Jump to content
Ultimaker Community of 3D Printing Experts

M302 not working. Any ideas? Printing with PCL at 130 °C and PVA as support

Recommended Posts

I am trying to print a model with PCL (Polycaprolactone) from extruder 1 (which has a very low melting temperature and needs the extruder to be 130 °C) and PVA as a support material from extruder 2 on the Ultimaker 3.

To enable cold extrusion I changed the Gcode and inserted the M302 command at the start of the Gcode and uploaded the file to a USB drive to print via USB.

The first layer is printed perfectly, but at the second layer no extrusion of PCL occurs. The PVA extrusion is working at every layer.

As a test i inserted the M302 command at every new layer in the Gcode (after each line ";LAYER: ...") But this did yielded the same result. Extruder 1 with PCL only extrudes ate the first layer.

Is there a way to lower the minimum extrusion temperature of extruder 1 so that extrusion at 130°C is  possible?

Edited by Guest

Share this post

Link to post
Share on other sites

Thank you Daid!

When printing a model with a single material yesterday one M302 command at the start of the Gcode did the job, so I got the feeling that it had something to do with the hotend change.

I started a small print of 15 layers in which i added M302 after each T0 and now I have extrusion on every layer with both extruders. So it works!

I just started a larger print of 378 layers, so we will see how it turns out.

Thanks again for the quick answer!

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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 126 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!