CNC Router

Description

We currently have a under construction C BEAM based CNC Mill. The mill took its first cut on 20/02/2016.

The CNC Mill is based on the C BEAM profile from open builds, it is currently a X/Y table type "C BEAM MACHINE" thats 400x400x120mm but we have all the parts to make it a 1000x750mm gantry style ASAP.

Specifications

• 800W water cooled spindle 220V 6.5A ER11 collets
• 1.5kw VFD capable of 3000-23000 rpm
• 3.2Mn NEMA 23 steppers
• 20V 4 A power supply
• 2.5A Stepper drivers
• Control via GRBL running on a arduino CNC sheild
• Raspberry PI serial to JSON server making the CNC shield available on chillipeppr
• 400x400x120mm workspace

Configuration

Send the command $$ to GRBL to read the current configuration

• steps/mm (all axis) = 100
• Accel X
• Accel Y
• Accel Z
• Max Rate X
• Max Rate Y
• Max Rate Z

Pledges

A pledge tracker can be found on this google sheet [1]

Design

The first machine is a 'out of the box' C Beam Machine kit [2]. This is a X/Y table machine based on the C Beam aluminum profile which offers better stability and accuracy than OX type v slot or shapeoko.

This kit will be used to make the plates for its own upgrades into our specific 1000mm x 750mm gantry style machine with dual X drive based on this design. [3]

Parts Status

We have purchased the majority of parts from Colin at robocutters.co.uk[4], he offered a wealth of advice, a great discount and is genuinely interested in supporting Hackspaces.

• A C Beam machine kit
• 3 NEMA 23 Motors
• 1 1000mm linear actuator kit
• 1 750mm linear actuator kit
• 4 750mm 60 aluminium profiles
• 16 wheel kits

From China we ordered as a kit:

• 800W 60mm mount water cooled spindle
• 1.5kW VFD
• 12 VPump
• Various collets

From other sources:

• 6 C.P type limit switches (swwils)
• Radiator (swwils)
• 4 Core spindle cable (swwils)
• RUMBA Board + Drivers (Martyn)
• E-stop (Aidan)
• 36v 10A PSU (Aidan)

Build

• First cut occurred
• Safety and software phase started

Software Proposals

GRBL vs TINYG [5]

CAM [6]