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#76 2015-07-17 17:02:38

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

wink  Code name Spike: substitute a dog's paw holding the LED'd spheres.

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#77 2015-07-21 17:58:10

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

Thus far, I am thinking...

Mold:
PlatSil® 71-10 Silicone Rubber from Polytek

Casting material:
PT Flex 60 Casting Rubber from Polytek (0.0026* in/in shrinkage upon cure). I may regret this and wish I had gone for the Flex 40, but we'll see.

While Release is not necessary, it's good insurance so I may go with some.

Colors... well, we'll see. wink

Master:
I couldn't find an economical way to print up bbraun's model, so I have decided to scratchbuild one myself from styrene. I have some accurate pieces thus far. It should be very accurate, although v1 of my model is not going to include the swoop. v2 may, as I am pretty sure I could pull it off, but don't want to get ahead of myself. I'm missing one tool that will make this go a lot faster, so rather than hacking out a model, I'm going to be patient and pick it up soon. Should see more progress in a few weeks. But these feets have been like, what, 20 years worth of waiting? so months more won't be that big of a deal smile

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#78 2015-07-26 19:56:00

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

I worked up the styrene master today. This is v1... styrene is nice because it's cheap; I will invariably have to build more masters. This one isn't an exact repro, but it's pretty close. It fits well- not perfectly, but styrene feets could conceivably work on their own. There's enough flex to get them off and on the box.  Probably won't get to molding/casting until next weekend at the earliest.

Last edited by MJ313 (2020-05-30 20:31:00)

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#79 2015-07-27 00:44:53

macdrone
Member
From: Rainier, Or
Registered: 2014-05-25
Posts: 246

Re: Those Q700 feets

Nice work, keep the updates coming!!!

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#80 2015-07-27 01:29:01

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

Looks great, excellent craftsmanship. By swoop, I assume you mean fillet? smile

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#81 2015-07-27 14:40:43

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

Yes! Exactly that! I saw you call it that before, but didn't realize that was the exact term for it. But that's it. In the picture of the model attached to the case, it looks like the space that would be filled by the fillet is substantial, but the model's only an inch tall, so the actual returns are negligible. But... I do like a challenge and it's certainly prettier with it. 

EDIT. And it probably serves a practical purpose as well...  tongue

"Stress concentration is a problem of load-bearing mechanical parts which is reduced by employing fillets on points and lines of expected high stress. The fillets distribute the stress over a broader area and effectively make the parts more durable and capable of bearing larger loads."

Last edited by MJ313 (2015-07-27 15:13:45)

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#82 2015-07-27 16:30:10

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

wink  Mine lack the fillet, but paint buildup and relative size of the assembly make for a less noticeable gap.

miniquadrafeetsmacsfini.jpg

MiniQuadraFeetsMac™

Keep in mind that I made mine out of 3/4" MDF scrap from the Apple Display Unit in order to keep the cooling vents clear of the carpet. That was long before existence of the stock feets came to light over yonder. I'm in for a set of yours just because. smile

Last edited by jt (2015-07-27 17:07:50)

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#83 2015-07-27 16:57:24

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Those Q700 feets

Any idea what the radius is of that turn?  Getting it wrong when making the feet out of a hard unforgiving material would be a bummer, although a bit of sanding should help.

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#84 2015-07-27 17:07:26

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Those Q700 feets

:-)  looks good.


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#85 2015-07-27 17:58:34

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

bbraun wrote:

Any idea what the radius is of that turn?

Digital caliper reading variance is 2.13-2.85mm using the inside corner attachment from the combination kit for the try square, that's using ID & OD sides of the calipers. Eyeballing it with the right angle "square on average" roll ) sliding marker/pocket clip of the 6" General Tool Stainless Rule almost invariably "looks like" a 1/8" radius. Same thing with the 6" Try Square.

Given variances in the squareness of the case/length of the mating surfaces of the various measuring devices, I'm inclined to go with that Mk1 Eyeball/1/8"radius figure for a first estimate. That's the outside corner of the Q700 case. The longer the square's mating surface with the case, the worse the measurement error.

Let's see what mcd comes up with measuring the inside corner of the feetsfillet.

I'll check the router box for a 1/8 Roundover Bit, If I find one, maybe I'll run my incredibly FUGLY IIcx case across it on the makeshift router table.

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#86 2015-07-27 18:33:23

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

For the styrene model, my plan is to just take a very thin strip of styrene cut to the same width of the foot, align and tack the edge to the bottom of the quarter-pipe run, put the foot in place on the case with some glue between the quarter pipe and the right angle (where they are in contact). Let it dry and it should fit perfectly. Trim off excess at the top. Then fill-in the fill-et with some... ehh.. fill-er. smile

oeebp0lfaku5uvqesk14.jpg

Last edited by MJ313 (2015-07-27 18:34:56)

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#87 2015-07-27 18:46:08

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

And for the record, I haven't forgotten about the AppleRainbowFeets or BlueDalmationFeets. I don't know if you guys were really serious, but on styrene, those patterns are certainly do-able with the airbrush.  I might knock them out when I get some time.  For all intents and purposes, the styrene feets do work on their own, they are just a little more time consuming to make then the rubber gizmos will be. Presumably. I hope. tongue

Polytek gave me a mysterious 33% discount + free shipping on my order. Absolutely no clue why, but that's fun.

Last edited by MJ313 (2015-07-27 20:10:50)

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#88 2015-07-28 01:18:53

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

Fillet making. smile

Gotta dry before I polish it up.

Last edited by MJ313 (2020-05-30 20:31:16)

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#89 2015-07-28 01:47:29

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

Sweet curves.

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#90 2015-07-28 01:48:00

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Those Q700 feets

Fillet of Foot?

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#91 2015-07-28 23:45:33

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Those Q700 feets

Ok, just for you jt, since you gave me the measurements on the curve:
q700foot-fillet.png
IMG_0174.JPG
IMG_0172.JPG

And the source file: q700foot.scad

Now I'm done.  I promise.  smile

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#92 2015-07-29 01:14:05

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

Oh no, no, don't be done!

btw, if we were playing beer pong, I'd be drinking... lol

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#93 2015-07-29 02:52:38

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

If I had a beer, I'd hoist it to the both of you! Great work. smile

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#94 2015-07-29 03:22:45

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Those Q700 feets

Ok, ok, I couldn't help myself.  Same design, but this time, a PROTOTYPE (printed in clear resin):
IMG_0175.JPG
IMG_0176.JPG

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#95 2015-07-29 08:28:51

cc333
Member
From: North S.F. Bay Area, CA
Registered: 2014-05-23
Posts: 600

Re: Those Q700 feets

That actually looks quite good!

Are they soft and pliable, or are they rigid and hard?

c


Main Macs: Early '09 Mac Pro, Mid '12 MacBook Pro 13"
Secondary Macs: Early '08 Mac Pro, Mid '12 MacBook Pro 15"
Playthings: Mac SE/30, 3.0 GHz Mavericks-based HackServe, Many others....
Desired: Lisa, Kanga PowerBook G3, Apple IIc, Apple II, Spare parts, etc.

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#96 2015-07-29 08:34:41

uniserver
Member
From: Sf, Mi
Registered: 2014-05-15
Posts: 956
Website

Re: Those Q700 feets

i like those clear feets!
drooling_homer_785344_answer_4_xlarge.gif


#I Re-Cap √Mac √NeTX √Amiga Boards - A/B - PSU# (MacCaps.com)  Modern SCSI HD's - For Old Macs - Pre Cfg'd - 10k RPM! 73gb!! $50 + free shipping  -- Mac 128K Re-Ram kits (16 Chips) $35 + shipping, Floppy Issues?-> Bourns Filter Solution 128k - SE/30, $16 + shipping

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#97 2015-07-29 14:48:40

ScutBoy
Member
Registered: 2014-05-25
Posts: 159

Re: Those Q700 feets

A Q700 fell into my lap about a week ago, so when these are ready for production, I'm in for a set.

They look great, and kudos to the "team" that's put this all together!

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#98 2015-07-29 15:12:02

bbraun
Member
Registered: 2014-05-29
Posts: 1,064
Website

Re: Those Q700 feets

The material is probably the least attractive part of the deal.  They are hard and kind of brittle.  I broke one just trying to get it off the build platform.  Being a hard material, they also want to sit on an absolutely flat and level surface (alternatively, the bottom of the feet could be sanded to match whatever).  That's why I mentioned before about a rubber pad or something on the bottom.  I think generally they're more for appearances than an actual practical foot.  I think MJ's will turn out to be far more practical than these ones.

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#99 2015-07-29 15:56:57

MJ313
Member
Registered: 2014-09-23
Posts: 498

Re: Those Q700 feets

I think it's great that people have options... if people want to go top-shelf, they can use bbraun's scad file and go crazy. Or if they want the cheapie knockoff version they can go with mine. smile

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#100 2015-07-29 15:59:09

jt
Member
From: Bermuda Triangle, NC USA
Registered: 2014-05-21
Posts: 1,470

Re: Those Q700 feets

I think I'm in love! I've just gotta figure out an LED hack for those frosty clear feets! My only stock Quadra 700 has migrated to the AppleDisplayUnit(c) and the ugly IIcx now occupies its MaxiFeets platform/high heels.

Swapping out the Quadra 700, Q700/7100/G3, Q700/8500/G4 and IIcx at will for quad-platform playtime with multi-FeetsSet styling options = way cool! big_smile

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