Archives par étiquette : HotEnd

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First use cautions

Introduction

This page  purpose is to help you to check a few points before using your 3D printer in order to avoid any possible known issues.

Check that the stepper motors are properly connected to the stepper drivers on the Electronic board..

Check that the stepper motors are properly connected on your electronic board before powering on. The drivers don’t support to be powered on without any motors attached.

In certain cases you can damage them and the stepper motors will react in a random manner.

Precautions to take before powering your heatbed.

Certains heatbeds can use up more than 200W.

Depending on how the heatbed it driven, you will need to check that the driving power transistor is properly cooled down, and that there is a proper airflow around it.

On Scalar M, the heatbed is conected directly on the power transistor.

It’s mandatory that the 80cm fan inside the electronic box is connected, powered and generates a good airflow.

On Scalar XL, the 700W 220V heatbed is powered through a separate 25A solid state relay.

The 80 cm fan is then used to cool down the stepper motors drivers in order to keep optimal performances.

Keep the stepper drivers always close to ambiant temperature.

Stepper motors drivers are responsible to properly driver the stepper motors. When they get hot, the avaiable power drops and you might get some missed steps after a few hours of printing.

PLA and FullMetal hot ends (E3D or AllInOne)

With Full metal hot ends, if you are using PLA, it’s MANDATORY to keep the hot end’s heatsink cool.

These hot ends are provided with auxiliary fans wich purpose is to keep them close to ambiant temperature.

if the fan is not running, is stopped or that the airflow is not enougth, PLA will expand inside the hot end.

Expnading PLA inside your hot end will, if you are lucky, only expand on a small portion of the hot end. You should still be able to push or pull it from the hotend manually using some pliers.

In other cases, it can expand out of the hot end’s heatsink.

in this case you will need to deassemble the hotend, clean it and fix your fan cooling issue.

Precautions to take before switching off your 3D printer

Some plastics will expand on full metal hot ends if you switch off your 3D printer while the hot end is still hot.

To avoid possible issues with plastic expantion, make sure the hot end temperature goes below 75°C before switching off your 3D printer

Mise en place du ventilateur de refroidissement

Liste des pièces :

  • 2 vis M3X25mm
  • 4 rondelles M3
  • 2 écrous M3
  • 1 ventilateur à compression
  • 1 support de ventilateur compatible GoPro
  • 1 soufflet pour ventilateur à compression

Prenez 1 vis 1 écrou et 2 rondelles ainsi que le support de ventilateur.

 

 

 

 

 


 

Fixez le support de ventilateur sur le trou du ventilateur qui se trouve juste à côté du câble d’alimentation du ventilateur.

Assemblez comme suite: Vis-Rondelles trou–Rondelle – écrous.

 

 

 


La photo vous montre ici l’autre côté du ventilateur au niveau du couple rondelle écrou.

 

 

 

 


Placez tout le montage sur le support compatible au niveau du bloque de tête chauffante. La photo vous montre comment le monter.

 

 

 


Sécurisez l’accroche en utilisant les éléments de fixation restant (Vis M3x25, rondelles et écrou).

Peu importe le sens de la tête de vis.

 

 

 


A présent serrez l’ensemble suffisamment pour que vous puissiez faire pivoter le ventilateur et que ce dernier reste en place.

 

 

 

 


Installez le soufflet du ventilateur comme sur la photo. Ce dernier à pour bus de refroidir et solidifier le plastique qui vient juste d’être imprimé. Il vous sera très utile lorsque vous imprimerez du PLA.

 

 

 


 

Maintenant faites pivoter le bloque et ajustez le bout du soufflet de tel manière que l’air expulsé refroidisse la base de la buse chauffante.

Attention: Si vous l’orientez trop vers le haut, le ventilateur empêchera votre tête chauffante de chauffer et de faire fondre suffisamment le plastique.