Anet A8+ Modified Belt Tensioner
Description
I remixed this to adapt it for my Anet A8 Plus to upgrade the horrible stock tensioner that was prone to breaking. I bought a new pulley/bearing set to replace the stock one as well at the same time so I sized this to fit that. Link to the pulleys I used are below. This will also require a new holder on the back of the gantry carriage. It's important to note that while the whole spacing on the A8 and A8+ are the same, the belt directions are opposite. The A8+ belt has the continuous portion on the bottom. I found the included holder somewhere online, but cannot find where it came from. If it is yours or you know where it is from please let me know and I will link to it here as well. Hardware required for this upgrade include: Tensioner: The x-belt will need to be approx 4in (10cm) longer. Machine Screw 4mm x 30mm with hex nut, two of each. Machine screw, 3mm x 24mm with lock nut (the kind with a plastic insert) New Pullley - https://www.amazon.com/gp/product/B07G833M4L/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Holder: Machine screw M3x6mm, 4 of each Assembly: After printing the tensioner, sand the inside of the rectangular slot, if necessary, until the x-belt pully fits inside loosely. Make sure the 4mm screws fit into the two holes on either side of the slot. Enlarge them with a drill bit if needed. Embed the hex nuts into the block at the hex shaped recesses of the 4mm screw holes: Thread a nut onto the 4mm screw, then hold it with a pair of pliers and heat the nut for 5 to 10 seconds with a small torch or cigarette lighter. Carefully press the nut straight down into the hex recess, then repeat for the other one. Install the pulley into the slot and secure it with the 3mm screw & lock nut. Do not tighten it too much, the pulley needs to be able to spin freely. Mount the completed tensioner, with a new belt, as shown in the photo. Tighten the 4mm screws evenly until you remove all slack from the belt.
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