Joined diffuser for Canon MT-24EX macro flash

prusaprinters

<p>This big diffuser combines both your MT-24EX flash-heads together to make one single light-source, and allows you to freely position it by joining it to your camera with one or two adjustable ½" Loc-Line arms.</p><p>For the corresponding Loc-Line mount to attach to your camera's tripod thread, please see my other design:</p><p><a href="https://www.printables.com/model/143763-twin-loc-line-arm-mount-for-camera-tripod-socket">https://www.printables.com/model/143763-twin-loc-line-arm-mount-for-camera-tripod-socket</a></p><p>If you'd prefer the two flash heads to be separated, you can use this diffuser design instead:</p><p><a href="https://www.printables.com/model/143772-diffusers-for-canon-mt-24ex-twin-flash">https://www.printables.com/model/143772-diffusers-for-canon-mt-24ex-twin-flash</a></p><h4>Bill of materials</h4><ul><li>¼"-20 hex nut x 2 pieces</li><li>¼"-20 x ¾" long button-head screw x 2 pieces</li><li>Loc-Line 1/2" Fixed Mount x 2 pieces (part number 51895)</li><li>Loc-Line 1/2" Double Socket x 2 pieces (part number 51811)</li><li>Enough Loc-Line 1/2" segments to make the arms the length you like, I used 8 segments per arm, plus the double-socket.</li></ul><h4>Printing instructions</h4><p>Print in white PLA with layer height 0.2mm and 2 perimeters.</p><p>Enabling "brim ears" is highly recommended, as it helps keep the two sharp corners at the front of the model from warping off the bed.</p><p><strong>The bottom (diffuser) face needs to be printed as two 0.1mm layers</strong> rather than one single 0.2mm layer, as this will prevent it from splitting along its layer lines.&nbsp;</p><p>To do this in PrusaSlicer you can right-click the model and click “Height Range Modifier”. Make the modifier start at 0.0mm, end at 0.2mm, and have a layer height of 0.1mm. On the Print Settings tab, on the Slicing page, set the First Layer Height to 0.1mm.</p><p>I bumped my flow up to 105% during printing the first layer to ensure the it was fully joined together, with no gaps between extrusion lines. Afterwards I dropped it back down.</p><p><strong>Add a colour change/pause </strong>at 18.70mm. When the printer pauses here, you can insert one hex nut into each of the two loc-line mounts at the bottom before resuming. The nut should have a flat side pointing upwards (not a corner). Ensure the tops of the nuts lie below the printed part, or else the nozzle will crash into them on the next layer.</p><figure class="image"><img src="https://media.printables.com/media/prints/222617/rich_content/3fb3f3a6-1c61-4cee-a3a4-c815857eb3eb/insert-nuts.png#%7B%22uuid%22%3A%228d302c55-84be-49ac-aca3-80c19fd81d47%22%2C%22w%22%3A1756%2C%22h%22%3A1114%7D"></figure><h4>Assembly</h4><p>Join <strong>two</strong> arm segments to a fixed mount. This requires a lot of force, so sometimes it helps to warm the sockets up using a hairdryer or by dunking them in boiling water to make them more flexible. Keep the heat away from the PLA printed parts!</p><p>Now push the fixed mount with the two arm segments onto one or both of the diffuser's mounting fins (I populated just the left side), and drop a screw through the two segments and screw it into the mount to secure the arm. <strong>We're joining these two segments with the fixed mount before attaching it to the diffuser</strong> to reduce the amount of pushing and pulling we have to do against the diffuser itself to join arm segments to it later, since it's relatively fragile.</p><figure class="image"><img src="https://media.printables.com/media/prints/222617/rich_content/6236704f-2070-4d24-a94c-1cdac0e8c5d6/assembled.png#%7B%22uuid%22%3A%221435061c-dd35-4604-97a2-93ab66cb91bb%22%2C%22w%22%3A2470%2C%22h%22%3A1216%7D"></figure><p>Now we have those two segments there to grab onto, you can join additional segments and the Double Socket to make the arm and to allow it to join to a fixed mount on the other side.</p><p>The two MT-24EX flash heads should just push into their sockets with a "click", this engages with the two little mounting slits on either side of the flash head.</p>