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Author Topic: Not dead, just busy, very busy engineering and reengineering and rereengineering  (Read 3279 times)

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Offline arnold113

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:) :embarassed:The last year I've spent many many hrs  working on my mill. I've finally got it almost finished. At least for manual operation. I'm having lots of problems getting the speed and position controls working right. Well, today I just couldn't wait any longer. I just had to make some saw dust. I loaded up an oak log I had laying around waiting to be cut up for fire wood. I thought I would quarter it up so I wouldn't have to split it. I should have split it!!! Not knowing nuch of anything about sawing, I was very nervous. I had a little problem with the engine surging and while I was working on that things began to go bad. What with the surging and the fact that I had forgotten to tighten the lug nut on the wheels, the band came off the back side of the tires. Of course the band had to climb the guide rollers to do that. Goodbye tooth set on one side. I finally got everything fixed and thought I would try again. I haven't got any bands ordered yet, just had one band I had to design around so I had to use the band I had just ruined. Now things got really bad. I made it about 3 foot before the band dove. Really dove. A few minutes into my new sawing life and I had my first broken band. No more sawing until I can order some bands.
I'll see if I can remember how to load some pictures I made today.

This message was supposed to be first but I did something wrong. Oh well, You get the picture. More pictures in my gallery if you're interested.
Arnold113
DIY band saw mill: four post, 25 HP gas engine, 32" x 18' portable, 24 vdc and hydraulic controls, pineywoods log turner, hyd log loader. RF remote controls for mill.  DIY set works.

Offline fishfighter

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Nice looking mill. In the rush of things, we all screw up. ;D

Offline thecfarm

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Looks like you have been busy.
Model 6020-20hp Manual Thomas bandsaw,TC40A 4wd 40 hp New Holland tractor, 450 Norse Winch, Heatmor 400 OWB,YCC 1978-79

Offline vfauto

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Nice job! I am looking at add log stops to my mill and was wondering if you would be willing to share pictures and design info on the ones you built? You cam PM me if you would rather not share here.

Thanks in advance
Frank
The definition of insanity is to do the same things over and over and expect a different result!

Offline drobertson

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Looks like a lot of work you have done, the only way to work out the bugs is get in with them, time, patience, endurance,  I was wondering what those bed rails are made?
only have a few chain saws I'm not suppose to use, but will at times, one dog Dolly, pretty good dog, just not sure what for yet,  working on getting the gardening back in order, and kinda thinking on maybe a small bbq bizz,  thinking about it,

Offline Joe Hillmann

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That is one heck of a sawmill.  In the very last photo there is a hydraulic cylinder at the end of the bed.  What is that for?  Also if you have time I (I am sure others as well) would like to see lots of photos along with descriptions of what it is and how it works.  As far as breaking a blade, there will be lots of little mistakes before you get it all figured out.

Also what are you using for the engine and what is the black pile of parts hanging off it just above the pulleys?

Offline Hilltop366

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Lots going on there, keep picking away at it to get the bugs worked out one at a time!

Thanks for sharing.

Offline sawguy21

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Nice work, it looks very professional. The engine appears to be a Wisconsin THD.
old age and treachery will always overcome youth and enthusiasm

Offline pineywoods

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Nice going Arnold.. That thing is built like a tank. I see quite a few pieces that I recognize..Now comes the tweaking..
1995 Wood Mizer LT 40, Liquid cooled kawasaki,homebuilt hydraulics. Homebuilt solar dry kiln.  Woodmaster 718 planner, Kubota M4700 with homemade forks and winch, stihl  028, 029, Ms390
100k bd ft club.Charter member of The Grumpy old Men

Offline ljohnsaw

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That is one heck of a sawmill.  In the very last photo there is a hydraulic cylinder at the end of the bed.  What is that for?  Also if you have time I (I am sure others as well) would like to see lots of photos along with descriptions of what it is and how it works.  As far as breaking a blade, there will be lots of little mistakes before you get it all figured out.

Also what are you using for the engine and what is the black pile of parts hanging off it just above the pulleys?

Looks like a roller toe board - nice!
John Sawicky

Just North-East of Sacramento...

SkyTrak 9038, Davis Little Monster backhoe, Case 16+4 Trencher, Home Built 42" capacity/32" cut Bandmill up to 54' long - using it all to build a timber frame cabin.

Online Magicman

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Well, at least it all looks good.   smiley_thumbsup   :)
Knothole Sawmill, LLC     '98 Wood-Mizer LT40SuperHydraulic   WM Million BF Club Member   WM Pro Sawyer Network

Never allow your "need" to make money to exceed your "desire" to provide quality service.....The Magicman

Offline arnold113

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Thanks for all the comments. I'll try to answer your questions one at a time: vfauto- I'll be glad to share with everyone. That's what this forum is all about. I'll have to remove the guards and take a picture or two and then explain from there how I built my log stops. I'll get that done real soon and post.
drobertson- My rails are 2 1/2" x 1/4" angle upside down supported every two feet on the 3" pipe that the trailor/frame is built with. The angle is bolted down on the two ends only. Free to float in between.
Joe Hillmann- The hyd cylinder is one of two rolling toe boards. I have quite a few pictures in my gallery but without descriptions. I hesitated in posting too many pictures at a time on the forum cause I didn't want people to think I was trying to take up too much of the forum's space. I'll try to add descriptions in my gallery as soon as I can and I'll post more pictures with descriptions on the forum if everyone can put up with me. The engine is a 2 cylinder 18 hp Wisconsin THD. That pile of parts is a linear positioner with 2 limit switches that controls engine speed. It speeds up the engine at the same time that another linear positioner slides the engine  away from the intermediate shafts and pulleys. The engine's linear positioner has two limit switches to stop movement. The spring loaded idler on the engine v belts is what provides the tension on the belts. That way I don't have to rely on the linear positioner stopping at the right spot every time to give the right tension. The idler  has a stop on it so it'll only raise up so far.
If anyone else has questions please ask and I'll try to answer them. The way I have done things probably isn't the best way but it's my way.
DIY band saw mill: four post, 25 HP gas engine, 32" x 18' portable, 24 vdc and hydraulic controls, pineywoods log turner, hyd log loader. RF remote controls for mill.  DIY set works.

Offline Brucer

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Very nice. Meticulous workmanship.

I'm going to take a guess at your log stop design -- rack and pinion, only instead of a rack you used lengths of chain, and instead of a pinion you used a sprocket on a shaft that runs down the mill, with a couple of idler sprockets above and below the drive sprocket.
Bruce    LT40HDG28 bandsaw with two 6' extensions.
"Complex problems have simple, easy to understand wrong answers."

Offline arnold113

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Real close, Brucer. The (rack) is 80 pitch roller chain but its welded to the log stops. The shaft turns a sprocket(pinion) which drives the stops up and dn.
A more detailed explanation will follow soon.

Sorry folks, I spent a few hrs adding comments to my gallery only to have them all wiped out when I tried to apply them. Just not in the mood to go thru all that again right now.
DIY band saw mill: four post, 25 HP gas engine, 32" x 18' portable, 24 vdc and hydraulic controls, pineywoods log turner, hyd log loader. RF remote controls for mill.  DIY set works.

Offline Dad2FourWI

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Look like a lot of hard work and thinking went into that!!!

Beautiful job!!!   ;D

Take your time and you will be making dust soon!

-Dad2FourWI
LT-40, LT-10, Bobcat T750 CTL, Ford 1910 tractor, tree farmer

Offline gww

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I would be more then willing to trade my cobbled together mill for yours  :D.  I really hate taking picture but love when you do.  I love other peoples pictures and explinations.  I also agree with how intimidating your first few cuts are, I know I was intimidated with mine.  I look at the weak thing I put together and reconize the amazing amount of work you have in your mill.  I hope you end up with everything you expect out of it.  I am here to get advice, not to give it but I have been helped with the bugs in mine at this forum.
cheers
gww

Offline CaseyK

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Looks great Arnold
Keep the pics and coming
Home built automated twin blade

Offline CaseyK

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Finally got a chance to take a closer look in your gallery & im impressed.
Are the up and down motor and the feedworks motors 24v wheelchair motors with brakes?
What type of speed controller did you use to control the motors speed?
Are you using one of the 12channel wireless remotes to control the relays in the control box?

Thanks
Home built automated twin blade

Offline arnold113

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CaseyK, Yes the motors are 24 volt wheelchair motors but I removed the brakes. I needed to mount encoders on the motors for feedback to the controller. The controller accepts commands from a PC or microcomputer and then tells the motor drive what position to go to and at what speed. It also keeps track of where the motor is by way of the encoder feedback. The controller is called a Kangaroo and the PWM motor drive is called a Sabertooth. The drive and controller takes care of two motors. They were engineered for robots (as in robot wars). They are sold by Dimension Engineering.
I assembled a remote control using the two 12 channel remote transmitters so I now have a 24 channel RF remote. When I finish up the microcomputer program and get the motor controller tuned I will be able to run the bandsaw from the remote.
I uploaded a few more pictures today so I'll post them.

 

This is my diesel drip band lube. It is applied via a felt wick.

 

 

I also have a water lube/coolant system using the same felt wick.

 

You can see the two tubes coming down from above. I just hook up which one I want to use. The felt wick wets both sides of the band.

 

This is a shot from under the band carriage. You can see the linear positioner for the engine v belts tensioner.



I was concerned that my carriage might tip over so I made some brackets that hook under the rails.

vfauto, The next three pictures and a drawing will show how my log stops work.

 
 

DIY band saw mill: four post, 25 HP gas engine, 32" x 18' portable, 24 vdc and hydraulic controls, pineywoods log turner, hyd log loader. RF remote controls for mill.  DIY set works.

Offline 5quarter

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Arnold...That's some mind blowing engineering! :o :o
What is this leisure time of which you speak?
Blue Harbor Refinishing


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