Shapeoko2 Standard Operating Procedures

Purpose

This document provides safety guidance and operating instructions for operators of the Shapeoko 2.

Background

The Shapeoko 2 is a CNC router which can be used to cut materials into very precise shapes. It is controlled via computer; instructions are uploaded from CAD software and then executed by the router.

Authority and Responsibility

Wouter Deconinck (757-221-3539) is responsible for the operation of the Shapeoko in conformance with this Standard Operating Procedure (SOP). In his absence, Joshua Erlich (757-221-3763) shall assume these responsibilities.

Anyone who wishes to use the Shapeoko must go through a safety training process first. See the section below for information on training.

Hazard Analysis

Hazard Identification

1. Eye Hazard from flying splinters
2. Skin Hazard from flying splinters
3. Bodily damage hazard from spinning blade

Hazard Mitigation

1. Mitigation of Eye Hazard:
   • If you are nearby the Shapeoko and it is in use, always wear protective eyegear.
2. Mitigation of Skin Hazard:
   • Be aware that the Shapeoko may spray splinters in a close proximity to itself.
   • Do not get too close to the material being cut when it is in use.
3. Mitigation of Bodily Damage from spinning blade.
   • Do not touch the spinning blade when it is in use. It is spinning at upwards of 1500 rpm, and can do a lot of damage to the body.
4. Failure to follow hazard mitigation rules by laser operators or spectators could result in temporary or permanent suspension of laser cutter privileges.

Waste Disposal

All scraps from cuts and all cutting residue must be cleaned from the Shapeoko and thrown into the trash after every use.

Procedures

All operating personnel must have read and understood this standard operating procedure (SOP) and all applicable references stated in this SOP. Signatures of all authorized operators are required at the end of this SOP.

1. Check the machine (all bolts and set screws tight, belts tight and in good shape, wiring in good condition with continuity and securely fastened, and nothing frayed or broken, everything clear and safe). The bolted down, inverted belts which result when using the belt anchor clips make this somewhat difficult --- use a mirror to examine the belts while moving the machine along its full range of movement.
2. Secure the work piece (right-side up and in the desired orientation) to the work surface using a technique appropriate to the material (see Workholding). If operating the machine as a 3D printer ensure that the print bed is level, clean and clear of any debris, foreign objects, or previous prints.
3. Mount an appropriate spindle and ensure that it is vertical and square to the machine and well-secured.
4. Examine the End mill to ensure that it is sharp and in good condition and not chipped (this is best done with a loupe or magnifying glass), install it per the spindle manufacturer's directions, check to make certain that the collet is tight and will not work loose during operation (it needs to be more than hand-tight --- the machine will take no notice or care if it works loose). If making a 3D print ensure filament is loaded and that the spool feeds freely and there is adequate tension to not be overwhelmed by retraction.
5. Ensure the work area is clear and all cables and wires run without interference. Especially check that there is nothing beneath the rails which might interfere with the wheels.
6. If necessary, home the tool to the proper place in relation to the work piece. (In the absence of limit switches, machine origin will be the location when Grbl powers up.)

(optional) Traverse the working boundary of the job as a final check.

1. Browse for the NC file which you have already simulated and send it to the machine.
2. Monitor the machine while it operates, ensuring there is no build-up of dust, debris or fumes, and that nothing works loose, keeping clear of the work area. Once the job is complete, turn off the spindle, return the gantry to the home position, or a known offset from home (one may want to wait to turn off the spindle until it's been homed) and ensure the end mill has stopped spinning before removing the finished piece and any waste. Store end mills carefully when not in use so as to protect the edges. Collets and accessories should be cleaned between uses --- wiped off with a suitable solvent such as isopropyl alcohol.

Shapeoko Clean-up Checklist

Before you leave the lab:

1. Remove all materials from the milling bed and clean off all cutting residue.
2. Ensure that the Shapeoko is powered off.

Training

Individuals who use this equipment are required to attend a Shapeoko Training session, where they will be trained to understand the safe operating requirements and intrinsic hazards of the Shapeoko.

Contact [1] to set up a training session for the use of the Shapeoko.

Emergency Response

If something goes wrong with the machine, turn off the Shapeoko and notify the persons responsible for the system as listed above. Do not try to fix it yourself.

In the event of a fire or any other emergency, evacuate and notify the fire department by dialing 911.

References

Operating Documents