Tag Archives: Enclosed Hardware

High resolution 3D printed replacement parts

The First Layer: Turntable Pt. 1, Modeling for Threads

An old record turntable in need of some loveRecently a friend sent this lovely turntable across my desk looking for a bit of TLC. Yes, it is a little worse for wear, but except a couple missing parts it all still works. One of those missing parts is an adjustable foot for leveling the table, while the three remaining feet had all been damaged and were beginning to fall apart; look closely at the foot that’s removed in the above photo and you can find an epoxy seam where it was repaired once before. Below you can see my final part with steel bolt for threading next to the fully 3D printed prototype:

High resolution 3D printed replacement parts

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3D printed shift knob

The First Layer: 3D Printed Shift Knob Wood Finishing Technique

 

In part 2 of 2 from the 3D printed shift knob project, I’ll go over the basics of how to achieve this kind of beautiful wood-like finish effect and a simple way to get inlaid lettering. I have tried this process with a few brands of wood type filaments, and so far I have found Hatchbox’s variation to be quite reliable and to accept the stain very evenly. I’ve found that with most fill-type materials, changing the nozzle out from the standard 0.4mm up to a 0.5 or 0.6mm diameter helps reliability considerably. You can see below how rough the part is coming straight off the printer, but this was done intentionally to serve part of the finishing process.

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3D Printed Shift Knob for Mini Cooper

The First Layer: 3D Printed Shift Knob with Encapsulated Hardware

Hello readers and MAKEiT owners,  and welcome to to the first installment of The First Layer, MAKEiT’s blog section devoted to advanced printing and design-for-print techniques. From the desk of our design director Russell Singer, The First Layer will be your new source for tips and techniques to take your 3D printing ability further.

In today’s post I’m revisiting a project I completed a few weeks back: creating a realistic wood finish for the manual transmission shift knob of my Mini Cooper. Because the shift knob is a regular point of tactile interaction it was important to achieve not only a high quality finish that would appear as wood, but also a comfortable form with enjoyable tactile feedback and functional usability. In this first post I’ll focus on the CAD considerations and the printing process, follow along on the second post for the full finishing technique to achieve the beautiful effect shown below.

3D Printed Shift Knob for Mini Cooper

Aside from preferences on shift knob weight and profile, the only real functional consideration is getting a snug secure fit on the shifter shaft. After one attempt with a simpler friction-fit design, I found the hot daytime temperatures in Southern California would cause enough size distortion to loosen the knob even though it might be very stuck in place in cooler temperatures. I revised the design to work with set screws and some hex nuts that are enclosed into the print, as shown below:

cutawayView

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