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Al's Automata Blog

An Automata Oops!

2/4/2015

0 Comments

 
When making automata there is sometimes need for careful thinking. For me, gluing together a large camshaft always requires focus, and I often wait until I'm mentally set before starting. The combination of getting things in the right place, in the right orientation, and at right angles to the shaft while working with CA adhesive is sometimes adventurous. Even though I thought I had preplanned carefully when doing this camshaft, I found on assembly that I had reversed the position of two cams on each side and that the head movements expected were not as planned. Here's a photo.

Picture
The second and third cams from the left are reversed as well as the sixth and seventh. This is where a good $#@&* is usually warranted. Here is the new one.
Picture
So how did I do it? One choice is to chuck it in the garbage and start anew. Another is to try and recover the gears, since they require more work to make, and scrap the cams.
Lastly you can try to save all the pieces, sacrificing only the shaft. I chose the last one. Here's how it goes.

Cut the shaft, in this case 3/8" diameter, out from between the cams/gears leaving a little protruding out on each side (1/16"). Drill thru the dowel using a drill 1/16" smaller diameter that the shaft size. (Make sure when drilling you have the cam flat. I placed it over a 1/2" hole that received the short stub on the other side.) Here's what a cam should like after doing this.
Picture
Now using a utility knife, moving around the circle, carefully push the tip down into the remaining dowel splitting it slightly several times. Repeat on the other side
Picture
Next using a flat object, like the blade of a small slotted screwdriver, push the dowel remains inward until they break. Do both sides. You really only need to get one side completely clear so you can re-drill the original original hole. I do both sides and remove as much dowel material as I can just to ensure better drilling accuracy. Sand the backside of the cam/gear flat so it lies flat for drilling. Using a forsner bit carefully drill out any remaining dowel bits and glue. Now you can assemble the cams/gears on a new shaft.
Picture
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  • Home
  • Automata Blog
  • Automata Gallery
    • The Balsam Lake Elevator Co. >
      • A Tour of the Hoist Room
      • The Key BLEC Employees
    • DJ's Bee Bop Palooza >
      • Roles of Bees in a Hive
      • The Bee Bop Characters
    • Swimming With The Dolphins
    • Tubing The River Styx
    • A Boat, A Boy, And A Dog
    • Parking Lot Wars
    • The Invisible Audiophile
    • Black Bear Bliss
    • The Chase
    • Baa Baa Bad Sheep! >
      • Baa Baa Bad Sheep Photo Gallery
    • The Penguins' Revenge
    • Cirque de Poulet
    • I'm Thinking & Laura
    • The Bipolar Brain
    • Tempest in a Teacup
    • Inner Demon
    • Sewer Rat Symphony >
      • Musican Profiles
    • The Captive
    • Bored Out of My Skin
    • Waiting at the Clinic
    • The Diagnosis
    • Snowbirds
    • The Not So Early Bird - The Common Sleptin
    • 1 HP Heart Pump
    • The Trojan Cat
    • 7-1/2 Horsepower
    • Howdy!
    • The Bus Stop
    • Rhinoceros Racing
    • It's an Uphill Battle
    • When an MRI Goes Badly
    • A Moment of Silence
    • Who Slew the Chicken?
    • The Dentist's Office
    • Owl Hijinx
    • Horse of a Different Colour >
      • Horse of a Different Colour Features & Specs
      • Horse of a Different Colour Photo Gallery
    • March of the Penguins
    • The Extraction >
      • The Extraction Media Gallery
    • Poultry in Motion
    • School's Out!
    • Pond Life >
      • Pond Life Photo Gallery
    • Rat Co. >
      • Rat Co. Employee Profiles
      • Rat Co. Photo Gallery
    • Happy Birthday Daddy! >
      • Happy Features & Specs
      • Happy Birthday Photo Gallery
    • The Raving Fans
    • The Waiting Room >
      • Waiting Room Photo Gallery
    • Cottage Cabernet
    • Neighbourhood Watch
    • Check Please!
    • Fishing >
      • Fishing Photo Gallery
      • The Mechanism
      • Brutus the Catfish
      • Crawford the Crayfish
      • Bigmouth the Largemouth Bass
      • Buddy the Chocolate Lab
      • Gertrude and Heathcliff
    • Ian's African Lion Safari
    • Call Before You Dig >
      • Features & Specs
    • Crossing The Mara >
      • Features & Specs
    • Migrating Caribou >
      • Features & Specs
    • Rocket Pack Raccoon
    • Urban Terrorists >
      • Exploring the Urban Terrorists
      • Features & Specs
    • Top Gun
    • Miss Communication
    • Hula Hoop Girl
    • Java Jane
    • The Cranky Caterpillar
    • A Case in Point...
    • The Leafs Score!
    • Enough With The Fish!
  • Learning Centre
  • Automata Store
  • Workshop Tour!
    • Sanding
    • Drilling
    • Cutting
    • Measurement
    • Carving Tools
    • Hand Tools
    • Working With Brass
    • Work & Assembly Areas
  • Mechanisms, Tip & Tricks
    • The Why and How Of It!
  • Who Am I?
    • Making Automata
  • Contact Me
  • In The News
  • Links
  • The South Bay Railway
    • Murray's Mill
    • Rivers, Creeks & Ponds
    • Early Days Photo Gallery
    • Layout Photo Gallery
    • Layout
  • Totems
  • Some Other Small Projects
    • Misc Projects
  • Driving Home for Christmas
    • Designing the Float
    • A Penguin Prototype
    • The Human Flock
    • The Float Penguins
    • The Float Video
  • Members Page