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<<< CNC v3.1 (Printer)         CNC v3.2.1 >>>

CNC V3.2 - Router

The video about the first run of CNC v3.2


Basic build instructions


Cutting fluid


Mechanics

Mechanics of the CNC router
Figure 1:
Even if the machine made it's first run, it is still in an experimental state and work on the design goes on.

Parts list


Part Number Remark
Steel square tubes
20x20x2000mm, 2mm wall thickness
20 Framework
Flat iron bars
20x4x2000mm
10  
Screws M6x10mm 400 Preferably with round head for hex or torx tools
Nuts M6 100  
Split washers M6 400  
Ball bearings
10x30x9mm
45  
Ball bearings
6x19x6mm
10  
Threaded rods
6mm, 1m
3  
Sheet metal
300x500x0.75mm
1  
Plywood
300x600x5mm
1 Gear disc
Pump 12V 1 Cutting / coolant
e.g. windscreen washer system


Samples

Cutting and engraving acrylic plastic with the CNC router
Figure 2:
Engraving and cutting acrylic plastic works fine.
Processing plywood with the CNC router
Figure 3:
Same is for plywood.
Cutting circuit boards with the CNC router
Figure 4:
The copper plated board bends and vibrates when cutting the traces. I will implement a special mount for this kind of job. Nonetheless the result isn't bad.
The 16 rings on the bottom left are arranged on a 2.5mm grid as used with prototyping boards.
Processing aluminum with the CNC router
Figure 5:
Processing aluminum works fine, but there is still space for improvement. I will implement a water pump for a circular flow of coolant so that the chipping is removed. With that I hope to get smoother edges.
Processing aluminum with the CNC router
Figure 6:
Engraving glass at the first test run. It's the Hackaday logo.
Processing aluminum with the CNC router
Figure 7:
Carving another piece of aluminum with a 3.2mm router bit at the end of the video about the build process of the mechanics.

Electronics

Mechanics of the CNC router
Figure 8:
An Arduino and two doubble H bridges are needed to control the machine in the low power configuration I am using in the first videos. More ways of driving the machine will follow (e.g. using bipolar stepper motors).

Software

The software is part of the Download package. It is in an experimental state and can currently process nothing but Scalable Vector Graphocs (*.svg). I will implement G-code functionality in the machine electronics soon.


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