Tools/boxford

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Stever (talk) 08:14, 8 September 2018 (UTC)

Boxford 260 VMC CNC Milling Machine

This tool requires induction
Inductionrequired.svg
Owing to it's dangerous nature, delicate nature, or expense, this tool requires that you be inducted on it's proper handling before use.

Introduction

The Boxford 260 VMC Milling machine

The Boxford 260 VMC is an educational model cnc mill that has been upgraded with a modern controller and electronics. The CNC milling machine has a maximum travel of 240mm x 130mm and a vertical travel of 130mm, the spindle is speed controlled from 0-3000rpm. It's suitable for use with Aluminium, Brass, Mild steel (with caution), and most Plastics. The Boxford mill requires induction before you can use it as it is a complex and challenging to use tool.

Current status

Date Status Comment
25th August 2019 Functional/Testing The boxford is out of order pending replacement of the Y-axis driver module and bridge rectifier. The Boxford is undergoing a program of upgrades and improvements, it may be taken out of service at any time with no notice. Currently the boxford is operational.

Machine Details

  • Controller: Custom built smoothieboard
  • Spindle Driver: RS Motor Controller
  • Motor Drivers: Parker Motion SD3

Spindle

The spindle motor controller has been replaced with an RS speed controller.

The DC output from the spindle controller is fed to a Yaskawa contactor configured to control forward or reverse motion. The contactor is mechanically and electrically configured to prevent simultaneous forward and reverse. The DC motor output is fed from the contactor to the spindle motor with a large 10mH inductor in series, presumably to compensate for the low inductance of the motor.

The motor is a Lenke 18V DC motor. An optical encoder is mounted on the spindle (50 Pulse/rev).

Limit Switches

Product Number: IS-3002-ANOG

Boxford Caretakers

Inductions

An induction needs to be written for the Boxford.

Workshops

None yet, would you like to start a workshop?

Maintainers

Toby-W maintains the Boxford and should be contacted to report any issues.

Recent Changes

  • Phase-1 rewire completed, boxford returned to service. Stever (talk) 02:12, 25 August 2019 (UTC)
  • Rewire continues but we lost a driver and the bridge rectifier to an unexpected ground-return loop. Stever (talk) 02:58, 19 August 2019 (UTC)
  • The stepper driver has been repaired, boxford is functional again. Stever (talk) 10:55, 27 September 2018 (UTC)
  • The x-axis stepper driver has failed under test, is being investigated to determine if it can be repaired or replaced Stever (talk) 20:11, 23 September 2018 (UTC)

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