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tools:metal_mill:clearance

Manual Mill (JET) Clearance

Members who are already proficient in the subject matter may apply to receive a clearance by demonstrating a core set of skills and knowledge that allow them to safely and effectively use the equipment.

Most tools in the shop require clearance before solo use. Each tool is different and most are expensive and/or delicate.

During a Proficiency Based Clearance Instructors will provide Protohaven specific customs and rules for the equipment but will not provide technical instruction on the operation of the hardware, or software.

If a member needs to gain additional knowledge or skill they should take a Basic Skills Class to learn the required skills.

The items that will need to be demonstrated to gain the Proficiency Based Clearance are:

General Shop Rules

Be safe

  • Understands safety clearances are required as bare minimum.
  • Understands equipment must never be left unattended.
  • Understands why equipment must be reset after use.

Take care of the tools

  • Will not alter or use equipment beyond limits.
  • Will notify when maintenance is needed.

Keep the shop clean

  • Understands importance of cleaning up after oneself.
  • Will return borrowed tools to original location.
  • Understands anything left outside of your paid monthly or overnight storage may be removed and disposed.

Personal Protective Equipment

  • Knows whether synthetic materials may be worn during use.
  • Knows whether long sleeves can be worn beyond elbows during operation of equipment.
  • Knows whether loose clothing & hair may be worn down.
  • Knows whether open-toed shoes may be worn.
  • Knows whether safety glasses and hearing protection are required during operation.
  • Knows whether safety glasses are required when near someone else operating equipment in the workshop.
  • Knows whether additional PPE is required (e.g. apron, face shield…)

Tool Specific Instruction

Point out the following tool features

  • Maintenance Tag
  • Basic Milling principals:
    • Climb vs conventional milling.
    • Work vs work-holding
    • Spindle RPM vs Feed SFM
    • Relative cutting rate of steel (slow) vs aluminum (fast).
    • Tram
    • Measuring Equipment (calipers, micrometers, scales or rulers, dial indicators, edge finder.
  • Basic Machine Components and Controls:
    • On/off
    • Spindle Brake
    • Speed control
    • FWD/Rev
    • Collet draw bolt
    • DRO
    • Bed
    • High/ Low Gear
    • Oil Pump
    • Deburring
  • X Motion Controls:
    • Manual wheel
    • Axis Lock
    • Ways
    • Power feed
  • Y Motion Controls:
    • Ways
    • Manual Wheel
    • Axis Lock
  • Z Motion Controls:
    • Z-Axis Cranks
    • Axis Lock

Identify & mitigate common hazards

  • Metalworking when done properly is much quieter than woodworking.
  • Knows the common causes of noise and which hazards they indicate (vibration, deflection, dull tooling).
  • Heavy things – tooling, work holding equipment & workpieces.
  • Sharp things - cutting tools, chips, burrs on work piece.
  • Spinning things – spindle, axis wheels.
  • Hot things - chips, work piece, tools.
  • Toxic Fumes - avoid prohibited metals.
  • Hot flying debris - use appropriate tools, work holding, and clear work area.
  • Fire/Gas Leak - stay vigilant (listen/smell test), use ignition button correctly.

Allowable Materials

  • Can name one common material that is safe for use on the mill.
  • Can name one material that is not allowed on the mill.

Safe Setup/Operation/Cleanup

  • Demonstrates proper work-holding with vise, clamps.
  • Demonstrates proper feed and speed selection.
  • Demonstrates proper cutting tool selection.
  • Demonstrates proper mounting of cutting tool in collet.
  • Demonstrates facing, drilling, profile cutting.
  • Demonstrates edge finding.

Knowledge and Technique

  • Knows and demonstrates proper PPE.
  • Demonstrates how to properly use the power feed.
  • Demonstrates proper protocol in the event that the machine breaks.
  • Demonstrated proper cleanup.
  • Demonstrates what to check on if the Mill is making a lot of noise.
  • Demonstrates how to change settings to ensure best quality cuts.
  • Demonstrates how to properly use the gear speed lever and the speed control.
  • Knows the most notable aspect of the edge finder.
  • Knows what a boring bar is used for.
tools/metal_mill/clearance.txt · Last modified: 2024/02/07 18:32 by smartin015