Generating gcode

While you can act ruthless during the modeling phase, caution is never enough when finalizing the g-code for your machine. Following are a few info you may find useful when generating g-code using Slice-Up.

WARNING: Slice-Up g-code only includes the necessary information to build your geometry. In order to make it work you must include head and tail instruction for your machine. If you don’t know how to do it yet, please read about here, then ask for help.

Gcode commands
Slice-Up g-code is universal. In fact it only uses G1 command for movements, and eventually M106 and M107 to control the fan.

Importing Head and Tail
You can import head and tail g-code from a .txt file.
This way they will be automatically before and after the gcode block generated from Slice-Up.

You can set either Absolute M82 or Relative M83 extrusion.
Whatever you choose, make sure it is consistent with your g-code head.


  • Filament Standard will make calculations using filament diameter, nozzle size and extrusion multiplier. It calculates the extrusion cross-section and compare it to the filament cross section.

  • LDM will make calculations using extruder width and multiplier only. It times the extrusion cross-section to the multiplier.

Toolpath in Slice-Up is strictly continuous. You can choose in between two different logics: spiral or multi.

It only works with single-wall objects and offer little control over the toolpath computation. Some important options include:

  • Align Sections → it align the seam prior to toolpath computation (Default = False)
  • Spiral Height → Height of the spiral above the start layer (Default = 0.25)
  • Seam Opening → Let you adjust the seam space on base layers (Default = 1.5)

Multi stands for multiple walls, but it also work on single walls. You have a few choices on how to generate the toolpath which includes:

  • Continuous Direction
  • Alternate Direction
  • Outer Loop First, Inner Loop First or Alternate

Seams Control

  • Seam Width Multiplier → Useful to adjust the width size of seams.
  • Seam Flow Multiplier → Useful to adjust the flow rate at seams location.