Jump to content
Ultimaker Community of 3D Printing Experts

Start gcode

Recommended Posts

I've been using simplify3d for printing some models on my UM2, mainly models requiring support. One thing I've noticed is in the start code, the command M907 E1400 exists to increase stepper motor current.

I'd much rather use the default current on the UM2.

By removing that line, am I right in saying that the current will be controlled by the firmware on the UM2 ?

Does the same go for things like acceleration etc.. where if they are not in the gcode, they default to the machines firmware settings ?


Share this post

Link to post
Share on other sites

I think it's real stupid that they mess with the current in there default UM2 profile....

Just for info here's what I use as start code, I start mid-front iso left front so normally your 2th line would be more like X10 Y10

G28 ; home all axes

G1 X110 Y45 F3000 ; bring extruder to the front

G92 E0 ; zero the extruded length

G1 Z30 ; lower

G1 E50 F225 ; purge nozzle with 50mm of filament

G1 X80 Y60 F3000 ; move little to the side

G92 E0 ; zero the extruded length again

  • Like 1

Share this post

Link to post
Share on other sites

I think it's real stupid that they mess with the current in there default UM2 profile


I agree, not sure what the reasoning is behind that.

Any particular reason you have it start in the middle ?

I'm still experimenting with simpify3d, getting decent prints but sometimes not as good as I want, especially in regards to blobs/stringing.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Our picks

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 95 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!