Jump to content
Ultimaker Community of 3D Printing Experts

Recommended Posts

I'm looking for a team that is interested in dual extrusion on UM2.

To realize dual extrusion on this machine the team should have skills like:

-programing firmware (using actually tinkergnome firmware)

-Plugin for Cura

-people testing the equipment.

-CNC programing/milling ->that's me.

Main issue in dual extrusion is oozing.

To fight that problem I have created a tiny aluminium chiller and a new design for a really fast heater block.

To prevent oozing it is necessary to decrease the temperature of the inactive tool by ~40°, depending on the filament you are using.

In my design the aluminium chiller replaces the small fan , the cooling rib and the bottom hot end holder in the tool head (it makes no noise when idle:))

At the beginning I made test with Olsson block and was disappointed because of long cool down and heat up times.

In the next step I did a redesign of the Olsson block.

1st: Having the extruded material exactly between heater cartridge an PT100 sensor.

2nd: Reduce thermal mass.

3rd: Reduce weight.

Now I'm at a point where I need your help.

The firmware of the printer needs to be improved.

The way I would prefer is:

add a new variable to the file "Material.txt" called "idle_temperature" this variable is stored with each material in the printers software. It should be possible to edit the value online.

When printing a part and there is a tool change ahead, the printer should move to tool change position and heat up the new tool, cool down the inactive tool.

Example:

G1 F900 X103.178 Y39.538 E193.22154

G92 E0

G10 S1 ;retract before tool change is already implemented

G1 Z0.275

T1 M6 ; M6 = move to tool change position -> heat up / cool down extruders

G0 F9000 X75.509 Y72.471

;TYPE:SUPPORT

G1 Z0.200

G11

G1 F1200 X75.509 Y81.131 E0.69280

G1 X66.849 Y81.131 E1.38560

G1 X66.849 Y72.471 E2.07840

If you are interested, I can provide you:

-A set of heater blocks, replacing Olsson or standard heater block (without nozzles).

-CNC milled dual head chiller. with 2 tube connectors 4mm

-A light weight fan holder as stl file or printed in Polymaker PC-Plus /black .

The cost for a set of heater blocks + water cooled chiller will be 120€.

You need of course a second extruder with all parts leading to the tool head.

A external 80mm aluminium chiller 12€

A brushless water pump. 4€. IMG_8388.thumb.JPG.71ce82c6e37df5ef52c6aa22a486ae70.JPG

Greetings Roland

IMG_8388.thumb.JPG.71ce82c6e37df5ef52c6aa22a486ae70.JPG

  • Like 3

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

    • How to 3D print with reinforced engineering materials
      Ultimaker is hosting a webinar where we explain how you can achieve and maintain a high print success rate using these new reinforced engineering materials. Learn from Ultimaker's Product Manager of Materials and top chemical engineer Bart van As how you can take your 3D printing to that next level.
      • 2 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!