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Difference between revisions of "Dial Indicator"

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Revision as of 13:39, 10 December 2018

Dial Indicator

Project developed by User:Devon Smith
Status
This OSAT has been designed but not yet tested - use at own risk.
This OSAT has been prototyped.

You can help Appropedia by contributing to the next step in this OSAT's status.

Abstract

  1. A dial indicator is a tool used to measure linear displacements. It accomplishes so via the use of a plunger that's constricted to a measured linear movement. Simply, when the plunger is pushed into the body of the tool, the distance it is pushed in is "indicated" on the "dial" face of the tool. This is useful for any kind of precise measurement of thickness, depth, width, and can even be used to ensure a machining device or tool is accurately trammed.
  1. Picture of completed print using your printer

Bill of Materials

Part Quantity Source Comments
PLA ~87 grams Filament supplier of choice Color of choice
Dial Indicator Body 1 Youmagine Using PLA
Dial Indicator Top 1 Youmagine Using PLA
Spacer 2 Youmagine Using PLA
Dial Indicator Needle 1 Youmagine Using PLA
Gear 1-2 1 Youmagine Using PLA
Gear 3-4 1 Youmagine Using PLA
Gear 5-6 1 Youmagine Using PLA
Dial Indicator Plunger 1 Youmagine Using PLA
Gear 7 1 Youmagine Using PLA
6-32 Button Head Cap Screw 1 inch long 3
6-32 Button Head Cap Screw 1.25 inch long 1
6-32 Nylock Nut 4

Tools needed for fabrication of the OSAT

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. XX Hex Head Allen Wrench
  3. XX Open End Box Wrench

TOOL REQUIREMENTS MAY VARY BASED ON NUT & BOLT SELECTION

Skills and Knowledge Necessary to Make the OSAT

  • 3D Printing Knowledge & Capabilities
  • Understand the needs & application for a dial indicator
  • Ability to assemble fasteners and critically aligned plastic components

Technical Specifications and Assembly Instructions

  1. Download and print the plastic components listed in the bill of materials
  • Recommended: Print with a 100% infill at 0.25mm layer thickness or less, print speed may vary depending on printer
  1. Clean burrs and excess plastic from parts that may be remaining from print
  2. Align the corresponding components from the bill of materials to the pictures posted below while ensuring:
    1. All holes align
    2. All gears mesh together
    3. L
  3. Assemble Fasteners so that the head of the screws are on the face of the indicator and washers are on both mating surfaces
  4. Lightly tighten fasteners so that gears spin freely with minimal slop
  5. Assemble needle so that needle is spaced away from dial face

Common Problems and Solutions

Cost savings

  • xxg of PLA ($0.40 USD) + nut ($ USD) + bolt ($ USD) = $ USD Total
  • current one on the market: link and price
  • Cost savings of $ USD (% cost savings)
  • The biggest benefit is not cost, but availability when Amazon delivery is not an option in a remote or devastated area.

Benefited Internet Communities

Name and add links to at least 5 using single brackets around [url name]:

References

  • Gear Design
  • Thingiverse of dial indicator
  • Thingiverse of rack/pinion