Re: Great Dane excavating co.
 

Thank you all, I’m great full and happy to see another birthday. When I was younger I just couldn’t wait to turn another year older. Now,,,, the time flies by and before I know it ,another year has past!! Not looking forward to celebrating anymore birthdays but definitely looking forward to having many more!! Cheers and thank you all. :)

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psjhxp659u.jpg

http://i1357.photobucket.com/albums/...ps9ppqrkw1.jpg

http://i1357.photobucket.com/albums/...ps8rcmshbf.jpg

http://i1357.photobucket.com/albums/...psyscz4dcz.jpg

Bucket dump, lift and articulation cylinders being made. Using steel tube (seamless) for bucket and steering cylinders. Had to use stainless tube for lift cylinders. Couldn’t get the right size I wanted in steel. Still needing to machine bottom caps and oil ports.

Re: Great Dane excavating co.
 

Everything is steel except pistons, they are aluminum.

Re: Great Dane excavating co.
 

The man is working in steel great job DB very nice work.Ed

Re: Great Dane excavating co.
 

What bore diameters?

Why not double O rings on pistons?

Re: Great Dane excavating co.
 

Lift cylinders are .805” calculations are @ 300psi 153# pushing and 130# pull

@ 250 psi it’s 127# and 108#. Now that is the theoretical force from cylinders not the actual force at tip of bucket teeth. Shooting for it to be able to lift whatever heavy object that fits in bucket. 👍🏼👍🏼

I just decided to use one o-ring on pistons because I don’t see the need for 2. I haven’t had many hydraulic problems on past built cylinders. I do have two seals in the rod/cylinder head. One more so a dust seal. Tollarances are +.001” larger diameter for rod to pass through. And these cylinders don’t really have the dynamic side loads to keep rod and cylinder in line. And on the steering and lift cylinders the single O-ring gives me that little bit more travel. I’m trying to have lift arms go a bit higher than the 1:1 machines to have dumped bucket clear sideboards on the haul truck. They will but have the room so just some insurance I guess 😜. And like I said I’m using seamless tube that will be honed and polished internally. The rod is ground tight tolerance stock.

Re: Great Dane excavating co.
 

P.s. those numbers are per cylinder. (One)

Re: Great Dane excavating co.
 

How do you determine the size of your O-rings?

Re: Great Dane excavating co.
 

I use 1/16” orings. Actual size of .063” ring is .070. I cut .063 groove and size off of Inside diameters or outside diameter. Depending on tube or rod. Tube is measured by outside diameter , pipe is measured by inside diameter. I’ve found if you try and compress orings too much they are too tight for a low pressure hydraulic system like we have. Say I have a cylinder rod of .25 I will usually use a oring of .25 inner diameter. And account for the actual size of oring to be the compression. And the groove is the static part the rod is the seal part. I’ll try and find some info I found a while back for you.

Re: Great Dane excavating co.
 

This is similar to what I reference

http://i1357.photobucket.com/albums/...ps4zxzrvyh.png

And also by trial and error, and feel :).

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...pskioderzc.jpg

Small ring is .063” the larger diameter ring is 1/32” .03125. I would love to use the 1/32 rings but I just can’t hold that tight of tolerance on my lathe. Would make the telescopic cylinders more scale :).

Re: Great Dane excavating co.
 

Time for a new cnc lathe

Re: Great Dane excavating co.
 

Thank you very much, great information. I've never done hydraulics before but have started on a project that will require me to fabricate my own cylinders as what I need to stay reasonably to scale is not available. I knew that O-rings were made to standardized sizes but no idea how to figure out how much compression was needed to make them work properly. Have you ever tried X or quatro rings? From what I've read on them they can be used as direct replacements for O-rings as they are the same size and could provide a better seal at lower compression or pressure.

Re: Great Dane excavating co.
 

Yeah, I can do basic math. ;) :D

So let's figure out the negative leverage ratio to determine how much lifting power you'll have at the bucket's cutting edge.

What's the distance from the hinge point at the rear of the arms to where the cyls connect on the arm?

And what's the distance from cyl's connection on the arm to the bucket's cutting edge (bucket horizontal)?

Re: Great Dane excavating co.
 

Working on getting some measurements for ya joe,

Picture dump,,

http://i1357.photobucket.com/albums/...psntvjxxkb.jpg

http://i1357.photobucket.com/albums/...psorjwwe2j.jpg

http://i1357.photobucket.com/albums/...pszmd05pjz.jpg

Left one was first one, right one was after I tweaked the cam a bit and better finish.

http://i1357.photobucket.com/albums/...psnjvbl178.jpg

http://i1357.photobucket.com/albums/...ps7zja34zh.jpg

This is the front and back cover for transfer case, another part will be between them tohouse gears

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...ps7qwticoc.jpg

My birthday present, I’ve always wanted a stuffed armadillo and my parents now live in Florida so I told them to be on the lookout for a stuffed armadillo. They haven’t found one yet so the got me this one ;).

And st Patrick’s Day, Beth’s friend visited us with her Irish wolfhounds , so ira, ours got roolay with his own kind. This was hers saying hi to me in the shop

http://i1357.photobucket.com/albums/...psfnq8mgpn.jpg

http://i1357.photobucket.com/albums/...psehulyhnn.png

And some scale pics

http://i1357.photobucket.com/albums/...psoczteqnt.jpg

http://i1357.photobucket.com/albums/...pspf2vlnlb.jpg

http://i1357.photobucket.com/albums/...psckgkdeeo.jpg

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psgskebnxm.jpg

http://i1357.photobucket.com/albums/...psgskebnxm.jpg

http://i1357.photobucket.com/albums/...psmfpudjvg.jpg

http://i1357.photobucket.com/albums/...psmfpudjvg.jpg

http://i1357.photobucket.com/albums/...pskjaik4xj.jpg

And yes I changed designs on cylinders. I did make them out of steel but then switched to brass. Several factors at play for that choice. I was using 12l14 steel (high lead content) easy to machine but I didn’t realize it doesn’t like welding or brazing temps much. And also after realizing I’m planing on having several more small pieces added to cylinders for hard lines I would run into heating up parts I don’t want to heat up. With brass I can control the temp better and block the heat transfer easier. And the hard lines will be easier to fabricate withbrass tube. But one benefit, I now have spare parts from steel for future projects !! Lol!!

Re: Great Dane excavating co.
 

Nice update today. Glad you're getting further along.

Re: Great Dane excavating co.
 

wowzers! That thing is even bigger then I thought it'd be. Seeing er next to the dumper like that really makes the reality of how mamouth a machine that is!

Re: Great Dane excavating co.
 

Very nice work cooper-the detail work on this machine is outstanding!! Should make a great model and probably move a lot of dirt but I'm not sure I would want to get it dirty. Oh yeah-I like the "possum on the half shell" as we call it.

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psyv6huk9v.jpg

http://i1357.photobucket.com/albums/...pstd5uftxh.jpg

http://i1357.photobucket.com/albums/...psxwoiukdk.jpg

http://i1357.photobucket.com/albums/...ps8vnxyypc.jpg

http://i1357.photobucket.com/albums/...ps3wevj4s7.jpg

This is the transfer case.

Re: Great Dane excavating co.
 

It's not just a transfer case.....it's pure Awesomeness ! Getting closer and closer to move around on its own power.

Re: Great Dane excavating co.
 

Hi Cooper


Looking good man looking very good.
It will soon be pushing you and the dog around under its own power.

:):):)

Re: Great Dane excavating co.
 

should have a esc and motor arriving soon. Have the basics of the driveline done. Still need to weld up and some more details. This is a pic of the spider being machined. Did it in the mill then remove from collet block and part off on the lathe. Rotary table would be nice but don’t have one and then setting up for a simple opp,, I’ll keep with the collet blocks for now.

http://i1357.photobucket.com/albums/...psetnblga2.jpg

And some shots of universal.

http://i1357.photobucket.com/albums/...pse1zgp5fs.jpg

http://i1357.photobucket.com/albums/...psynk15mab.jpg

http://i1357.photobucket.com/albums/...psybdxonvz.jpg

http://i1357.photobucket.com/albums/...psw4imo0bx.jpg

Re: Great Dane excavating co.
 

Get a Hardinge HV-4 5C collet indexer. Look on ebay.
You really don't need a rotary table since you have your CNC mill.

Re: Great Dane excavating co.
 

Very nice, I like the idea of combining set screws with pins to connect the parts. Using thread lock to keep them from backing out? Also, how did you make the slip joint? Broach?

Re: Great Dane excavating co.
 

Yes the two joints , one under front frame and one right before rear pinion are broached keyway joints. With this driveline the universal is centered at articulation joint and the driveline is all on the same plane. So I don't need the driveshaft to slip in or out during use. But if for some reason the joints can be easily modified by only clamping on one end and letting the other float. The keyways are cut to length so keys cannot slip out if need be. I don't see needing any expansion/contraction joint on a one plane driveline, but it will not be know until I get a few more steps done. Hopefully tomorrow after all holiday events are done I'll have it spinning. I still need to cut gears from gearstock. Top and bottom transfer gears are boared and keyed, the two center gears I'm going to cut the shafts all in one with the gearstock. I'm waiting on a better fitting collet to arrive so I can machine the gearstock. I can center it in a 4jaw chuck with some soft shims so not to damage the gear but indicating it would be a pain in but. That's why I am waiting on a better sized collet, then I can use the collet blocks or even just the collet to hold it while lathe work.

Re: Great Dane excavating co.
 

Thanks for explanation. I agree that your particular setup doesn't need to slip back and forth during actual use and your two spline setup will work fine. Just noticed it in one of your pictures and was curious as to how you made it. I look forward to seeing the rest of this amazing build. Thanks very much for sharing.

Re: Great Dane excavating co.
 

I would assume he is stacking another cup set screw on top of the ones with pins to lock.

Cooper, Get a soft collet and bore it to fit your gear diameter.

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psqj34ziop.jpg

http://i1357.photobucket.com/albums/...pso0efl3qc.jpg

http://i1357.photobucket.com/albums/...pskn02ud4d.jpg

http://i1357.photobucket.com/albums/...pszhtjsvug.jpg

http://i1357.photobucket.com/albums/...psvzt7vzq0.jpg

http://i1357.photobucket.com/albums/...psjlspqt5l.jpg

http://i1357.photobucket.com/albums/...psy0gy1ugo.jpg

Transfer case done along with drive shafts. Also made a attachment plate for mounting motor to gearbox. Waiting on some gearstock to make a one piece coupler from motor to gear inside gearbox. Went with a fairly low kv motor that is sensored for easy start up and soft transfer of power to drivetrain. Using tekin rx8 esc with a 1400kv motor on 3s voltage. That gets a reduction in the gearbox of 4:1, 4:1, 3:1 then into transfer case all 1:1 then into axles with a 3:1 differential. Very similar to the haul truck. I think I used a 1900kv motor on that set up. With this machine I’m more looking for the motor to spin up closer to full speed while keeping machine slow and smooth power.

Re: Great Dane excavating co.
 

And that last pic, the motor and gearbox are underneath that plate. The 4 black bolts are some of the gearbox mounting hardware. Bunches of room on top and to the back for hydraulics and batteries

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psessvcml2.jpg

http://i1357.photobucket.com/albums/...pszf6sh9wz.jpg

Made split couplers for the driveshafts. Makes it easier to set the transfer case and line up. I still need to cut the keyway in them.

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psphoks01o.jpg

http://i1357.photobucket.com/albums/...psd6hqjapo.jpg

Connected to the shafts and keyway cut in.

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...psbk6blr7a.jpg

Pic of the drivetrain

Re: Great Dane excavating co.
 

RW, at this pace, you'll have er up & runnin before next weekend!

Re: Great Dane excavating co.
 

http://i1357.photobucket.com/albums/...ps9hgzeij9.jpg

http://i1357.photobucket.com/albums/...pswwq5wgxw.jpg

Received more gearblank today. Cut a one piece pinion and coupler to go from motor shaft to first stage of gearbox. Now I think I can think about getting her to move :).

Re: Great Dane excavating co.
 

I have been getting a lot of other projects to pile up, wanting to get this one done and working!! Have a screening plant to build and get this loader running material :). Also have the springtime work to start doing. More life work and less time in shop :(.

Re: Great Dane excavating co.
 

Oh and another thing I did was to center drill a hole in the pivot joint pins. This will allow to properly align the universal joint with center of articulation. For it to function proper alignment is pretty critical. Straight no problem, :) but would bing during articulation if not lined up.

http://i1357.photobucket.com/albums/...psp48h6t6s.jpg

This is a 3/16” drill poked through centerline hole to line up with spider pins in universal before tightening the other set screws and couplers.

http://i1357.photobucket.com/albums/...psvnmsz92v.jpg

Re: Great Dane excavating co.
 

Ahh pinion wire is so nice to turn on the lathe isn't it.

Re: Great Dane excavating co.
 

I really look forward to watching what you come up with for a screening plant. I would bet it's going to be awsome.