Mr Stabby

A reciprocating Hysteria Machine

Boris van Galvin

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Description
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Components 6
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Logs 2
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Description

For many years man has been obsessed with the creation of devices for pleasure. Back in the early and mid 18th century the female state was referred to as Hysteria and in a way was thought to be somewhat of a mental disorder. Devices were designed and built and a special doctor was employed to assist in the relief of this condition.

I get to build and repair all manner of devices as well as come up with my own spin on some of the more modern ideas, a recent one was a reciprocating saw with an upgraded speed controller and a few other alterations. The end result is somewhat "Earth Shattering"

I was approached by a client to build a larger reciprocating machine, after looking around I found that many of the units suffer from the inability to compensate if they are jammed with either the motors blowing or the mechanical components bending.

So i started work on what I have nicknamed Mr Stabby given that the action would make any serial killer envious.

Details

The first part of the project was to look at what kind of motor to use, having built a few CNC machines in the past I opted to use a Stepper Motor as this would allow me to change speed and direction quickly as well as create a programmed step arrangement..

The concept was to make something that could be programmed allowing the user to set how long they would like the stoke to be and the possibility of altering the stroke length on the fly.

By hitting the program button the user can extend and retract the shaft by hand and save up to 40 moves that will repeat over and over when played back.

Components

1 × Arduino Nano - May upgrade to a Mini 3.2
1 × Nema 23 Stepper Motor
1 × pololu wheel encoder
1 × Single TB6600 0.2 - 5A Two Phase Hybrid Stepper Motor Driver
1 × Stainless Steel Hex Shaft

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Project Logs

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Shaft Drive
Boris van Galvin • 12/16/2015 at 03:23 • 0 comments

The shaft is made from stainless steel hex rod and is pinched between the stepper drive wheel and two guide wheels, the pinch wheel has a rubber sleeve to allow it to grip the shaft. The stepper is also on a pivot and a tension spring puts enough force to allow it to move however it it jamms it will either skip steps or slip on the shaft.
LCD and Speed.
Boris van Galvin • 12/15/2015 at 21:56 • 0 comments

Finally the LDC, Speed Controller and Distance Sensor are all working together! I have added a new mode called Random, still needs some fine tuning but the shaft will move outwards a random distance, I was tempted to also add a random speed and velocity into the mix but may leave that for another time.