Ultimaker 3 Extended Guía
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How to perform a hot and cold pull
February 04, 2020 10:10
Cleaning filament can be used to clean the print core by applying hot and cold pulls. Hot
pulls are used to get the biggest parts of degraded material out of the print core and are
necessary when a print core is clogged. With a cold pull, the remaining small particles
will be pulled out, ensuring the print core is completely clean.
Preparation
1.
Navigate to the print core cleaning procedure on your printer:
a.
Go to
Preferences
→
Maintenance
→
Print head
→
Print core cleaning
on Ultimaker
S-line printers
b.
Go to
System
→
Maintenance
→
PrintCore
on the Ultimaker 3
2.
Select the print core you want to clean:
print core 1
or
print core 2
3.
Select the material you want to use for cleaning:
Cleaning �lament
or
PLA �lament
4.
Wait for the printer to heat up the print core and to retract the filament until its end is
visible in the Bowden tube
5.
Remove the Bowden tube from the print head. First, remove the clamp clip and then
push down on the tube coupling collet while pulling the Bowden tube upwards, out of
the print head.
Con�rm
to continue
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How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
1 of 7 12/15/20, 2:15 PM
Hot pull
1.
Insert the filament into the print head until you feel some resistance
2.
Hold the filament with pliers and gently apply pressure to the material for ±1 second
so that it extrudes from the print core or until it cannot be pushed any further, and
directly pull the filament out with a quick, firm pull
3.
Cut off the tip of the filament that you have just pulled out.
4.
Check the color and the shape of the tip of the filament and compare it with the
image below. The goal is to have a clean tip
5.
Repeat this procedure until there is no more degraded material visible on the tip of
the cleaning filament. The tip of the filament should look as clean as the example
below
Caution:
Use pliers to prevent injuries to your hands in case the material breaks.
Caution:
Do not use a needle to unclog the CC print core. If the point of needle
touches the ruby, this can irreparably damage it.
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
2 of 7 12/15/20, 2:15 PM
6.
Once the tip of the filament is clean, manually flush some filament through the print
core with pliers and take it out again.
Con�rm
to continue
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
3 of 7 12/15/20, 2:15 PM
Cold pull
1.
Insert the filament into the print head until you feel some resistance
2.
Hold the filament with pliers and gently apply pressure to extrude some material.
Con�rm
to continue
3.
Maintain pressure on the filament with the pliers for the duration of the progress bar
4.
Release the filament and wait until the print core has cooled down
5.
Grab the filament with pliers and pull it out with a quick, firm pull.
Con�rm
to continue
6.
Take a look at the tip of the filament and see if it has a clean, cone-shaped tip like the
example to the right.
Con�rm
to continue
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
4 of 7 12/15/20, 2:15 PM
Tip:
If the tip of the filament is not clean, go back to hot pull or cold pull to repeat the
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
5 of 7 12/15/20, 2:15 PM
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Reassembly
1.
Insert the Bowden tube into the print head and secure with the clamp clip.
Con�rm
to
continue
2.
Wait for the Ultimaker printer to finalize the cleaning procedure
cleaning steps.
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Print core cleaning maintenance schedule
Print core troubleshooting
How to perform a hot and cold pull
Print core cleaning maintenance schedule
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
6 of 7 12/15/20, 2:15 PM
Cleaning the Ultimaker 3
Check the quality of the silicone nozzle cover
Check for residue in the front fan of the print head
Check the tension of the short belts
How to perform a hot and cold pull – Ultimaker... https://support.ultimaker.com/hc/en-us/articles/...
7 of 7 12/15/20, 2:15 PM
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