Anycubic Mega X - Tensioner for x axis by dfsl

Last crawled date: 3 years ago

This remix makes the belt tensioner now suitable for the Anycubic Mega X, not only for the i3 Mega (S). Thanks to kulfuerst for his pre-work, he deserves the credits.
First of all you will need to drill two 8 mm holes into the right sided steel casing next to the extruder. Dismount the extruder (cap with 3 screws, then 2 screws at the steel casing).The part "hole template" can be used for getting the correct positions. A center punch and predrilling makes things easier.
After drilling, the metal frame can be dismantled screw by screw (16 pcs.). Don't forget to dismount the Z-axis endstops (4 screws). Now you can loosen the M4 screw of the belt pulley. Remove screw and sleeve, these won't be needed anymore (keep it nearby as backup). Try to keep the belt on the pulley.
Grab the dismounted extruder and place it on it's origin. Clip the mounting corner (part 2) into the drilled holes, the extruder should now be held. Secure both the mounting corner and extruder with the screws.
Now the tricky part begins. Prepare part 1 with one M5x40 screw and move it into the steel casing from below. Guide the screw through the upper hole and secure it with a nut. Take the next screw and repeat for the lower hole. After you succeeded, try to get the pulley into part 1. You can use some long tool e. g. screw driver or allen key. Gently press it against the aluminum profile so it fits inside. Now secure it with the M4x12 screw.
Put the M6 nut into the hand wheel, put both into part 3 and screw in M6 bolt. Pre-thighten the belt with the outer nuts and slide part 3 over the M5 screws. Make sure that both screws are at same length before you finish the assembly with the self securing nuts.
I hope you enjoy my work.
Additional needed parts:
1x drill diameter 8 mm (and some smaller drills for predrilling)
1x Screw ISO 4762 - M4 x 12 (cylinder head)
2x Screw ISO 4017 - M5 x 40 (hexagon head)
2x nut M5
2x nut M5 self securing
1x Screw ISO 4017 - M6 x 20 (hexagon head)
1x nut M6
In further updates I will add screws and nuts to the assembly and pictures.