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Quick, Cheap Thickness Sander for ShopSmith or Lathe #3: Finishing up the build

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Blog entry by shipwright posted 12-02-2011 03:15 AM 4782 reads 9 times favorited 24 comments Add to Favorites Watch
« Part 2: Structurally Complete - down to details Part 3 of Quick, Cheap Thickness Sander for ShopSmith or Lathe series Part 4: Tuning Up »

When I left off yesterday I needed elevators and the skirts for the dust collector. I decided to go with two elevators for the ability to micro adjust for very thin cuts leveling marquetry. If you don’t need that sort of accuracy then a single elevator in the center would be easier and quicker to adjust. In my application getting one side even a 64th of an inch thinner than the other could be problematic so I want to give myself every chance. I am willing to spend a little more time adjusting. Once adjusted I am planning to add sheets of paper under the work piece to advance the cut.

Here are the elevators I designed. They are just a piece of reddi rod with a cap nut on one end and a wing nut on the other. They will be installed in the base with a pair of insert nuts. I decided against the locktite in favor of a jam nut after the photo was taken.

Here they are installed. They are set just far enough in to clear the inside of the front edge of the bed when at it’s highest travel.

This is the bottom of the bed showing the installation of the locking rod and the torsion box grid structure.

The pvc pipe fittings were rough cut to shape and inserted through the 4” half section then sanded flush after gluing.

These are the dust collection skirts. They are angled at the bottom to sit just above the workpiece during operation. The tops are rebated to accept and locate the dust collector pipe section.

This is the feed side view , all set up. I think I like the idea of the SS powerhead helping to support the DC hose so this is the orientation that I will be using.

Last bits are painted and she’s all set for the application of the velcro and sandpaper. That is due to arrive tomorrow. Then I can do a few little tweaks and see just how accurate it is.

All done for now. If anyone wants to see a rough sketchup that I did of this a few days ago it is here: http://sketchup.google.com/3dwarehouse/details?mid=fcb2e5343e7f2c454fddb9809ec3f669

I re-design as I go so it doesn’t look exactly like what I actually built but the concept is there.

Thanks for dropping in.

Questions, comments, critiques are always welcome.

Paul

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/



24 comments so far

View Druid's profile

Druid

670 posts in 1519 days


#1 posted 12-02-2011 03:25 AM

Looks good. Can’t wait to see the results. Thanks for the step-by-step of your progress.

-- John, British Columbia, Canada

View HalDougherty's profile

HalDougherty

1820 posts in 1960 days


#2 posted 12-02-2011 03:51 AM

Paul,

It’s looking great. I went to HD today and picked up the few things I need to build one too. HD had 3” PVC and it felt stiffer than the ABS pipe.

-- Hal, Tennessee http://www.first285.com

View PurpLev's profile

PurpLev

8476 posts in 2372 days


#3 posted 12-02-2011 03:59 AM

looks great. how does it perform?

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View Shopsmithtom's profile

Shopsmithtom

780 posts in 2918 days


#4 posted 12-02-2011 04:05 AM

This looks great. I must get back to digest this when I have more time.

-- Accuracy is not in your power tool, it's in you

View grizzman's profile

grizzman

7151 posts in 2027 days


#5 posted 12-02-2011 04:46 AM

the only thing im not clear on paul is how do you adjust the elevator so that its the sake on both sides..if you have to do each one separably, isnt there room for micro errors and this a difference in thickness, and it sounds like it is critical in marquetry…can you help me out so i understand it better…grizz

-- GRIZZMAN ...[''''']

View shipwright's profile

shipwright

5230 posts in 1521 days


#6 posted 12-02-2011 05:27 AM

Grizz, there is an opportunity in any setup to be a little off from one side to the other. With two elevators and the locks I think I have a better chance to adjust it out. The eye is very good at spotting off parallel especially when one end is in contact and the other not. It will be harder to adjust but I think it will be worth it…........................ But at this point, it’s all theory.

I may put a third one in the center. Then I could use it alone or the two when I needed to.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View Dez's profile

Dez

1121 posts in 2800 days


#7 posted 12-02-2011 05:28 AM

Very well done!

-- Folly ever comes cloaked in opportunity!

View patron's profile

patron

13146 posts in 2064 days


#8 posted 12-02-2011 05:36 AM

very well done paul

looks real pro

just a question though

whats a shopsmith ? lol

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Lee A. Jesberger's profile

Lee A. Jesberger

6686 posts in 2703 days


#9 posted 12-02-2011 06:14 AM

Paul,

Great looking work.

It’s a pleasure to see you in action.

Lee

-- by Lee A. Jesberger http://www.prowoodworkingtips.com http://www.ezee-feed.com

View bunkie's profile

bunkie

411 posts in 1870 days


#10 posted 12-02-2011 06:28 AM

Patron,

To borrow an idea from Douglas Adams, the ShopSmith is the woodworking equivalent of the number 42.

;-)

-- Altruism is, ultimately, self-serving

View lightweightladylefty's profile

lightweightladylefty

2710 posts in 2436 days


#11 posted 12-02-2011 07:39 AM

Paul,

Can’t wait to hear how it works! Great ingenuity!

L/W

-- Jesus is the ONLY reason for ANY season.

View Gene Howe's profile

Gene Howe

5933 posts in 2152 days


#12 posted 12-02-2011 01:46 PM

Grizz, there is an opportunity in any setup to be a little off from one side to the other. With two elevators and the locks I think I have a better chance to adjust it out. The eye is very good at spotting off parallel especially when one end is in contact and the other not. It will be harder to adjust but I think it will be worth it……..................... But at this point, it’s all theory.

I may put a third one in the center. Then I could use it alone or the two when I needed to.

Sprockets and chain! Then they both move together.

-- Gene 'The true soldier fights not because he hates what is in front of him, but because he loves what is behind him.' G. K. Chesterton

View SPalm's profile

SPalm

4904 posts in 2605 days


#13 posted 12-02-2011 03:06 PM

Dang you do nice work Paul. Love the paint too.

As far as adjustment on one side not being parallel to the other, you could make a sled. Lock the bed in place. If you sand the sled with a sheet of say 1/8” or 1/4” hardboard double sticky taped under it, it will be parallel to the drum. Now remove the hardboard, and add a backstop. You can then use the backstop to hold a workpiece. Shim the workpiece up as you go. The sled also gives you something to hold onto with small pieces.

But then again, maybe it will be easy to adjust. Just a thought.
Steve

-- -- I'm no rocket surgeon

View Les Hastings's profile

Les Hastings

1281 posts in 2496 days


#14 posted 12-02-2011 03:38 PM

Great idea, looks like it was store bought. Market it!

-- Les, Wichita, Ks. (I'd rather be covered in saw dust!)

View shipwright's profile

shipwright

5230 posts in 1521 days


#15 posted 12-02-2011 05:00 PM

Gene, I understand what you are saying, but the whole idea of the two independant elevators is to allowfine adjustment on one side without moving the other.

Steve, The piece of half inch mdf that’s there in the photos is the sled, or maybe the sled goes on top of it. I’ll be deciding based on slipperiness. There are lots of scenarios for getting really fine accuracy. I’m just trying to give myself the most flexibility.

Bottom line : I don’t think it will be very hard to adjust at all.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

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