Anet A6 Belt Tensioner X Axis upgrade

thingiverse

Hey, I've made an upgrade to the belt tensioner that was made by Kingmiwok. The pulleyblock was not stable enough and had too much space to move around. I hope you can appreciate this adjustment and of course credit to Kingmiwok for giving me this idea. Here is a summary from Kingmiwok with all the things you should know: Summary The original belt tensioner by vernierroger is a very clever idea/design. However, I had some trouble fitting the internal components into my A6 X carriage. Also, I was confused as to what hardware (nuts and bolts) I was supposed to use to make it all work. So, I re-worked it using vernierroger parts as the starting point. I made a little more space for everything and changed the design so you could use spare nuts and bolts that came with the A6 printer to assemble it (instead of having to go to the hardware store and buy something). In detail: The "edited frame" remains the same. I modified the tendeur/stretcher slightly (I call it "pulley block") to accommodate the nuts and bolts I wanted to use. For the pulley axle, I used a spare M3x30 flat head bolt (cut to approximately 15 mm of thread) and M3 nut. For the tension bolt, I used another M3x30 flat head bolt with a nut jammed up against the head. I pushed the tension bolt down into the slot on the pulley holder. (It's a tight fit, but it needs to be so it does not rotate.) I made the pulley block slightly less tall as well, so it does not bind against the top and bottom plates. Once printed, I filed the sides of the pulley holder just a bit, so it slides smoothly. I modified the "knob", so you can put a hidden M3 nut inside of it. Start the print and figure out then it's going to be about 80 percent complete. That's when you'll put the nut inside. When it starts making the hex-shaped space for the nut, get ready. Wait until the space for the nut is about 2mm deep (about the thickness of a nut) and then pause the print. As the print head moves away, put an M3 nut into the cavity and then restart the print. The print head will come back and print the remainder of the knob around the nut. I made a video but unfortunately, it's not very good quality. Hopefully, it will still help to demonstrate this explanation. https://youtu.be/07crnQ8DOuU Since the nozzle oozes some filament while you pause, you may get a small defect in your print. To minimize this, I give the filament a little shove into the print head when it's on its way back. It also helps to slow down the feed rate on the printer when you do this process, so you don't miss the opportunity to place the nut. To do that on an A6, turn the controller knob CCW while it's displaying the main information screen. In addition to the printed parts you will need: 2x M3x30 flat head bolts (Anet A6 spare) 2x M3 nut (Anet A6 spare) (You will gain 3x nuts and 1x bolt from the parts you take out.)