CanHaptics Lab 1: No-tech puppeteering

Raw materials gathered for DIY Sketching

(Special shoutout to Hannah for being a fun and helpful (virtual) labmate!)

Goal

Resource Gathering

Brainstorming

Crackers and Tea (1mm)

Materials Used

The Idea

On the bottom side of the mechanism, I wanted to use the impact force to roll something. When you are rolling an object, the transferred force is reduced and the more distance it moves, the lesser impact it creates while hitting another object. I used a glue stick as the rolling object. Initially, the rolling mechanism (when the spool impacted the glue stick) was not very controlled, so I added a transfer layer of a wooden spoon placed on top of a book. The spool hits the spoon, and then the spoon slides the glue stick. At this stage, I added a heavy object towards the end that would barely move (~1mm) when the glue stick impacts it. The cracker box came in handy. I adjusted the weight removing some crackers.

As a twist, I took a plastic box, added some pebbles inside it, hung my tea strainer, and put it on the top of the spool. So, when the spool is released the tea strainer comes down with it and goes right into my teacup, ready with the hot water! A random clothing tag was used to create air resistance and do some speed control when the spool and plastic box slide down the string.

Reflection

Lever and Pulley (10mm)

Correction: *string from the fork was passed through a hole in the cup, not over its rim (see video)

Materials Used

The Idea

When I was lifting an object, it was following a slight curve trajectory and it was hard for me to measure it using a scale. So, I created a sliding rail mechanism using a metal straw polled on top of a take out container. The take out container was filled with pebbles for stability. I luckily found a small 3D printed bit in my compass box that quite fits on the metal straw and slides smoothly (fun fact: it is the first object I got 3D printed, back in 2015, when it was expensive and slow; hence the size).

On the side of the fork, where you apply force, I attached a string and passed it through a hole in the plastic cup, creating a pulley. Now, instead of applying vertical force, I can apply horizontal force. To make this mechanism more stable and restrain the cup from toppling over, I filled the cup with water. I also attached a weight to the other side so that the end bit can go back to the normal position when the applied force was released. And here we go!

Reflection

SlideO (100mm)

Materials Used

The Idea

Reflection