I needed something to precisely measure height of irregular objects so I've created this jig. It works with any standard (16 mm width, ≥150 mm length) caliper and can measure objects up to 90 mm high (extendable with longer legs).
The top plate is thick enough to resist bending during measurement. Legs are lightly press-fitted so that the entire thing can be easily disassembled for storage. The caliper is held well enough by friction but an additional magnet can be used to ensure the caliper won't tip out of position.
Usage:
- Assemble the jig.
- Insert caliper into position.
- Lower caliper's depth rod to the base plate. Be sure to only lightly touch the plate, not push against it.
- Zero the caliper.
- You can now measure height of the objects you want. Read directly from the caliper's display, no math necessary.
Assembly:
- Use M3 screws to mount the caliper holder. M3x8 is recommended, but x6 and x10 should work as well. In absence of screws glue can be used, just be sure to align the depth rod hole.
- [optionally] Insert a ⌀8 mm neodymium magnet to better hold the caliper. The magnet can have any height.
Printing:
- At least 200x200 mm build plate is required.
- Print 4x legs and everything else once. No supports necessary.
- If you care about the magnet holder use Arachne or similar engine capable of generating thin perimeters.
- Legs might need to be rescaled slightly for proper fit depending on your printer.
- Legs can be scaled in Z if you need to measure higher objects.
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