CNC Drag Knife (SLA Optimized)

thingiverse

This versatile drag knife can be used to cut a wide range of materials with ease, making it an excellent substitute for a utility knife in any CNC router setup. Its compact design allows it to fit seamlessly into most CNC machines available on the market today. The tool's innovative design leverages the cost-effectiveness of utility knife blades, significantly reducing the expense associated with consumable blades. This clever approach makes it an attractive option for those seeking to minimize their expenses without compromising performance. To secure the drag knife in place, a simple clamp can be used. For instance, when working with a Stepcraft CNC machine, users may need an adapter that reduces the diameter from 43mm to 20mm (available at https://shop.stepcraft-systems.com/adapter-d-43-mm-d-20mm-proxxon_1). Both blade holders feature an adjustable offset of 2mm. However, this value can vary depending on the specific CNC machine and material being used. Generally speaking, if the blade is tilting excessively at corners, it's best to reduce the offset. Conversely, if the blade is undershooting, increasing the offset will help achieve a smoother finish.