3ntr A2v2 - Part Contamination and Color Issues; Part Size and Dimensional Accuracy; Print Completion and Layer Issues; Axis Movement and Homing Problems

#3 – Part is contaminated by support material / Color separation is not sharp
• Extrusion temp is too high
When an extruder is deselected, the higher temperature makes for liquid polymer state (aka: oozing) than flows
out of nozzle due to gravity. Decrease printing and/or preheating temperature
• Print speed is too high
Residual nozzle pressure isn't neutralized with retraction. Slow down printing speed
• No nozzle priming strategy enabled
Use one of the possible solution (prime pillar, wall, …) that let you keep a cleaner part
• Bad Z nozzle leveling
Be sure to correctly perform the calibration of Z nozzle alignment
• Bad XY nozzle alignment
Be sure to correctly perform the XY nozzle alignment
#4 – Part is bigger / smaller than expected
• Polymer has higher than expected shrinkage ratio
Increase you part size or change polymer
Lower printing temperature (if possible)
Use part ventilation
Use heated chamber
#5 – Print is not completed
• There is a vertical gap between part and nozzles
Nozzle jam: see point #1 of this list
• Part is at nozzle level
(if printing as PC peripheral) Problem with Usb connection (cable near electrical noise sources such as motors,
power transformers,...): change cable routing or buy a shielded one
(if printing as PC peripheral) : system rebooted (i.e. OS or antivirus update) or wrong power saving settings
AC power interruption: use an UPS suited for the printer power rating
#6 – During homing, axis * doesn't stop and collides
• Problem with homing sensor (endstop) cabling
Be sure that endstops are not engaged. Send the M119 command: printer will answer with endstop status.
Now push on each sensor, while sending the M119 command: the sensor status must correctly tell the status
(ENGAGED). If not true, check sensor cabling and connectors (Y sensor has also a connector on the printhead)
on the motherboard.
• Damaged endstop
If previous step doesn't give any result, the endstop may be faulty giving erratic output: replace it.
• Firmware problem
If you just upgraded firmware, you may have loaded the wrong version for your printer. Get in touch with tech
support.
• Damaged motherboard
Motherboard may have a defective part (i.e.: cold solder joint). Need to be replaced.
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