Sunday, February 7, 2016

2016-02-06 (Sa) ESPeri.Impass

Magnets were glued to the latest spinner. Unlike all previously printed models there was no holder for the magnets, this time they were simply glued at approximately the center of the bottom of the spinner. There didn't seem to be any upset in the balance although it was not a final design choice. Markers were added to identify one of the spinner face, red sticker, and a white arrow was placed on the lid to indicate which direction the protrusion on the lid faced.

The clearance between the lid and the spinner was difficult to gauge since it was not visible under the thick cap.  A USA quarter was placed under the base and that elevated it well but it wasn't steady. The next base will need longer legs. Another observation was that the spinner did not have much ability to wobble so the grommet should be repositioned higher in the next print.

Another base option would be to surround the spinner with a large neoprene ring and raise it or lower it to change the amount of variability. A base could be designed which would allow the surrounding neoprene ring to change height while in operation.



To do:
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-02-04 (Th)

Saturday, February 6, 2016

2016-02-05 (F) Weekly Summary

Printing spinners as one piece was nice but it did require a certain orientation and they were probably larger than necessary. To make a spinner smaller it was broken into identical halves. Each half had grooves where a grommet or washer could be mounted then sealed inside when the spinner was glued together. The grommet was meant to dampen the impact between the spinner and the post so wobbling, in any direction, would not be felt.

Half spinners

After the first print the model was shortened but the grommet holders remained. Until a good location was found it was easiest to have multiple places to mount the grommet. By bringing the grommet closer to the pivot point the spinner could wobble in a wider arc than placing it lower which would tighten the arc.

Grommet installed in shortened spinner

Trapping the grommet inside two glued pieces worked very well but when it was placed on a post it didn’t spin well. The model was broken up again to print in three pieces. By making the pivot point a separate print the finish was smooth and unbroken so there were no grooves or pits to snag the post.

Three part spinner model

Instead of gluing two halves together the three-part spinner needed a second phase of glue. First, the two grommet holding halves were sanded and glued together with a grommet inside. Next, the top of the glued parts were sanded as well as the bottom of the cap. Then the cap and bottom parts were finally glued.

Three part model assembled

When a workable spinner proved it could spin freely and the impacts could barely be felt it was modified to include an extension on one side of the top. This extension, like a baseball cap brim, was meant to collide with a protrusion on the lid. Since the protrusion and extension would only impact when the compass faced north the rest of the collisions would be against a soft grommet and not significant.

Three part model with tapper

A base, to hold the post, and a lid, with a protrusion, were modeled to fit inside a small clear plastic jar. The post was a long aluminum rivet which had been cut down and sharpened. The jar was a simple paint jar from a hobby store.

Spinning model for base and lid

All the parts fit together, although some of them had to be sanded or drilled in order to fit properly. These measurements were due to printer and filament inconsistencies. Once they were tweaked they were inserted into a jar. They all fit well.

Compass in a jar


The rest of the weekly summaries have been arranged by date.

First time here?

Completed projects from year 1
Completed projects from year 2


 

Disclaimer for http://24hourengineer.blogspot.com/

This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

Friday, February 5, 2016

2016-02-04 (Th) ESPeri.Impass

A list of changes to the model was made after yesterday's performance. Most of the changes were minor. The grooves for the neoprene grommet or washers which weren't being used were removed and the cavity of the spinner was opened up. The spinner was also shortened a little to increase the clearance from the base.

Spinner with groves gone and shortened

Since the base needed so much work done after it was printed the model itself was altered so it would require less work. A printError variable was added so that some dimensions could be tweaked on account of slop in the printer. If people wanted to copy this file but their printers had higher tolerances the printError variable could be reduced or even set to zero. This affected the base diameter, which wouldn't fit in the jar, and the rivet hole, which needed to be drilled out before the rivet would fit.

To do:
  • Update spinner
    • Shorten spinner
    • Remove unnecessary ribs
  • Update base
    • Add printerError factor
    • Widen post hole according to printerError
    • Widen base
    • Widen screw hole according to printerError
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-02-01 (M)

Thursday, February 4, 2016

2016-02-03 (W) ESPeri.Impass

Two pieces were modeled to go inside a plastic jar and act as the supporting pieces for the compass spinner. The bottom piece was meant to hold an aluminum rivet straight up inside the jar which didn’t have a flat bottom. The top piece was meant to be screwed into the jar’s lid where it would hold the spinner down and keep a protrusion in place for the spinner to tap against.

Spinning model of jar inserts

When the jar inserts were printed the base would not fit inside jar as planned. In order to reduce the diameter of the base a cordless drill was used to rub the base on sandpaper. Reducing the diameter this way produced a smooth and uniform edge without having to reprint.

Using a drill to sand the sides of the base

The pieces were all set together to show off how they were intended to fit together. The aluminum rivet was trimmed so it would fit the height of the jar before being inserted in the base. The hole in the printed base had to be drilled out in order to closely match the rivet.

Spinner, base and lid

All the pieces were assembled. Naturally, issues were expected and found. The uneven bottom of the jar wasn’t accounted for so the little legs on the edge of the base were lengthened. The rest of the problems were saved for another revision.

Assembled in jar

To do:
  • Update spinner
    • Shorten spinner
    • Remove unnecessary rib
  • Update base
    • Add printerError factor
    • Widen post hole according to printerError
    • Widen base
    • Widen screw hole according to printerError
  • Design enclosure based on old enclosure
    • Use a larger hole in the bottom for the rivet
    • Add protrusion to lid
    • Design to fit inside jar
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-02-01 (M)

Wednesday, February 3, 2016

2016-02-02 (Tu) ESPeri.Impass

A small addition was made to the top of the spinner. An extension was added to the top so a small ledge stuck out like a baseball cap. This ledge is intended to strike a protrusion on the top of the enclosure although an enclosure hasn’t been modeled yet.

New spinner on right with jar in background

Some of the earlier models relied on plastic jars as the enclosure. It is now simple to print a jar but it would not be clear and it would be more expensive than simply purchasing a commercial jar. More importantly, a commercially produced jar could be waterproof which may become a factor as this project goes into later stages. Filling the compass with liquid would dampen some of the erratic movements which could result in false collisions that would fool the user.

Spinner inside small jar


To do:
  • Design enclosure based on old enclosure
    • Use a larger hole in the bottom for the rivet
    • Add short wall
    • Wall can completely surround
    • Add protrusion to lid
    • Design to fit inside jar
  • Add protrusion from spinner to intersect lid
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-02-01 (M)

Tuesday, February 2, 2016

2016-02-01 (M) ESPeri.Impass

The previous model file was not altered in shape. Instead the way the pieces were split up was changed. Rather than simply cutting the model in half the column was split into two pieces like before but the top was absent from those halves. Then the top was modeled separately and upside-down so the pieces could all be printed as they were rendered.

Spinning model

The pieces all printed well but they had rough edges so they were sanded flat. The cone shape in the top portion looked like smooth concentric rings, due to printer layers, which was important for easy spinning. When the grommet was installed the sides compressed it slightly so the hole in grommet was not a uniform circle.

Printed spinner parts after sanding

All three parts of the spinner were glued together and given several hours to dry. Ordinary super glue was used but modeling glue could also have been used. Spinning performance was good and the collisions were greatly muffled. The next steps will be taken for making this spinner type haptic.

Assembled spinner with grommet installed

To do:
  • Remodel into a 3 piece design
    • Post cone receiver
    • Grommet adapter, side 1
    • Grommet adapter, side 2
  • Design enclosure based on old enclosure
    • Use a larger hole in the bottom for the rivet
    • Add short wall
    • Wall can completely surround
    • Add protrusion to lid
  • Add protrusion from spinner to intersect lid
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-01-30 (Sa)

Monday, February 1, 2016

2016-01-31 (Su) ESPeri.Impass

Both printed spinners were leveled with a piece of 150grit abrasive paper held by a standard clipboard. A clipboard was used to ensure the paper would be stationary and flat. Flat faces on the pieces would help them to fit together flush. Two pictures were taken, one was taken before the pieces were sanded and a second picture was taken parallel to the tops to show how they had been flattened.


Pieces before sanding

Pieces after sanding

The older model was also sanded. A neoprene grommet was inserted in the new model and a neoprene washer was inserted in the old model. There shouldn't be any issue with performance between the washer and the grommet but any differences should become apparent. Each of the halves were taped together with ordinary masking tape.

Old model in background and new model in foreground

Narrated video was taken to show the differences between the two newest spinners and one of the old styles which was printed as a single piece. It was apparent how well the old spinner would spin compared to the new models but the plastic-on-metal collisions were unacceptable. It should be possible to redesign the model so it can be printed to optimize for spinning while still using the grommets or washers to reduce unwanted collisions.



To do:
  • Remodel into a 3 piece design
    • Post cone receiver
    • Grommet adapter, side 1
    • Grommet adapter, side 2
  • Make handheld haptic compass
  • Make compass work from pocket or necklace
  • Miniaturize
The rest of the posts for this project have been arranged by date.

First time here?

Completed projects from year 1.
Completed projects from year 2



This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.

All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.

All digital communication regarding the email address 24hourengineer@gmail.com becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.

Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.

This blog, including pictures and text, is copyright to Brian McEvoy.

2016-01-30 (Sa)