Homemade CNC Router Build: Achieving Precision and Rigidity
0:00:04 Cutting Parts and Alignment: The video begins with the creator cutting parts for his homemade CNC router, emphasizing the need for alignment and squaring.
0:00:13 Addressing Alignment Issues: The cutting bed was misaligned due to countersunk bolts, which were replaced with socket head bolts for better adjustment.
0:00:37 Leveling: The cutting bed was leveled to within 0.037 inches on the x-axis and 0.032 inches on the y-axis.
0:00:49 Enclosure Modifications: 3D-printed brackets and a polycarbonate front panel were added for a removable side panel and a front enclosure, held in place with magnets.
0:01:15 Chip Prevention: Plastic strips from AliExpress were used to fill extrusion gaps, preventing chip collection, and TPU covers were printed for homing limit switches.
0:01:33 Safety Features: An emergency stop button was added to the front of the machine.
0:01:40 Control System: A cheap touchscreen monitor and a low-spec PC were used for network control via a web interface.
0:02:04 Enhanced Control: A CNC pendant with a jog wheel was added for more convenient control of all three axes.
0:02:33 First Cut and Adjustments: The initial test cut on MDF revealed issues with finish quality and the need for adjustments, such as using appropriate speeds and feeds.
0:02:57 Fixture Plate Creation: A fixture plate was created by drilling, counterboring, and threading 178 holes in an aluminum plate, using a thread end mill.
0:04:43 Z-Axis Modification: The spindle was lowered to accommodate the end mill's reach, which was necessary for cutting through the 20mm thick fixture plate.
0:06:45 Workholding Challenges: A drilling vise was initially used for workholding but caused issues due to its design, leading to part movement during machining.
0:07:17 Part Machining: A rectangular block was machined as the first upgrade part, with lessons learned about rigidity, tool selection, and workholding.
0:09:27 Rigidity Improvements: A larger 6 mm end mill was used for improved rigidity and surface finish.
0:10:35 Workholding Solution: A second block was used in the vise to counteract twisting and improve part clamping.
0:12:19 Future Improvements: Plans include using a proper milling vise, implementing a chip management system, and utilizing a probe for faster and more precise work-piece zeroing.
0:13:47 CNC Pendant Benefits: The CNC pendant was highlighted as a valuable addition for precise movements and ease of use.