# Replace the cracked case {% hint style="success" %} **📅Update: 2020/09/28** {% endhint %} ## 1. Tools 1. M2.5 Hex Key 2. Phillips Screwdriver x 2 3. Tweezers ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIRX8XCu67G2UuoYLO%2F1-DSC03819.png?alt=media\&token=0d4eff05-f171-4d32-bd98-da75950fde50) ## 2. Disassemble the cracked case. ### 2.1 Disassemble the black base. Use an M2.5 Hex Key to unscrew the 6 hex screws. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIRdSxTMwTT4PFgMS8%2F2.1-DSC03785.png?alt=media\&token=3faeabc7-e13f-467b-9d46-2123b7ef68e7) ### 2.2 Disconnect the motor cables, switch wire, and the 5-pin front end signal cable. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIRqLEzqQz7mP9p0dl%2F2.2-DSC03786.png?alt=media\&token=fa30f803-5d11-4801-a067-c77f75521c13) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIISrT_5Ck-hTJxNRek%2F2.2-DSC03787.png?alt=media\&token=0dd93db0-51e6-4e44-9547-10c48c98fd58) ### 2.3 Disassemble the motherboard PCB. Use a Phillips driver to unscrew the 4 motherboard screws. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIISv5Wpw2MrVvivEJy%2F2.3-DSC03792.png?alt=media\&token=d77c15a2-9c05-4743-bec6-3b79088ee16f) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIISxwN8sGdrZzwHVW5%2F2.3-DSC03793.png?alt=media\&token=c0085cb5-f860-4a47-b64b-ba2f5d77cc1d) ### 2.4 Disassemble the base encoder board. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIT-jaqJaISZHM4DvW%2F2.4-DSC03795.png?alt=media\&token=51deb344-6430-4df8-9be7-5349fc822fb1) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIT25k5Zc6-1nRPhBp%2F2.4-DSC03796.png?alt=media\&token=df8161f8-4666-478d-b62b-466f27ddefa5) ### 2.5 Disassemble the base reducer. {% hint style="warning" %} :brain: **Note:** There are four small screws beside the magnet. {% endhint %} ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIT5tN5HUNMP5eFMqq%2F2.5-DSC03798.png?alt=media\&token=5667bc43-75cc-43cb-b3ae-0ee5e4007cbc) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIT8l-K7dzPga9M9qR%2F2.5-DSC03799.png?alt=media\&token=3ac76d8f-e491-4998-8469-3e2e237c60da) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITBer9J9HCJwgLvDk%2F2.5-DSC03800.png?alt=media\&token=0a4dbef3-d689-4b72-99d6-c467a8c8008d) That's all to disassemble the base part. Now let's replace the new case. ## 3. Replace the new case. ### 3.1 Replace the base bearing to the new case part. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITF6RwHC32j4rq72Y%2F3.1.png?alt=media\&token=10616b0d-5e33-4d42-8aae-b925e0f267d9) ### 3.2 Put the motor cables and 5-pin cables through the case. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITJicrG38_qCHxUVS%2F3.2.png?alt=media\&token=88c3971e-c156-424f-9f18-ea4897e0b3bb) ### 3.3 Assemble the reducer. Use the Phillips screwdriver to fix 8 screws. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITNdefOXwrnpObXPl%2F3.3-DSC03803.png?alt=media\&token=746decb3-2801-43c9-a525-6cf2c7325767) If one of the small screws stick on the magnet, use the tweezers to put it back and screw on. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITSHUrs6Bad9cTIor%2F3.3-DSC03805.png?alt=media\&token=9eae0479-0be7-4c1f-b3b3-053622a3ad02) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITUl3FOewUbocFFXK%2F3.3-DSC03807.png?alt=media\&token=1b3244a1-5baa-4569-90b5-6a46914ed872) ### 3.4 Assemble the encoder board. Assemble the encoder board and connect the short cable to the base motor. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITmAKHoh0a_Kb5zNn%2F3.4.png?alt=media\&token=f55bb8c7-49e8-4e7b-b2e4-10d175a53953) ### 3.5 Assemble the motherboard. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIITqrBuM1DrryTUbz5%2F3.5-DSC03810.png?alt=media\&token=ece1d5b5-58f3-41c7-8282-491909369cf9) ### 3.6 Cable connections. Connect the #1, #2, #3 cables to the corresponding port and connect the 5-pin cable and the switch wire. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIU-6zrYrRENaeHrFu%2F3.6-DSC03814.png?alt=media\&token=938cc641-b2a4-4f76-bb98-f2b94fc99ce3) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIU1rm8ezyR-o3nqo-%2F3.6-DSC03815.png?alt=media\&token=d6083580-3bc9-4a05-835e-6eb2e16e81ab) {% hint style="warning" %} :brain: **Note**: be careful and don't break the motherboard. {% endhint %} ### 3.7 Test your DexArm. Connect it to Rotrics Studio, move it to the HOME position and test the font cable with your laser module. ### 3.8 Assemble the black base. ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIU7shiQk9HzBaE7IR%2F3.8-DSC03816.png?alt=media\&token=082b7a41-e9e7-46df-ada3-45dd121e1538) ![](https://2132465959-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LtPFIBncU5l4J8tl5Yh%2F-MIIMtvCiLF2WApKPIXk%2F-MIIUAD0tI3JytqfhFfa%2F3.8-DSC03817.png?alt=media\&token=f59771be-1803-4939-98f4-e1030354c772) Now you've run through all the replacement steps. Have fun making!