (I just tried producing a shift-space on macOS in a few editors but they come out as perfectly normal spaces).
It’s not in the filament profile, but the latest beta of Orca Slicer does expose a z-offset in the machine configuration.
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It looks like the quotes may have been turned into “smart quotes”. Try copying it from a code block instead. I’ve also include a TOTALLY UNTESTED if/else/endif block for adjusting the squish based on the material type – only use it if you understand and are willing to test it out. Any time I change the machine gcode, I watch the print head very closely, with my hand on the power switch. (not the e-stop, because it’s not a real e-stop… 
)
;===== for Textured PEI Plate, High Temp Plate and Wham Bam Plate ===============
;curr_bed_type={curr_bed_type}
{if curr_bed_type=="Textured PEI Plate"}
{if filament_type[initial_no_support_extruder]=="PETG"}
G29.1 Z-0.02 ; squish of -0.02mm for PETG on Textured PEI Plate
{else}
G29.1 Z-0.04 ; squish of -0.04mm for everything else on Textured PEI Plate
{endif}
{elsif curr_bed_type=="High Temp Plate"}
G29.1 Z0.03 ; raise of 0.03mm for High Temp or Wham Bam Plate
{endif}
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First, thanks for the quick and detailed reply.
This Gcode did not throw an error, but it did not seem to work. I tested it a few times, and one of those times, I set the Z offset for the High temp plate to 2 mm just to check if it was doing anything. After a very normal first layer, this proved to me that the Gcode was not working as intended. 
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For anyone who is still having the same problem. I just got my new printer and have been tinkering with it for a while. It became clearly visible that the Z position was not the problem as it worked fine every time I switched back to PLA.
It’s the consistency of PETG. You need to increase the flow ratio in the filament settings. In my case, I increased it to 1.4, but I still need to find the golden ratio.
Good luck!
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Update: So i was not quiete happy with the results of a higher flow ratio.
The surfaces always turned out to be a little rought.
Youtube: /watch?v=_EJwJ7QPCYY
surprisingly his settings from this video fixed my issue first try. Try those out!
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This was it for me as well. Just got my A1 a few days ago & printing some smaller parts that were struggling, i have my flow rate at 1.35 now, & works perfect
If you want to try a different setting in the future because you are not satisfied with the result, add this line to the printer settings-> Machines g-code-> Start g-code last 7 lines
"
{endif}
G29.1 Z{-0.16} ; <==========ADD THIS
;========turn off light and wait extrude temperature =============
"
This moves the plate upwards. Play around with this value.
I set it to -0.16 for PETG and my flow ratio is now normal again.
I wasn’t entirely happy with the higher flow ratio.
Thanks for this! I have encountered the “smart quotes” problem and now I have this solved and working.
My start gcode now it is as follow:
;===== for Textured PEI Plate , lower the nozzle as the nozzle was touching topmost of the texture when homing/for Smooth PEI Plate / High Temp Plate raise the nozzle a bit ==
;curr_bed_type={curr_bed_type}
{if curr_bed_type==“Textured PEI Plate”}
G29.1 Z{-0.02} ; for Textured PEI Plate
{elsif curr_bed_type==“High Temp Plate”}
G29.1 Z{0.04} ; raise of 0.04 mm for Smooth PEI Plate / High Temp Plate
{endif}
I have also tested a value of 0.05 and proved it effective.
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This is another option if you want custom offset settings for filament types or bed plates.
Hello. What is the cool plate called in the gcode?? “enginering plate” “texture pei plate” …???
Try curr_bed_type=Cool Plate
Hello,
For my part, with the help of ChatGPT, I added the following line in the filament settings (Filament settings > Advanced > Filament start G-code):
G92 Z-0.01 ; Adjust/increase height Z offset by 0.01mm
A negative value adds space, while a positive value lowers the nozzle and squishes the material.
I don’t know how good this is, but it works pretty well if you want to assign this parameter to a single filament.
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Yes unfortunately it does so one has to put in a few more if statements there to make sure it only happens when PETG is selected as filament.