Before inserting the nut into the core_xy_belt_grabber, test fit the M5 nylon locking nut on the M5 screw. When the nylon part is engaged, it may require high torque to turn. The torque can be high enough to split the core_xy_belt_grabber or erode the plastic where it holds the nut. You can tune this nut to reduce the torque. To do that, thread an M5 screw through the nut and nylon part. Heat the nut on the screw briefly with a heat gun. Start with a short time of heating. Allow the nut to cool, then test the torque. The longer you heat the nut, the looser it will be after cooling.
After adjusting tension a few times, the nylon locking nut may erode the surrounding plastic, leaving it to turn freely. Consider applying a hard epoxy to fix it in place or replacing the 3D printed part with a longer one that keeps the nut outside the toolhead back assembly.
The long M3 holes on "PP000290-rr_toolhead_vc3_front_beta2.stl" are slightly undersized when the part is printed in ABS (as of 3/14/2024). Drill them with an M3 drill at low speed.
Before inserting the nut into the core_xy_belt_grabber, test fit the M5 nylon locking nut on the M5 screw. When the nylon part is engaged, it may require high torque to turn. The torque can be high enough to split the core_xy_belt_grabber or erode the plastic where it holds the nut. You can tune this nut to reduce the torque. To do that, thread an M5 screw through the nut and nylon part. Heat the nut on the screw briefly with a heat gun. Start with a short time of heating. Allow the nut to cool, then test the torque. The longer you heat the nut, the looser it will be after cooling.
The M3x50 screw has no threaded part to join. I assume it's purpose is to add strength to the cable guide tower.
The Nidec 4028 fan blows toward its label side. Install the fan with the label facing down.
After adjusting tension a few times, the nylon locking nut may erode the surrounding plastic, leaving it to turn freely. Consider applying a hard epoxy to fix it in place or replacing the 3D printed part with a longer one that keeps the nut outside the toolhead back assembly.
The Nidec fan blows toward the label, so attach it with the label facing the hotend.
If using the toolboard mount part "PP000262-rr_toolhead_vc3_ebb42_horizontal" see Step 66 for the M3 screw lengths (40mm and 50mm)
The long M3 holes on "PP000290-rr_toolhead_vc3_front_beta2.stl" are slightly undersized when the part is printed in ABS (as of 3/14/2024). Drill them with an M3 drill at low speed.
Nidec Ultraflow fan has wires out the bottom. Need to either
* Gently take the wires out of the bottom clasp on the Nidec
or
* File a slot in the edge of the "PP000288-rr_toolhead_vc3_back_beta2" part.