CompoundCarl wrote:There's a lot of different ways to do this. If you're using a printer that speaks normal gcode, you can just use the real-time extrusion override knobs in the Machine Control Panel to adjust the extrusion rate as it's printing. I like doing that since I can actually adjust it in real-time (for example, extrude a bit more if it's having trouble sticking).
You can also use the global z-axis offset to move the nozzle higher above the bed for the first layer. That will have the same affect as lowering the extrusion amount for this layer.
Typically, people want MORE plastic extruded on the first layer, but there's a few ways you could do it if you really want less plastic for some reason
Hi CompoundCarl, thanks for the reply, yes I can stand by my printer and make adjustments manually on the GLCD (Marlin Firmware on Rambo Board) as layer changes but that is for me a waste of my time if it can be done automatically in the G-code (without having to manually edit the G-code). I have tried using scripts in "commands for post processing" under the scripts tab but have not been very successful as I am not a coder, this simple instruction should not be so hard to incorporate.
Yes I could raise Z but I want to use my existing calibrated first layer Z height.
Could you please explain “there’s a few ways you could do it" much appreciated.
Thanks again and regards - bruce