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Author Topic: Crusarius’ sawmill build - started with Linn Lumber basic kit  (Read 7229 times)

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Offline Magicman

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #160 on: November 04, 2017, 09:31:27 am »
Remember that even Wood-Mizer is continually making changes/improvements.  Year model and Revision# becomes important when ordering replacement parts, drive belts, etc.  Thankfully that information is kept under your WM account number and is available when you call for stuff.

New models are sometime sold as "prototypes" at a reduced price but they can be a real challenge for the buyer later on as service/parts are needed.
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #161 on: November 04, 2017, 10:13:33 am »
yea. Like my jeep. I am pretty sure this will be in prototype stage forever :)
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #162 on: November 06, 2017, 08:27:20 am »
This weekend did not look like I did much. But I did full weld the bed. At least the parts that were ready to be welded. I started out in the shop trying to get it into a spot that would be easy to weld. Since I am so restricted on space I thought my death jack / hi lift would work the best. It was a great idea; till I realized it is only a 48” hi lift (the frame is over 50” wide). Needless to say it was still to heavy to move by hand. I added that piece of angle with a pair of c-clamps in case the jack slipped.



As the sign on the wall says this is the wrong way to do this. I really miss having a chainfall.


This is just a really kool shot of the welds and the view from my shop. You can also see my bucket forks that I used to flip the frame up so I could weld it.



I don’t normally do vanity shots of my welds but I was very happy with this one. I was doing a vertical weld from .188 wall to .095 wall.


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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #163 on: November 06, 2017, 08:28:34 am »
I scored a free torsion axle from a friend of mine. It came out of a 2 place horse trailer. I needed to cut 18” out of the center to make it the right width. Not thinking it was going to be a big deal I grabbed the sawzall and started cutting. After a whole lot of swearing and getting kicked all over the place I grabbed the grinder with a cutoff wheel. I finally got all the way through the axle to find out it was solid.
This is a picture after cutting the second cut in the band saw. You can see the torsion spring on the far end connected to the axle mount. It does have electric brakes so I can add those later if I choose to.



Mockup of the axle under the trailer.




Really bad picture but this is how tight it is in the garage now. I think I need to get this thing painted so it can go outside and give me some work space again.






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Offline ktm250rider

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #164 on: November 10, 2017, 07:26:04 am »
Do you have a length of the base legs (that ride on the track)?  I cut mine to 3 feet last night and they just seem short when laid next to the head. 

Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #165 on: November 10, 2017, 07:38:42 am »
I made mine 39" end to end that includes the wheel pockets which are 2"x3". I also offset the mast towards the back which makes the legs stick out more in the front and takes care of the uneven load.

Trying to remember but I think I have 10" to the back of the mast then 6" mast which leaves 23" legs off the front.
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #166 on: November 10, 2017, 09:03:36 pm »
Help me! I am having a design fart. I can't get my backstops figured out. I thought I had it all figured out but then I started thinking about needing to adjust them. Can anyone help me with pictures of the backstop and how they adjust? I am starting to go crazy trying to figure it out.

I am planning on rotating backstops.
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Offline Kbeitz

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #167 on: November 11, 2017, 04:49:08 am »
That's what I did... The clamp presses on a brass button to provide resistance
so it stays where I put it.

 

 
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #168 on: November 11, 2017, 08:33:34 am »
I don't see any adjustment on that. am I missing it or did you just make it fixed and decide to deal with it?

What is the angled bar behind your backstop? Do you raise each backstop 1 at a time?
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Offline Kbeitz

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #169 on: November 11, 2017, 09:02:41 am »
The backstops rotates. It you don't want it so high then you don't
rotate it up so far. The angled bar is my toe lift with a roller on it.

 

 
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #170 on: November 11, 2017, 10:52:48 am »
did you build any adjustment into it? I may be over thinking my design a bit. I am trying to make it adjust in 2 planes so I can keep it square through the full rotation.
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Offline Kbeitz

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #171 on: November 11, 2017, 11:53:21 am »
It keeps the log square at all angles. I'm happy with it and the only changes
that I have made to it was to cut it off the frame and made it so i could bolt
it on. This way if something gets bent I can unbolt it and fix it. Oh... And looking
back at my pictures I cut the point off the top. It's now much easier to keep it
square. In this picture you can see at one time I had teeth on the backstops.
I found that I did not need them so off they came. You will find that the only
time you really need the squareness of the backstop in the first time you rotate
your log. After that the bottom of the log sets flat on the bed of the saw. It
also helps when your using your saw for edging.

 

 
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #172 on: November 11, 2017, 08:24:55 pm »
I am so ready to give up on the fancy backstops. I made my prototype and it is nice and perpendicular straight up but as I rotate down it close to less than 90 degree angle. I wish I could get past this mental block I am having and figure this out. I know it is something very simple I just can't get to it.
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Offline Kbeitz

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #173 on: November 11, 2017, 10:49:05 pm »
I am so ready to give up on the fancy backstops. I made my prototype and it is nice and perpendicular straight up but as I rotate down it close to less than 90 degree angle. I wish I could get past this mental block I am having and figure this out. I know it is something very simple I just can't get to it.



The swivel end is not square to your bed frame. Put a square on the backstop and
unhook the other end off the frame and move it to your left facing the stop. Reattach
to your frame and you should be good to go.
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #174 on: November 12, 2017, 01:14:59 pm »
Well I think I might have finally got it. I ended up making it 2 way adjustable. May be a total pain to get them alighned but once done I think we will be good to go.

p.s. Do not put your finger there. It really hurts.
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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #175 on: November 12, 2017, 04:33:43 pm »
I thought making the back stops was easy. Now the front paws or clamps or
what ever you want to call them is a real pain in the neck... I'm still not happy
with mine... I use both screw type and cam type. i'm waiting for someone to
come up with a better idea.
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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #176 on: November 12, 2017, 06:02:14 pm »
Mine are spring type. So far the mockups I have done I really like. really seems to hold 2x's nicely :) My big issue is the have enough play they like to lift when I clamp twisting the board. With bigger cants that probably won't be a problem but as they get smaller it will be
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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #177 on: November 12, 2017, 06:25:12 pm »
I would like to see pictures of them sometime...
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #178 on: November 12, 2017, 06:29:52 pm »
yea. maybe :) I dunno I may not be able to figure out how to post them :)

I will probably post some from work on monday I can upload 2 million times faster there.
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Offline Crusarius

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Re: Crusarius’ sawmill build - started with Linn Lumber basic kit
« Reply #179 on: November 13, 2017, 01:00:40 pm »
So here we go. “The 3 week backstop story”. Sponsored in part by design funk, stopping productivity since 3 weeks ago.

So I have been fighting with how I want to do the backstops on the mill. I thought about vertical stops but was not wanting to have to raise and lower each one individually. I then thought of a way to make them all powered. Unfortunately, that was going to be quite expensive. So the next reasonable option was rotating backstops. This created 2 issues. I needed to have them square to the bed through the full rotation and I want them adjustable for after I drop a big log on them and need to re square them.

I went through many iterations in my head and in AutoCAD, I just couldn’t find anything I liked.
So here is version 1: This is how it started. I tried to weld tabs to the bottom of the bunk square to the bed rail. I was not very successful. Welding upside down can be quite challenging, especially with the low ground clearance under the mill. Since I did not get those tabs perfect my backstop would pull away from the rail as it rotated. End version 1.







Version 2: after what I considered epic failure, I did not take any pictures. Instead, I went and tilled the garden.

Version 3: I decided I need to make the backstops adjustable in 2 planes. I needed to be able to rotate it to keep it parallel to the rail and also keep it perpendicular to the bed. I decided trying to use tabs on the frame was far to challenging and not strong enough. I ended up using 2x3 tube welded to the frame for my hinge. The angle will have the pivot point for the vertical once I get to that point.



This picture you can see the adjuster bolt I added to make the fine adjustments after its welded in place. It ended up working out better than I expected. Unfortunately, it requires a good deal of fabricating.


The vertical piece will have a pivot pin on the top of the open tube and an adjuster screw on the bottom. That will take care of keeping it perpendicular to the bed.




This is with the backstop in the vertical position you can see the angle where the vertical pivot will be along with the hinge setup.




This is up inside the hinge block. It is the only way I could make it adjust in both directions and stay put after getting it set. There is a small piece of angle with a hole drilled in it for the bolt to pass through and a nut welded to that angle. The threaded rod then is rotated to slide the bolt in a slotted hole. I only slotted the one side to force it to pivot. The nut is there to lock it in place after it is set. Ignore the extra holes it took me almost all day to come up with this, and a few different attempts at hole placement.



I finally managed to squeeze this design out on Sunday. Man do I hate design funks…



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