How Can I Create a Custom Switching System for a Remote Control Car?

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Discussion Overview

The discussion revolves around creating a custom switching system for a remote control car, focusing on the materials and methods for cutting and shaping plastic components. Participants explore various techniques and tools suitable for home fabrication of parts.

Discussion Character

  • Technical explanation
  • Exploratory

Main Points Raised

  • One participant inquires about the availability of kits for cutting plastic at home versus needing a specialist.
  • Another participant suggests that the thickness of the plastic determines the cutting method, recommending scissors for thin plastic and a scribe tool for thicker materials.
  • A participant shares a resource that emphasizes the importance of plastic thickness in the cutting process.
  • It is mentioned that hobbyists often use a soldering iron with a cutting edge for precision cuts, and a Dremel for rough cuts.
  • Industrial methods are noted, where a heated wire is used to cut plastic, described as effective and smooth.
  • Alternative methods such as casting, thermoforming, fiberglass modeling, and stamping are proposed for creating parts, each with specific instructions on how to execute them.
  • Some plastics can be directly carved or cut using standard tools like X-Acto knives and rotary tools.

Areas of Agreement / Disagreement

Participants present a variety of methods and tools for cutting plastic, with no consensus on a single best approach. Multiple competing views on techniques and materials remain evident throughout the discussion.

Contextual Notes

Participants express varying assumptions about the thickness of plastic and the tools available, which may affect the applicability of the proposed methods. No specific limitations or unresolved steps are noted.

Who May Find This Useful

Hobbyists, DIY enthusiasts, and individuals interested in model building or custom fabrication may find this discussion relevant.

linux kid
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Need a custom switching system for a model

Let's say you were building a small toy that such as a remote control car. I need parts cut from plastic. Is there a kit to do this at home or would I need to go to a specialist?
 
Last edited:
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How thick is the plastic?

If thin like 1/16", just use scissors. If a little thicker like 1/4", use a scribe tool like you can get at Tap Plastic, and break over a sharp straight-edge table.

Thicker than that -- I usually pay Tap Plastic to cut those pieces for me.
 
Most hobbiest do this with a cutting edge attached to a soldering iron. Rough cuts can be done with a Dremel. I've been known to use a straight pin held in pliers and held over the gas flame from my stove.
 
Industrial applications use a bit more complex version of what Danger mentioned. They use a wire that has a current running through it to heat it. It acts like a coping saw. Cuts like buttah.
 
The other options are to try casting,
thermoforming, or fiberglass modeling, or stamping
some of the parts.

If you can cast them from liquid rubber/plastic, just make
a mold from clay or such and pour away then trim when
cured.

If you thermoform, just make a mold out of something like
clay, plaster, sand & glue, or whatever, take the
appropriate semi-thin sheet of thermoformable plastic,
drape it over the mold, heat gently (e.g. hair dryer,
heat gun, or very carefully controlled time in the oven on
low heat), and apply gentle pressure to form the pliable
soft warm/hot plastic over the shape you're trying to
mold it to fit. Cool and trim.

Fiberglass modeling is like paper mache, just get your
resin and some small pieces of matrix (fiber glass cloth,
cheese cloth, gauze, newspaper, whatever is appropriate),
dip/paint them with a thin coat of the resin, let dry.

Stamping, just like using cookie cutters to make
shaped cookies. Make the outline of a stamp shaped
like the part you want in something like sharp sheet
metal from a tin can, or carve the outline with a dremel
tool, sharpen the edges, and press it hard against a
relatively soft / thin plastic sheet to make as many
copies of that cutout shape as you need. Works well
with stuff like soft vinyl, thin HDPE (plastic milk jug), styrofoam, rubber, teflon, etc.

Some kinds of plastic like delrin, teflon, HDPE,
paraffin wax, etc. you can just directly carve and file
and cut with tools like x-acto knife, dremel / rotary tool,
files, etc.
 
Nice post, Xez. :cool:
 

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