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Electronics Recycling June 15th at FHS

Don’t Throw it Out!

On Saturday June 15th, recycle your old electronics and support us. We are holding our 4th Electronics Recycling Event at Framingham High School (115 A Street, Framingham) from 9 am to 3 pm . For a small tax-deductible donation, we will make sure your old electronics are disposed of properly.
The fees per item are:
$1 for each cell phone (and other small portable devices);
$5 for each inkjet printer, VCR, scanner and toaster oven;
$10 for computers, laptops, microwaves, laser printers, dehumidifies and all flat screen monitors;
$15 for TVs with screens measuring less than 24” diagonally (including all flat screens);
$25 for TVs measuring 24” and above, and window air conditioners;
$30 for projection, wooden  and console TVs, all white goods, such as washers, dryers, refrigerators and stoves.
Charges for larger items are based on size.
All items will be recycled and hard drives are sanitized/erased or destroyed by A & P Enterprises of Berkley MA.

How to keep an axle from flexing

From: Jason Brett:

So with axle flex you’re usually dealing with some form of three-point beam bending. The deflection of the shaft is — as you’ve pointed out — affected by both length and thickness. The thickness comes into play as the “moment of inertia” of the beam… for a square shaft the formula is proportional to the fourth power of thickness. Doubling the thickness will result in a 2^4 increase in resistance to bending, and therefore deflection should be reduced by a factor of 16.

Length, however is a cubic factor. Reducing the unsupported length (from bearing to bearing) by a factor of two will result in an 8 fold reduction in deflection. It might actually be a bit higher than that because these formulas assume a point load and a uniform beam… your beam is thicker where the wheels are and the load is distributed across that width. But the general concept applies…. shorter is better, and cubic factors make a huge difference! Simply reducing your unsupported span from 7″ down to 5″ will give you (5/7)^3 of your current deflection… about 36%. Reduce it to 4″ and you’ll be down to 18%.

Do BOTH… reducing your unsupported shaft length to 4″ AND doubling the shaft thickness and you’ll be at 1-2% of your current deflection… assuming, of course that load remains constant. If you aren’t able to compress either the tread on the wheels, the balls, or move the support on the other side of the balls, then you’re still going to have the same amount of deflection… because something has to give somewhere! This brings up the third factor in deflection… the load. Perhaps a little less “squeeze” will be sufficient to reduce your shaft flex. Keep in mind, however, that load is only linearly proportional to deflection… you’d have to reduce the load by 50% to cut deflection in half.

UNO’s Fundraiser on December 13th!

Visit UNO Pizzeria & Grill in Framingham for lunch, dinner or take-out and support FHS Robotics!

On December 13, just bring this flyer and up to 20% of your check will be donated to them!

Catering, take out and lounge purchases included. Call ahead for parties of 6 or more, 508-620-1816. Uno’s deliver locally for orders over $100.

Visit www.unos.com to view their menu.

 

[gview file=”https://www.fhs-robotics.com/wp-content/uploads/2017/12/Unos-Robotics-Fundraiser.pdf”]

Clean out your closets and help FHS Robotics June 17th

As you already know, for a small fee, the FHS Robotics Club will take anything with a cord and recycle it. But starting this year, we will also take your gently used clothing and other household items for free!

We are teaming up with Savers and they will make a contribution to FHS Robotics for every pound of clothing we deliver to them. We’ll accept gently used clothing, shoes, bedding, towels, hats, mittens, scarves, ties, socks, purses, wallets, backpacks, bags, belts, jewelry.

On Saturday June 17th from 9 am – 3 pm we will in the main parking accepting both electronics and clothing. But you can save a trip and drop off items Wednesday June 12th through Friday June 16th from 11 am-3 pm.  Please bring clothing in a standard 13 gallon kitchen trash bag.

The fees for dropping off electronics are:

$1 Portable Items – Cell phones,MP3 players, telephones smoke detectors, calculators, routers, modems, speakers less than 12” tall, or USB hubs

$3  Small Items – External hard drives, external CD/DVD drives, or speakers 12-15” tall

$5 Medium-sized Items – Inkjet printers, VCRs, scanners, DVD Players, radios, stereo components, boom boxes, toaster ovens,  game console, or speakers 15-22” tall

$10 Medium-Large Items – Laptops, fax machines, laser printers, or speakers 22-34” tall

$15 Larger items – Computers, microwaves, humidifiers, dehumidifiers, all-in-one printers

$20 Large Items – All computer monitors or TVs 27” diagonal and under and speakers over 34” tall,

$25 Very Large Items – TVs over 27” diagonal, air conditioner (home wall/window units)

$35 Wood console/ projection TVs

Ridiculously Large Items – Office copiers, large AC units, refrigerators, washers, dryers, etc.  are priced by size (H+W+D) in inches:

Size < 70” – $15
70”-80” – $25
80”-90” – $35
90”-100” – $45
100”-110” – $55
110”-120” – $65
120”-130” –$75

Things we take:

  • Plastic TVs, Wood TVs, Laptops, computer monitors, computers, CPU boxes, all computer parts and accessories, keyboards, mice, cell phones, speakers, video games and systems, camera/video/audio equipment, fax/copy machines, printers, wires, plugs, drives, cards, servers.
  • Household Appliances, including all white goods including refrigerators, freezers, water heaters stoves, dishwashers, washers and dryers. Household appliances including toasters, irons, hair dryers, and microwaves.
  • Metal Items (less than 8 ft long)
  • Metal poles, metal desks, barbeque grills (no propane tanks), pots

Things we won’t/can’t take:

  • Automobile parts  (Tires, mufflers, fenders, etc.)
  • Beds & bedding parts (Hide-a-beds, bunk beds, mattresses, box springs, waterbeds, coil springs, etc.)
  • Construction materials (Lumber, pipes, floors, tubs, cabinets, carpet, doors, windows, etc.)
  • Damaged furniture (Torn, soiled or in need of repair)
  • Flammable products (Any items that operate on or contain fuel including: gas cans, propane cylinders, lawn mowers, weed trimmers, camp stoves, tiki torches, etc. )
  • Hazardous materials (Batteries, paints, chemicals, cleaning products, poisons, any liquids, etc.)
  • Infant products (Car seats, cribs and related products)
    Marine vessels (Boats, canoes, kayaks, etc.)
  • Weapons (Firearms, explosives, ammunition, flares, etc.)
  • Other items (Swing sets, food, animals)

 

We made a cone!

We made an In the Zone cone in our Formlabs printer. The printer bed is the perfect size, but with the support materials we needed to print it at 96% of actual size. But at least it gives a good idea of the structure.

The link to the file is at the bottom.

Inside the printer

 

22 hours later, DONE!!!

40 grams of support material removed

Finally, a cone!

Click here is the file for the cone.