What did you do today?

[brian Rupnow]

I went to the beach today. Wife, three adult kids, and 3 grandchildren and we had great fun. Wife and daughter and oldest son set under a beach umbrella and yacked. Poppa (that's me) and three grandkids and our middle son played in the water all afternoon. I kept building sand castles for Jake, the three year old and he kept running over them with a toy bulldozer. Half way thru the afternoon the lifeguards all got on their bull horns and ordered everyone out of the water. Somebody was missing. My middle son got in the search line and they walked down the swimming area in the water looking for a body. Fortunately the missing body had sneaked away to the public washrooms and forgotten to tell anyone she was going. Okay--Back into the water, all was well. Nobody drowned, nobody even got a sunburn. Had a great day!!!---Brian

[skunkworks]

Some light machining...

http://bbs.homeshopmachinist.net/threads/76679-Small-mill-project-(SMP)

[Joel]

I don't think it is an issue Matt, and the last thing I would want is to discourage you from posting. Was just agreeing with Paul that separate threads have some advantages.

Maybe I should use more smileys?

[wombat2go]

Are you saying that only some (one?) of the splines see a load at any given time, depending on the orientation of the hub with respect to the chain?

I think the cassette teeth each see a cyclic load on their drive faces which peaks at a fixed angle, such angle will be where the chain pull is approximately in quadrature.

For the engineering mechanics static 2D planar case, when the wheel is locked and the rider is standing on a pedal,
the cassette is statically determinate I think, and if infinitely stiff, and not a press fit,
there will be only contact with the chain at one point and point contact with 2 teeth on the hub.
This should be OK at any bicycle speed where dynamics can be neglected.

Sum_of_F = 0 for all free bodies and Timoshenko and Young "Engineering Mechanics" Page 17 says so.
Also the Theory of Varignon can be used to solve this I recall.

Before HP and TI came along we would have to solve this stuff with a slide rule and graph paper!

These days the 2D FEM apps can do it from a dxf file
and also consider the Young's modulus to give the tooth stress and strain.

( which I try to do before making any critical stuff for bike/trike in the home shop)

[J Tiers]

Almost zero machine content today.... Mucked out the pond. it was about half full of general goo, and stuff the 'coons knock in when they are after fish. Did find that there were at least double the number of fish in there that I thought there were.

Only marginal machine content was that I had to fix the pump, and change around the piping to work better. I had to at least enter the shop and use some tools.

[Stepside]

Spent a large portion of the afternoon with a set of street clock works. It seems that in certain conditions you can wind them backwards. Since the works are close to 100 years old the supply of parts is non-existent. I am waiting to discuss the conditions leading to the failure with the guilty party.

[reggie_obe]

Spend the day at the closing day of the NJ State Fair in Sussex county. Met some new state Ag. people, talked with some county Ag. people I knew, saw many prize winning examples of horses, cows, sheep, etc. Enjoyed seeing the antique tractor and hit n' miss engine displays.

[PStechPaul]

For quite some time I have been watching Craig's List for kitchen cabinets to replace what I now have (which were salvaged from a friend's basement apartment when it was flooded). Now the sink base cabinet has deteriorated due to a leak, and needs to be removed and replaced, and while doing that, I need to work on the plumbing to keep it from freezing, and also add an outside hose bib. Every time I found something suitable on CL, it was either far away or sold before I could snag it. But someone in an adjoining neighborhood was doing kitchen remodeling and had cabinets to get rid of:



I got them loaded in my truck (took two trips), and got them home:



Looking more closely, it seems that these cabinets will notwork for my kitchen, so I made a 3-D model of what I might be able to do with new cabinets from Lowes:



Everything as shown is about $1067. They are unfinished oak:

https://www.lowes.com/pd/Project-Source-36-in-W-x-30-in-H-x-12-in-D-Unfinished-Door-Wall-Cabinet/50134954

https://www.lowes.com/pd/VT-Dimensions-Formica-8-ft-Elemental-Stone-Straight-Laminate-Kitchen-Countertop/1000437821

https://www.lowes.com/pd/Project-Source-36-in-W-x-35-in-H-x-23-75-in-D-Unfinished-Square-Lazy-Susan-Corner-Base-Cabinet/50134968

I think I will visit Lowes and have a better look, especially at the corner base cabinet shown above. I'm not sure of the dimensions and it might not fit where I need it because of some plumbing in that corner (partially shown in my model).

[3 Phase Lightbulb]

Went to the Def Leppard and Journey concert at Fenway park this weekend. The turf seating up near the stage was a complete disaster, but other than that it was an absolutely amazing concert.

[Cenedd]

Massively depressing day today. My son (6 yo) is on school holidays so I took him and my mum (complaining she's not seen him enough since recuperating from her knee replacement) to Knebworth House. Loads for him to do - adventure playground, dinosaur trail, maze etc. Then the tour round the house itself. Have to give him credit for the fact that he was really well behaved through the bit I thought he'd lose interest in and get bored. This is the depressing part. I'm 41 and my mum is 76. On two separate occasions, two different staff in the house commented that it was nice for him to be out with grandma......and grandpa! :O Do me a favour! I mean, she'd have to be doing pretty well on the toy-boy front to pull off that sort of age gap! *shudder* Think I need a holiday!

[skunkworks]

My hair turned white in my 20's.. I am currently 45 with 2 kids (3 and 5). More times then not I get called 'grandpa'..

[Cenedd]

3Phase: My teeth look 3-400 years old....but it's all my own fault. I try not to smile at people too often

Skunkworks: Ah, well you have twice the children to age you prematurely. I swear I was young-looking before I had mine! I'll be following your SMP thread - the level of machinery is beyond what I have available but it's interesting to see what could be done.

[vpt]

This has been my every day. Getting close now, just a couple more little pipes and it can leave finally.

[vpt]

Warped one of the V-band flanges when welding it on. This was an interesting one to dial in and the flange has two surfaces. Got to use the new dro!



The job was turn, stop, adjust boring head .020" out, turn, stop, adjust, repeat. Didn't come out to pretty but its strait and will seal up. I cleaned it up some more with files and sand paper after I pulled it out of the mill.

[CCWKen]

Wow! You're quite the plumber.