¶ 1.Return the filament:
¶ Step 1: Click "Retract"
Please click the "ACE1" from the display screen, select the filament and click "Retract" to observe whether the filament can be returned to ACE Pro.
¶ Step 2: Manually return the filament
If the filament cannot be returned to the ACE Pro, please loosen the pneumatic head on the back of the printer to check that the filament can be pulled out manually.
¶ 2.Check the hotend:
¶ Step 1: Check whether the hotend is blocked
If the filament cannot be manually pulled back to ACE Pro, the filament is blocked in the hotend. Please follow the steps below to clear the blocked material:
(1)Remove the print head module case, and then remove the model cooling fan connection cable.
(2)Remove the blue fixing clip, press the quick connector, and remove the teflon tube.
(3)Press the cutting knife to cut off the filament.
(4)After pulling out the filament, heat the nozzle to 250 degrees, and then use a steel needle to dredge the nozzle, and then connect the teflon tube back to the print head.
(5)Connect the cooling fan cable, install the print head module housing, and click "Resume printing".
¶ 3.Check the feed path:
If there is no blockage in the extruder, but the consumables cannot be pulled back to ACE Pro, the resistance of the feed path is too high and should be checked by following the steps below.
¶ Step 1: Check the teflon tube
If the teflon tube above the print head is bent too much, it may cause the resistance of the consumables in the teflon tube to be too large to be pulled back into the ACE Pro. Please try to straighten the material tube or print auxiliary support mounted on the print head, which can reduce the resistance of the material return.
¶ Step 2: Check the filament tracker module
If the filament can be returned to the teflon tube above the printhead, but not to the ACE Pro, please check the filament tracker module according to the documentation below.
Kobra S1- Filament tracker module replacement guide
¶ Step 3: Check four in and one out component
If the printer is used for a long time, there may be consumable debris in the four-in-one-out component, resulting in excessive resistance to material return. Please follow the following document to disassemble four in one out cleaning supplies.
Kobra S1-Four in one out component replacement guide
¶ Step 4: Check the hardness of the consumables
Because TPU hardness is low, it is not possible to use ACE Pro feed. Please check whether the consumables in ACE Pro are low or high hardness, and then replace the filament to check whether it can be returned normally.
¶ 4.Check the extruder:
¶ Step 1: Check whether there is broken filament in the extruder
If the filament pull back the ACE Pro, but the printer still reports this error, there may be broken filament in the extruder. Please disassemble the extruder according to the following documents to check whether there is any broken material and whether the material break detection sensor is working properly.If there is no broken material in the extruder, please check whether the pendulum is returned to the original position as shown below.
Kobra S1- Printhead material break detection board replacement guide
If the pendulum and spring pop out accidentally when removing the broken material detection plate, please follow the following steps to install:
(1) Use tweezers to clamp the spring back to the position below.
(2) Then place the pendulum over the spring with tweezers and align the buckle of the pendulum.