¶ Problem Description
- PVA clogging,PVA roll in gear,PVA extrusion with bubble sound,PVA stringing or PVA non-stick platform.
- TPU clogging,TPU roll on gear,TPU stringing or TPU model stuck on platform cannot be removed.
- Breakaway support for PLA filament clogging,Breakaway support for PLA filament non-stick platform or Breakaway support for PLA filament stringing.
¶ Possible Causes
- For PVA，PVA damp，improper printing parameter setting，first layer non-stick or platform non-stick.
- For TPU，improper setting of TPU printing parameters，use of PEI surface printing or platform coating.
- For Breakaway support for PLA， improper setting of print parameters.
¶ Solution
¶ PVA filament
PVA is dissolvable support for PLA, TPU, PVB and Nylon.
PVA material is a water-soluble material, therefore it absorbs water. When PVA material is exposed to humid environments, it gradually absorbs moisture, becoming soft and bendable，like TPU. However, if PVA material absorbs too much water, its performance may be affected. Over-absorption of water may cause PVA material to become viscous, difficult to print, or produce bubbles and defects during printing.
Therefore, it is necessary to ensure the dryness level of PVA material before use（For example, after unpacking, put it into a filament drying box and keep it dry.） So in the case, the water absorption of the TPU affects the printing performance (please observe whether the PVA is as soft as the TPU to judge, or there is a bubble sound during the printing process). At this time, you need to complete the drying of the PVA in a dry environment and then print.
¶ Snapmaker 2.0
If using dual extruder to print PVA filament on Snapmaker 2.0, the main printing parameters are recommended:
- Nozzle temperature:215~225℃
- Hot bed temperature:60℃
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.8mm
- Cooling fan:ON
If non-Snapmaker brand PVA filament is used, the PVA filament is relatively soft, or the Snapmaker brand PVA filament has been partially damp and water-absorbing and softened, please refer to the following main printing parameter settings:
- Nozzle temperature:210~220℃
- Hot bed temperature:60℃
- Print speed:≤40mm/s
- Retracting speed:--
- Retracting distance:0mm
- Cooling fan:ON
¶ Artisan
If you use dual extruder to print PVA filament on Artisan, the main printing parameters are recommended:
- Nozzle temperature:215~225℃
- Hot bed temperature:68℃
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.8mm
- Cooling fan:ON
If non-Snapmaker brand PVA filament is used, the PVA filament is relatively soft, or the Snapmaker brand PVA filament has been partially damp and water-absorbing and softened, please refer to the following main printing parameter settings:
- Nozzle temperature:210~220℃
- Hot bed temperature:68℃
- Print speed:≤40mm/s
- Retracting speed:--
- Retracting distance:0mm
- Cooling fan:ON
¶ J1/J1s
If using PVA filament to print on J1/J1s, the main printing parameters are recommended:
- Nozzle temperature:215~225℃
- Hot bed temperature:68℃
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.8mm
- Cooling fan:ON
If non-Snapmaker brand PVA filament is used, the PVA filament is relatively soft, or the Snapmaker brand PVA filament has been partially damp and water-absorbing and softened, please refer to the following main printing parameter settings:
- Nozzle temperature:210~220℃
- Hot bed temperature:68℃
- Print speed:≤40mm/s
- Retracting speed:--
- Retracting distance:0mm
- Cooling fan:ON
¶ TPU filament
Common TPU filaments can be divided into TPU83A, TPU85A, TPU90A, TPU95A, TPU95-HF (High flow) according to the degree of softness to hardness.
¶ Snapmaker 2.0
If you use the original print head to print TPU on a Snapmaker 2.0 machine, it is recommended to print TPU hardness ≥ 95A, that is, the filaments that can be printed are TPU95A and TPU95-HF. When printing TPU95A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Print speed:≤40mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament is wound at the gear during printing, turn off the retraction setting.
When printing TPU95-HF, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
If using Dual Extruder to print TPU on Snapmaker 2.0 machine, it is recommended to print TPU hardness ≥ 90A, that is, the filaments that can be printed are TPU90A, TPU95A, and TPU95-HF. When printing TPU90A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Print speed:≤30mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament is wound at the gear during printing, turn off the retraction setting.
When printing TPU95A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament is wound at the gear during printing, turn off the retraction setting.
When printing TPU95-HF, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Print speed:≤80mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
¶ Artisan
If you use Dual Extruder to print TPU on an Artisan machine, it is recommended to print TPU hardness ≥ 90A, that is, the filaments that can be printed are TPU90A, TPU95A, and TPU95-HF. When printing TPU90A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤30mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament is wound at the gear during printing, turn off the retraction setting.
When printing TPU95A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament is wound at the gear during printing, turn off the retraction setting.
When printing TPU95-HF, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤80mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
¶ J1/J1s
If TPU is printed on a J1/J1s machine, it is recommended to print TPU hardness ≥ 90A, that is, the filaments that can be printed are TPU90A, TPU95A, and TPU95-HF. When printing TPU90A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤30mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament coils at the gear during printing, turn off the retraction setting and remove the machine top cover.
When printing TPU95A, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤60mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
Note: If the filament coils at the gear during printing, turn off the retraction setting and remove the machine top cover.
When printing TPU95-HF, the main printing parameters are recommended as follows:
- Nozzle temperature:210~230℃
- Hot bed temperature:50℃
- Hot bed surface:Glass smooth surface
- Print speed:≤80mm/s
- Retracting speed:20mm/s
- Retracting distance:0.5mm
- Cooling fan:ON
¶ Breakaway support for PLA
Breakaway support for PLA or Breakaway PLA is a kind of support material for PLA based filaments.It has a perfect interface with PLA, strong enough to support it and easily removable by hand. Therefore, it is a material used for printing support, which has different printing characteristics from general PLA materials. Please be careful not to use it as PLA for printing.
¶ Snapmaker 2.0
When using the Dual Extruder to print Breakaway PLA/Breakaway support for PLA on a SnapMaker 2.0 machine, the main recommended printing parameters are as follows:
- Nozzle temperature:220~230℃
- Hot bed temperature:60℃
- Print speed:≤80mm/s
- Retracting speed:35mm/s
- Retracting distance:1mm
- Cooling fan:ON
¶ Artisan
- Nozzle temperature:220~230℃
- Hot bed temperature:68℃
- Hot bed surface:PEI surface
- Print speed:≤80mm/s
- Retracting speed:35mm/s
- Retracting distance:1mm
- Cooling fan:ON
¶ J1/J1s
- Nozzle temperature:220~230℃
- Hot bed temperature:68℃
- Hot bed surface:PEI surface
- Print speed:≤80mm/s
- Retracting speed:35mm/s
- Retracting distance:1mm
- Cooling fan:ON
¶ Tools & Accessories Required
If the first layer can not adhere to the build plate, use PVA Solid glue or liquid spray for 3D printing.