Turnbuckle for M4 nut / rope lock / tensioner

thingiverse

With this turnbuckle you can tighten a rope or lace or string to the desired tension. Just add an M4 hook and an M4 nut to complete. To stabilize my Rostock printer I added diagonal strings to the frame. In order to tighten these I created this turnbuckle. Make sure to tighten all strings evenly so as not to damage the frame. Remember to re-calibrate! I found that when positioning the hotend over the bed I could move it by my hand in a 10mm circle due to the flimsy construction. After adding the diagonal strings this is down to a 3mm circle.