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Main Boards => The Bowyer's Bench => Topic started by: heartlandbowyer on January 23, 2013, 08:42:00 PM

Title: Poor Man Lam Grinder
Post by: heartlandbowyer on January 23, 2013, 08:42:00 PM
Found what I needed on the job site in the dumpster.  :D  Well except the sander!
(http://i1336.photobucket.com/albums/o641/cengert74/100_2342_zpse2baf3a1.jpg)
(http://i1336.photobucket.com/albums/o641/cengert74/100_2343_zpsfdf694f5.jpg)
(http://i1336.photobucket.com/albums/o641/cengert74/100_2345_zps6d40f0eb.jpg)
Title: Re: Poor Man Lam Grinder
Post by: JkChenault on January 23, 2013, 08:59:00 PM
Very nice
Title: Re: Poor Man Lam Grinder
Post by: D on January 23, 2013, 11:01:00 PM
I've got the same sander and have been thinking about making a lam grinding jig.  It looks good.  Is the spring board just to prevent kick back??
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 23, 2013, 11:07:00 PM
D,
Yes and it also keeps the lam agaist the fence so I can keep the skin on my fingers.
Title: Re: Poor Man Lam Grinder
Post by: rmorris on January 24, 2013, 12:11:00 AM
I was using that at one point but never showed it because it had no guard and I managed to get a finger caught and took the top of my pointer finger off in a split second... Scary stuff but I will have to admit it worked good and for a very reasonable price.

I would only try this if you are willing to take the time to build a guard so fingers can't get caught since your fingers are the auto feed function.
Title: Re: Poor Man Lam Grinder
Post by: goobersan on January 24, 2013, 05:26:00 PM
Great job! I have the same sander and will definitely build a similar contraption. for now I still have 10 fingertips   :bigsmyl:
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 24, 2013, 08:26:00 PM
Ralph,
I put the oak board on there to keep my string pullers out of the way, but after your mishap I'm going to build some kind of cage. I will definately post a pic of the cage. I want everyone who builds bows to be able to shoot them.

Cory
Title: Re: Poor Man Lam Grinder
Post by: rmorris on January 24, 2013, 09:14:00 PM
Cory , it did jack up my good shooting hand and it had me out of shooting for over a month. Looking at the 3rd picture if ya were to put that on the other side as tall as the sander I think it would be safer. I was able to get cocobolo veneers as thin as .025" with 60 grit as long as I kept a steady feed rate.

I would also imagine any kick back would explode a veneer with your kick back stop behind the feed opposed to putting the kickback stop in front of the feed and also stop it from pulling a finger into the feed.
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 24, 2013, 09:32:00 PM
Ralph,

The set-up does a good enough job that I think I can make a box with only enough room for the lam and lam sled to slid through, then there will be no danger on either side. Thanks for the advise.    :thumbsup:
Title: Re: Poor Man Lam Grinder
Post by: bowkill32 on January 25, 2013, 12:41:00 AM
build one of them D i would like to see it in action...
Title: Re: Poor Man Lam Grinder
Post by: MoeM on January 25, 2013, 08:41:00 AM
I don`t know about professional thicknesssanders but with my shopmade one I`ve never noticed any kickback- no matter how deep I ran a workpiece into at one time.
A cage would be easy to install on this grinder I think- just put it to the upper frame.
All I would worry about is the squareness- isn`t it affected by setting the belt on right track?
Title: Re: Poor Man Lam Grinder
Post by: So-Mo Archer on January 25, 2013, 10:20:00 PM
I am digging that design! I have been thinking about making a lam grinder, but didn't have a good idea of how. Thanks Cory!  :clapper:
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 25, 2013, 11:27:00 PM
Moe,

The belt tracking is adjusted by the smaller roller. I do have a small shim under the base to square up to the front roller. It's off about .001 to .002 so i just flip the lam and run it through the other way then I'm good to go.

I'm also planning on attaching the cage to the oak board on the fence.
Title: Re: Poor Man Lam Grinder
Post by: timberstix on January 26, 2013, 12:09:00 PM
Hi

New boy here. Just started bowmaking and have been watching the laminate grinding devices with great interest. I just need a trip to the nearest scrap yard!
Title: Re: Poor Man Lam Grinder
Post by: BenBow on January 27, 2013, 06:47:00 PM
Just picked up one of the ridgid sanders and I'll be copying your idea soon. Thanks
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 27, 2013, 07:51:00 PM
Got the cage put on, nothing fancy but it will keep me from taking some skin off. Both sides look the same, just made the gaps wide enough to fit sled and lam.
(http://i1336.photobucket.com/albums/o641/cengert74/100_2362_zps6c30bf68.jpg)
Title: Re: Poor Man Lam Grinder
Post by: BenBow on January 27, 2013, 08:16:00 PM
What part of NE are you from?
Title: Re: Poor Man Lam Grinder
Post by: rmorris on January 27, 2013, 08:20:00 PM
Now this is some good information to pass around! Good job!
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 27, 2013, 08:28:00 PM
Galen,
Live in Exeter it about 45 min west and south of lincoln.

Thanks Ralph, I feel better now since it'll be safe for whoever make this jig, thanks for your insight.

Cory
Title: Re: Poor Man Lam Grinder
Post by: BenBow on January 27, 2013, 10:13:00 PM
Cory I lived in Louisville for a while. Lots of deer around there.
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 27, 2013, 10:44:00 PM
Galen, the deer got hit hard with EHD this year, the game and parks had around 6500 reported so I'll bet it was at least 5 times that high. I found dead deer everywhere I hunted this year. The mature does got hit the hardest where I hunt hopefully there were still enough running around for good breeding.
Title: Re: Poor Man Lam Grinder
Post by: BenBow on January 28, 2013, 09:28:00 AM
Cory my new sander seems to have a lot of vibration does yours?
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 28, 2013, 02:35:00 PM
Galen, try taking the belt off and see if the vibration goes away, mine doesn't vibrate to bad. Did you rubber pads come off the bottom of the sander?
Title: Re: Poor Man Lam Grinder
Post by: BenBow on January 28, 2013, 02:59:00 PM
Cory it has the pads and I've had it 2 days now. But yesterday it appeared to be running pretty smooth then the nut that holds the sander on the shaft flew off. I put it back on and tightened it by hand and it kept coming loose. It ran pretty smooth when the nut was loose but when it was tight it shook quite a bit. Think I'll take it back and see what they say.
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on January 28, 2013, 06:56:00 PM
Galen, yep I'd definitely take it back, sound like maybe something in the belt carrier or motor went outta wack. Its brand new I wouldn't think you'd have any problem exchanging it. Its a pretty good sander, out trad club has three of them and we abuse the heck out of them at our annual selfbow build

Good luck,
Cory
Title: Re: Poor Man Lam Grinder
Post by: monterey on February 04, 2014, 08:02:00 PM
Cory, have a brand new Ridgid sitting in the garage waiting to be made into a lam grinder.  Also waiting for temps to get at least above 25deg  :eek:  

A question I have is about the feather board.  Am I seeing that it is spring loaded??
Title: Re: Poor Man Lam Grinder
Post by: Sam Harper on February 04, 2014, 09:23:00 PM
That's actually fancier than how Bob Sarrels used to do it.
Title: Re: Poor Man Lam Grinder
Post by: heartlandbowyer on February 04, 2014, 09:33:00 PM
Mike, yeah it's spring loaded helps keep a little pressure on the lam as I slide it in. More than anything it keeps my fingers out of the danger zone. It doesn't do to bad of a job either, I've already ground more than enough lams to pay for the sander.
I'm sure it doesn't work near as good as a nice drum sander but it will do until I make that investment.

It takes a few lams to get er figured out but after that it's easy sailing. Even push pull feed is the most important thing for decent lams. I also use a sled for all of my lams, parallel included. Just take your time and you will have good lams and glue lines.

Cory
Title: Re: Poor Man Lam Grinder
Post by: BenBow on February 05, 2014, 08:45:00 AM
I posted this before but here's what I ended up with on my Ridgid.
I picked up this Ridgid sander & made an adjustable fence for it. Works great. I put a dial indicator on it which is pretty accurate for adjusting the thickness. Made the base out of mdf with a layer of aluminum glued to the top. Did a little shimming to get things squared up so it does a pretty good job.
I added additional mounting holes to accommodate larger pieces.

      (http://i.imgur.com/f38nxRr.jpg)
      (http://i.imgur.com/KhVuvfM.jpg)
      (http://i.imgur.com/ZyZfzuq.jpg)
Title: Re: Poor Man Lam Grinder
Post by: LittleBen on February 05, 2014, 09:09:00 AM
My setup is a little different, it's a small horizontal drum (3"x3") instead of the edge sander, but I also find it suprisingly useful.

The things I find that make the biggest differences are a slow steady feed rate, running the lam through multiple times at a given setting (4-6 runs at final setting to reach precise thickness) and the quality of the sled and feed ramp(or fence). If you use a perfectly true sled and fence, you will get perfectly true lams.
Title: Re: Poor Man Lam Grinder
Post by: Buemaker on February 05, 2014, 10:33:00 AM
This is what I have, no motorized feedsystem though.
 (http://img.photobucket.com/albums/v145/buemaker/Lam1.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam1.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam2.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam2.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam3.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam3.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam4.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam4.jpg.html)
Title: Re: Poor Man Lam Grinder
Post by: Buemaker on February 05, 2014, 10:35:00 AM
 (http://img.photobucket.com/albums/v145/buemaker/Lam5.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam5.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam6.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam6.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam7.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam7.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam8.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam8.jpg.html)
Title: Re: Poor Man Lam Grinder
Post by: Buemaker on February 05, 2014, 10:36:00 AM
 (http://img.photobucket.com/albums/v145/buemaker/Lam9.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam9.jpg.html)
 (http://img.photobucket.com/albums/v145/buemaker/Lam10.jpg) (http://smg.photobucket.com/user/buemaker/media/Lam10.jpg.html)
Title: Re: Poor Man Lam Grinder
Post by: Roy from Pa on February 05, 2014, 11:54:00 AM
I guess it's ok, Bue:)
Title: Re: Poor Man Lam Grinder
Post by: BenBow on February 05, 2014, 02:52:00 PM
Nice setup Bue
Title: Re: Poor Man Lam Grinder
Post by: BenBow on February 05, 2014, 03:01:00 PM
I built this one that I use also. The ridgid just takes wood off faster.
  Saw powered sander  (http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=125;t=003078)
Title: Re: Poor Man Lam Grinder
Post by: beachbowhunter on February 05, 2014, 03:29:00 PM
You guys are a bunch of freaking inventors! Impressive work guys.  I took the easy route an got a store-bought drum sander    :D