If your component has holes and defects on the surface or walls caused by too little material being extruded, this is called underextrusion.

In this case, please check the following points:

• How long has the filament been in use, and when was it last changed? If the filament is damp, please replace it.
• Is the filament free to unwind from the spool and unwinding from the top of the spool? Is there no filament tangled in the drybox?
• Does the Drybox adapter show no signs of wear, such as a slotted hole? If there is a slotted hole, you can rotate the adapter slightly so that the filament feeds through normally again, and you should replace the adapter.
• When was the loading hose (drybox > conveyor) last replaced? Does it show signs of wear, or is it under excessive tension or severely twisted?
• When was the conveyor hose (conveyor > print head) last replaced? Does it show signs of wear?
• When was the nozzle last changed?

Optionally, you can also run the Underextrusion Utility on your printer: Menu > Utilities > Maintenance > Underextrusion Troubleshooting

A worn plastic nozzle can be identified by the print results. If defects similar to those in the following image appear on the walls, the plastic nozzle should be replaced.

The fiber nozzle has four wear indicators on the tip. When the wear reaches the notches on the tip, the fiber nozzle should be replaced.

The plastic and fiber nozzles should be replaced every 1000 printing hours to prevent printing complications.

If you have connected your printer to the Internet and a yellow exclamation mark is displayed next to the connection icon, or if “Seeking Eiger” is displayed in the connection prompt in the Network Manager (Menu > Settings > Network Manager > “Offline”), this may be due to the following reasons:

• Firewall: Please have your IT department check the following ports. Communication on one of the ports is blocked, preventing the printer from connecting to the cloud.
  

  Hostname	port	Protocol	Needed	Task
  s3.amazonaws.com	443	TCP	Yes	Printer operation
  mfeigerproduction.s3.amazonaws.com	443	TCP	Yes	Printer operation
  cdn.eiger.io	443	TCP	Yes	Printer operation
  www.eiger.io	443	TCP	Yes	Printer operation
  *.pool.ntp.org	123	UDP	Yes	Network Time Protocol
  ipv4.connam.net	80	TCP	no	Online status check
  data.logentries.com	443	TCP	no	Remote logging
  data.logentries.com	10000	TCP	no	Remote logging before Sept. '18

Tolerance variations and inaccuracies can depend on several factors, including part geometry, belt tension, print bed leveling, and bearing/linear guide condition.

If your printer does not print components accurately, please follow the steps below:

– Leveling the build platform and then printing the bed level test print for verification
– Check the belt tension
– Check the bearings for damage and replace them if necessary
– Check the linear guide and relubricate if necessary

The z-offset is important for the printer to know where the lowest and highest positions of the bed are. It should be set during initial setup and whenever a new print bed is used.

• The nozzle must be clean.
• First, start by setting the z-offset if you haven't already done so on your current print bed. This tells the printer where the top and bottom positions of the bed are.
• The feeler gauge on the plastic nozzle (labeled PLASTIC) should make a slight scratching noise when moved back and forth. It must be a bit tighter than usual.
• The feeler gauge of the fiber nozzle (labeled FIBER) should have very little resistance. Therefore, it's better to set the fiber nozzle too far away from the print bed than too close.
• Check the bed adjustment with the Bed Level Test Print
• Check the fiber nozzle setting with the staircase.

• Manually heating the nozzle
  Utilities > Manual Control > Temperature Control > Heat > Plastic
• Wait until the temperature reaches 275 °C.
• Switching off the nozzles
  Utilities > Manual Control > Temperature Control > Cool > Plastic
• Remove the dirt with the brass brush until a temperature below 200 °C is reached.

A dislocation error is generated by the printer when it detects that the print head is no longer positioned correctly during the reference run (on the desktop series, every 5 layers in the back right corner). In this case, the printer aborts the print to avoid wasting more material.

The following causes can cause a dislocation error:

1. Incorrectly leveled print bed
   Remedy by re-leveling the print bed and then running the bed level test print.
2. Too little or wrong glue used
   Remedy by using enough glue, which is recommended by Markforged (Elmer's glue, purple)
3. Worn bearings
   Check for any clicking noises coming from the idler rollers as the print head moves. Are there any black dust spots on the idler rollers?
4. Underextrusion: Please print the purge line once (Menu>Utlities>Test Prints>Wet Plastic Purge) and send us a picture of it.

If the print head can no longer build up the temperature correctly, the following must be checked:

1. Flex cable installed correctly.
   It often helps to detach and reattach the flex cable from the print head. Then clear the errors.
2. Flex cable damaged.
   Sometimes the flex cable may be damaged. If you notice a kink or a mark in the flex cable, it may need to be replaced. Please contact Mark3D support for assistance.
3. Onyx discontinued
   To check this, loosen the two screws securing the white print head cover and fold the cover back. If you see Onyx behind it, the print head is defective and needs to be replaced. Please contact Mark3D support for assistance.
4. Motherboard defective
   In rare cases, the motherboard may also be causing the problem. This can usually only be determined by replacing it.

In most cases, this is due to a clogged nozzle. To resolve this, follow these steps:

• Manually heating the nozzle
  You can do this via Utilities > Manual Control > Temperature Control > Heat > Plastic.
• Removing the guide tube from the print head
  To do this, loosen the knurled screw on the plastic tube on the print head.
• Removing the nozzle
  You can remove the nozzle using the supplied torque wrench
• Checking the guide path on the print head
  If you now look from above into the plastic guide channel on the print head, you should be able to see all the way to the bottom of the printer.
• Cleaning the blockage
  Use a long, thin rod or a thin Allen key to go through the guide channel and remove all remaining material from the guide channel.
• Changing the nozzle
  Now screw in a new nozzle. To do this, use the program Utilities > Maintenance > Replace Plastic Nozzle and follow the instructions. Remember to apply graphite paste to the thread of the new nozzle.
• Mounting the guide hose
  Reinstall the guide tube and tighten the knurled screw.
• Print the PurgeLine for control
  If you now print the PurgeLine under Utilities > Test Prints > Wet Plastic Purge Print, the material should flow as usual again.

Identify the defective bearings

To determine which bearing is defective, move the print head back and forth. If the rattling occurs only in the x-direction and not in the y-direction, it is the rear right bearing. If the rattling occurs only in the y-direction and not in the x-direction, it is a bearing under the crosshead. If it occurs in both the x and y-direction, it is the front left bearing. In rare cases, multiple bearings are affected.

General information on sub-extrusion

There are two types of underextrusion:

• Underextrusion occurs without conveyor cracking.
  This case is very rare and indicates that the conveyor most likely needs to be replaced.
• The conveyor cracks when creating the component
  The conveyor always cracks when it reaches the torque limit. As soon as this happens, the motor retracts the material a few millimeters and then feeds again. This prevents the material from being worn down by continuous feeding. A cracking noise from the conveyor always indicates that the conveyor itself is working properly and the source of the problem lies elsewhere. The cause is usually excessive resistance when conveying the material, which can be caused by the following:
  • Resistance in the guide hose (hose from the conveyor to the print head)
    This is a very common cause. Due to the abrasive nature of Onyx, the conveyor hose wears down over time. This leads to increased friction and thus increased friction within the hose. Replacing the hose can help. The hose is part of the all-round carefree package. If your printer has one, you'll receive one free of charge.
  • Resistance due to worn nozzle
    A worn nozzle is also often responsible for under-extrusion. We recommend changing the nozzle every 6-8 rolls of Onyx (or 1000 printing hours). (You can find the number of printing hours in the menu under Settings > System Info > Trophy Icon.) The nozzle is not included in the all-inclusive package and must be purchased separately.
  • Resistance due to hooked coil in the drybox
    Sometimes the spool in the drybox won't move freely and gets stuck. Often, removing and reinserting the spool helps.
  • Resistance due to a kink in the charging hose
    If the loading hose has a kink or tight radii, the resistance in the loading hose increases. To test whether the problem is with the loading hose, you can disconnect it from the conveyor and remove it from the printer. Then unwind the material by hand and let it feed into the conveyor without resistance. Now let the printer print a new job and see if the underextrusion disappears. It is important to run a new print job here, as underextrusion (and thus unclean printing) in the lower layers ensures that the upper layers are not printed cleanly and is very likely to lead to underextrusion.
  • Incorrect or unleveled print bed
    If the print bed has not been correctly leveled using bed leveling, there is a risk that the distance between the print bed and the nozzle will be either too large or too small. This can result in print bed damage due to the nozzle scraping on the build platform if the distance is too small, or in non-adherent components if the distance is too large.
  • Blockage in the print head
    Cleaning the print head

We'd be happy to help you quickly determine the cause of the underextrusion. Simply contact our support team at support@mark3d.de.

The X-Series offers the following advantages

other belt drive

While the Desktop series uses two belts, the X-Series has only one belt, guided in an H-shape. The H-shape allows the drive encoders to be calibrated, resulting in greater accuracy.

Desktop drive:

X-drive:

finer resolution

The Desktop series achieves a layer resolution of 0.1 mm, while the X-series achieves a resolution of 0.05 mm. This gives the components a finer, smoother surface.

integrated laser

The integrated laser in the X-Series enables perfect alignment of the print bed regardless of operator influence.

automatic adjustment of the print bed

Before each print, the print bed leveling is checked. Calibration lines are used to automatically adjust the nozzle distance to the print bed.

larger installation space

Desktop Series (W x D x H): 320mm x 132mm x 154mm
This makes a volume of 6.5 liters

X-Series (W x D x H): 330 mm x 270 mm x 200 mm
This makes a volume of 17.8 liters (factor 2.7)

The conveyor always cracks when it reaches its torque limit. As soon as this happens, the motor pulls the material back a few millimeters and then feeds again. This prevents the material from being worn down by continuous feeding. A cracking noise from the conveyor always indicates that the conveyor itself is functioning properly and the problem lies elsewhere. The cause is usually excessive resistance when conveying the material.