Safe box - 3 digit combination

prusaprinters

<p>If you need to secure your precious belongings in a safe place, you found what you were looking for. This safe is secured by a 3 digit combination to prevent anyone from opening it (unless they have a hammer or a heat gun, I mean it's just plastic at the end)&nbsp;</p><p>This is kind of a long build but it is perfect to learn how a combination safe works.&nbsp;</p><figure class="image"><img src="https://media.printables.com/media/prints/259699/rich_content/f5d5920d-940a-49cf-93b1-d35a772ac46c/ezgifcom-gif-maker-2.gif#%7B%22uuid%22%3A%2231e3e523-7053-48a3-982e-4cf12a0ac1e3%22%2C%22w%22%3A600%2C%22h%22%3A338%7D"></figure><h4>Printing instructions :</h4><p>Start by printing all the parts I provide, I used PLA with 0.2mm layer height and 20% infill for everything and non support.</p><p>For some part the printing orientation is quite important for the strength, so this is the orientation for the parts you may have a doubt with :</p><p>Both axle are printed on the side for better strength :</p><figure class="image image-style-align-center image_resized" style="width:49.05%;"><img src="https://media.printables.com/media/prints/259699/rich_content/f7ebaab5-3779-4816-b24e-0761283d6b60/2022-08-16_18-51-13.jpg#%7B%22uuid%22%3A%226565d5f8-5896-484a-8405-0edf95223aab%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><figure class="image image-style-align-center image_resized" style="width:48.19%;"><img src="https://media.printables.com/media/prints/259699/rich_content/0acb844c-4234-4908-ac94-06cf01f62f36/2022-08-16_18-53-22.jpg#%7B%22uuid%22%3A%222c8347a8-05e3-4717-b923-9e9b47a03c8e%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><p>The lever is printed like this :</p><figure class="image image-style-align-center image_resized" style="width:50%;"><img src="https://media.printables.com/media/prints/259699/rich_content/87e2530e-0c98-41d6-9e2f-c99b297815f3/2022-08-16_18-56-02.jpg#%7B%22uuid%22%3A%225e6bb8b1-f9b4-43f7-b0c7-0c0c6d7c66c5%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><p>Both pivots are printed on the side :</p><figure class="image image-style-align-center image_resized" style="width:50%;"><img src="https://media.printables.com/media/prints/259699/rich_content/af92bd15-eb56-4751-ae1a-d29cd3c9ec1e/2022-08-16_18-57-19.jpg#%7B%22uuid%22%3A%226c0c4a5b-a9e9-4cec-8c71-cb9394c3da80%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><p>The pins are printed like this :</p><figure class="image image-style-align-center image_resized" style="width:50%;"><img src="https://media.printables.com/media/prints/259699/rich_content/a9e05775-2c7f-45f5-94c6-ebcbfcd46294/2022-08-16_18-56-44.jpg#%7B%22uuid%22%3A%22e397fc09-6930-4a09-94f2-884048b138d4%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><p>The latch is printed like this :</p><figure class="image image-style-align-center image_resized" style="width:50%;"><img src="https://media.printables.com/media/prints/259699/rich_content/53cab067-bfeb-46d0-aca3-6301531ab338/2022-08-16_18-55-33.jpg#%7B%22uuid%22%3A%22849c6371-8a83-4a65-a8cd-95ea1096c795%22%2C%22w%22%3A1390%2C%22h%22%3A920%7D"></figure><p>All the oher parts orientations should be pretty obvious.</p><h4>Building instructions :</h4><ol><li>Glue the dial with the disk_1 through the front_plate :<br><img src="https://media.printables.com/media/prints/259699/rich_content/0723d92d-261f-45e5-b12c-153ab51f3979/image.png#%7B%22uuid%22%3A%22a5f00a85-a39e-412e-ab6e-298629ce2c46%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"></li><li>Add the axle_1, the 2 remaining disks and the spacers, no glue required :<br><img src="https://media.printables.com/media/prints/259699/rich_content/797608cf-4040-4c70-9f4d-5538a6e83ec0/image.png#%7B%22uuid%22%3A%220a445eaf-8faa-4a98-a710-8843b44209ca%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"></li><li>Glue the pins to each disk. On disk_1 and disk_3 the longer part should be facing towards the centre, and the centre pin is the biggest :<br><br><img src="https://media.printables.com/media/prints/259699/rich_content/47d5b599-6240-43c0-a7b0-2515025889af/2022-08-16_14-12-54.png#%7B%22uuid%22%3A%226e2cc0e2-c957-4c93-a62c-836b37d4e488%22%2C%22w%22%3A1922%2C%22h%22%3A1358%7D"><br>&nbsp;</li><li>Glue the knob to the axle_2 through the front plate, and then place the lever on the axle :<br><br><img src="https://media.printables.com/media/prints/259699/rich_content/9aff2047-1051-446e-99f5-4188f84e0e0b/image.png#%7B%22uuid%22%3A%22959863fd-c597-4f75-b86c-6be2e4de9e31%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"></li><li>Close the door assembly by gluing the back_plate to the front_plate :<br><img src="https://media.printables.com/media/prints/259699/rich_content/1d779e60-ca9b-4e43-af04-3f9f2c646d97/image.png#%7B%22uuid%22%3A%22a75c392a-b94e-4649-a720-0b830caea9ea%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"></li><li>Place the latch over the lever's arm and secure it by gluing the 2 latch guides in their dedicated spot :<br><img src="https://media.printables.com/media/prints/259699/rich_content/d74cca01-1c07-4f3e-b87c-c06a4abaa67f/image.png#%7B%22uuid%22%3A%22302d49fc-a784-4d39-a003-ceb34c27da1f%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"><br><br>After this step, the assembly should look like this :<br><br><img class="image_resized" style="width:75%;" src="https://media.printables.com/media/prints/259699/rich_content/bfb73901-7871-4b09-b254-c44da65f9763/image.png#%7B%22uuid%22%3A%2224948dac-c192-4727-8163-4e6776323946%22%2C%22w%22%3A1920%2C%22h%22%3A1440%7D"><br><br>At this point you can figure out the combination by following these steps :<br><br><ol><li>Turn the dial on the lock clockwise three times. This connects the 3 disks together, so they now turn with the dial.</li><li>Continue to turn the dial clockwise until the notch on the disk_3 is lined up with the lever. Stop and look at the dial to write down the first number of the combination.</li><li>Turn the dial counterclockwise for 1 full turn past the first number to engage the middle disk.</li><li>Continue to turn the dial counterclockwise until the notch from the middle disk lines up with the lever and stop to write down the second number of the combination.</li><li>Finally, turn the dial clockwise until the notch from the first disk lines up with the lever. All 3 notches should now be aligned. Write down the third number of the combination. You should now be able to turn the knob and unlock the mechanism.</li><li>Test your combination by unlocking the mechanism without looking at the disks. You can follow these instructions if you don't know how to : https://www.google.com/amp/s/www.wikihow.com/Open-a-Combination-Lock%3famp=1</li><li>Keep the numbers of the combination somewhere as it will never change.<br>&nbsp;</li></ol></li><li>Glue the 2 pivots to the door assembly :<br><img src="https://media.printables.com/media/prints/259699/rich_content/d0270b95-7016-42cd-ba74-dddd79de33e1/2022-08-16_14-12-30.png#%7B%22uuid%22%3A%22dbe450b3-d623-47fa-849e-0943c60ba52d%22%2C%22w%22%3A1922%2C%22h%22%3A1358%7D"></li><li>To assemble the box start by placing the top and bottom walls on the pivots (no glue) :<br><br><img src="https://media.printables.com/media/prints/259699/rich_content/9c0ac323-fa50-416f-86b3-07e1119ff09a/image.png#%7B%22uuid%22%3A%226f311474-d285-41ac-ace7-cec181bde4f6%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"><br>&nbsp;</li><li>Glue the 2 side walls :<br><img src="https://media.printables.com/media/prints/259699/rich_content/e31fdf45-be45-4ee5-bdee-c3633eb2795f/2022-08-16_14-13-29.png#%7B%22uuid%22%3A%221e0bb226-d0a7-4c09-9871-e584d49bb6a6%22%2C%22w%22%3A1920%2C%22h%22%3A1359%7D"><br>When gluing the sides, do it with the door closed so you can see that everything is well centered.<br><br>At this point you should test to lock and unlock the door a couple of times to test the combination before gluing the back_wall.<br>&nbsp;</li><li>When you are sure of the combination you can glue the back_wall to finish the safe :<br><img src="https://media.printables.com/media/prints/259699/rich_content/80269c6d-be09-4124-99ce-bbca537ab4ff/image.png#%7B%22uuid%22%3A%220051acc2-d344-4336-88ee-481c55cd8154%22%2C%22w%22%3A1920%2C%22h%22%3A1358%7D"></li></ol><p>&nbsp;</p><p>&nbsp;</p>