D9 Y-Axis belt tensioner for MK2 400mm

thingiverse

Unfortunately bleugh's fantastic belt tensioner doesn't fit the D9 MK2 400mm version, thanks for that by the way: the Y-axis wheels collide with it when moving the bed to something like more than 370mm (which happens during every z-calibration). So I simply moved the outer holes inside and chamfered them to use the original M5x countersunk screws. That gives that small part enough space without having me trim too much of it. I also made the small part a tiny bit thicker, which looks a bit too flexible otherwise - which is also why I removed the text from the big part by the way; sorry about that. Disclaimer: when the bed moves to the outermost y-position there's a chance of scratching the bed-cables since they tend to collide with the belt tensioner. If this happens on a regular basis, your cables could come loose and somehow create a short circuit, which can cause all kinds of unpleasant events like setting your house on fire. I don't want that to happen, so just don't blame me for something like that - blame bleugh! Printed in PET (not PET-G) and annealed at 140°C to achieve ultimate stiffness.