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  #341  
Old 05-02-2014, 10:52 AM
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Default Re: First build ,cat D11

Congratulations on a very fine model! I agree with Avel, the drive system is the quietest I've (not) heard. Looks like you got the hydraulics problems worked out quite well. An observation: the hydraulics are much quicker than prototypical. I did a double-take on the blade and ripper speed - I'm sure it is personal preference, so no problem. They work great!

Surprised your dogs stayed back and just barked. My yellow lab, Stella, is drawn to noise, so she would have been down there sniffing and batting it with her paw.

Ken
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  #342  
Old 05-02-2014, 11:19 AM
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Default Re: First build ,cat D11

Thank you, it's going to see some dirt this weekend. I will get some video. The hydraulics can be operated very slow, it's my fingers that have to learn. I may change some expo in the settings. For now I'm just going to learn as is. I do have to reverse ripper lift, I like airplane controls where up stick is actually down blade and ripper. Pulling back on stick is up blade and up ripper.
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  #343  
Old 05-02-2014, 02:39 PM
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Default Re: First build ,cat D11

Very nice to see it moving, seems to work great! Looking forward to the dirt video!

Love when the barking dog peeks under the other like he's scared to death!
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  #344  
Old 05-02-2014, 04:51 PM
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Default Re: First build ,cat D11

Congratulations on a very fine model! Looking forward to a "Dirty Video"
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  #345  
Old 05-02-2014, 07:42 PM
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Default Re: First build ,cat D11

After work I had the opportunity to throw a battery in and run it. First I had to finish installing the skid plates. For some reason they were the hardest to line up get the screws in. I had a lot of clearance room for the screws but paint must have been just enough to throw it off. And realized that 4 of the bolts are inaccessible unless I remove the equalizer bar. It was bad enough that I was laying on the ground with the dozer between the bench and a table supported by blade and ripper!! I had oil in and didn't want to chance some spilling out after I had to clean up from the last blow out. I ran about 10-12 min on a fully charged 5000mah battery with ending with 41% left. So if I run two 5000mah I should be able to enjoy a good 30+ min of runtime. Is that what you guys are around? Sorry I did not get any video but I will tomorrow as it's being moved to its destination. I tore up my yard near the walkway (bunch of dead grass/clumps) but taking it easy on sharp turns in grass the tracks and guides seem to be working well. No hair raised scared cat in the tracks, they layed flat. I do have to reshape the ripper, being flat on the cutting edge it just balled up a lot of dirt. Will post more tomorrow.
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  #346  
Old 05-02-2014, 09:45 PM
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Default Re: First build ,cat D11

Looking good! give your ripper shank a little bit of a bevel on the leading edge, to make it less blunt, then it will pull easier. Had the same problem with my skidsteer ripper.
Cheers, Neil.
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  #347  
Old 05-02-2014, 11:49 PM
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Default Re: First build ,cat D11

Cool, can't wait for a video of this beast pushing dirt.
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  #348  
Old 05-03-2014, 06:51 PM
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Default Re: First build ,cat D11

http://youtu.be/y_ZFgqNrcdI

First dirt run. It's down at our river lot. Where I end up spending most of my summers. The soil is very sandy/silty river bank dirt. Only problem is there are a lot of finger roots from whatever is around. This soil has not been tilled just was raked off last year for our 1:14 scale race trucks. Two roots about the size of my pinky were stopping the dozer. At the end I lost right side drive, found out the set screw on sprocket must have loosened up. It's the sprocket on the motor shaft, yup the one that I have to practically take it completey apart to get to. I don't think the shaft has a flat, if it doesn't it will before it goes back together.
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  #349  
Old 05-03-2014, 07:11 PM
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Default Re: First build ,cat D11

<a href="http://s1357.photobucket.com/user/cooperford/media/8985CB5F-3EFE-4F88-B4FC-5484A652A463_zpsqifdkibp.jpg.html" target="_blank"><img src="http://i1357.photobucket.com/albums/q750/cooperford/8985CB5F-3EFE-4F88-B4FC-5484A652A463_zpsqifdkibp.jpg" border="0" alt=" photo 8985CB5F-3EFE-4F88-B4FC-5484A652A463_zpsqifdkibp.jpg"/></a>
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  #350  
Old 05-03-2014, 07:12 PM
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Default Re: First build ,cat D11

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  #351  
Old 05-04-2014, 02:49 PM
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Default Re: First build ,cat D11

Aesome Cooper ..you have come up with a very fine peice of equipment..Now you will be able to keep that track well maintained ..that ripper will take care of any weeds ...I really like that those motors are so quiet ..will work well with the new sound modual

BTW some of your pics didnt show up
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  #352  
Old 05-04-2014, 03:03 PM
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Default Re: First build ,cat D11

Great to see the big Cat running around under it's own power. In your videos, I like how it pretty much pushed everything that was in it's way, out of the way. It looks like a lot of fun to run.
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  #353  
Old 05-04-2014, 05:28 PM
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Default Re: First build ,cat D11

I uploaded that pic of a root from my phone and copied the wrong link. .

Had to take her apart to investigate the drive problem, it wasn't too bad to get the motors out. I didn't have to mess with any of the hydraulics or electrical. (Well, disconnected two motor wires. )




After pulling the motor I found this was the problem, in the video you can see when it breaks. I don't think anything was binding I think it may have been locked onto a root and just the power of the motor broke the sprocket. And I did not have that second set screw in there where the fracture occurred.


I do have two 11 tooth sprockets. The sprockets on now are 9. I did want a bit more speed for reversing and I have them so I think I will try them. They are the shiney ones in the above pic. A lot more meat on them. Only thing I have to do is make a new motor shaft as the small ones are 1/4" and the others are about 3/8". I still have the clearance for chain and everything else. Next time I dig up some bigger roots I will snip them with hand shears. I know this is a beast but it's not indestructible. We may even till up the track so roots will not be an issue.
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  #354  
Old 05-04-2014, 05:35 PM
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Default Re: First build ,cat D11

Quote:
Originally Posted by Espeefan View Post
Great to see the big Cat running around under it's own power. In your videos, I like how it pretty much pushed everything that was in it's way, out of the way. It looks like a lot of fun to run.
Thanks guys, yes the motors are super quiet. The noise is from the pump and pump motor. If it's not on you can't hear the drive motors running. I guess I'll start looking into that sound module. . Hope to get those motor shafts done and back together in a few days, then some more videos. Possibly bring a load of fresh rock and root free dirt into the back yard too!!
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  #355  
Old 05-04-2014, 07:12 PM
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Default Re: First build ,cat D11

Can I run more than 12v through the premacon pump? Esc says 2-6 lipo, I'm running 3 was thinking about running 4s. 14 volts ? And I know a lot of people overvolt electric motors, was thinking of running them on 4s? Or is this a bad idea? On robot marketplace they sometimes say if a motor has been know to take a few more volts than rated (and hold up). Reason why I'm asking is after looking at parts on the sprockets I would have to enlarge the hole on frame to have clearance for the larger sprocket. I'm not sure I want to go that way, I would have to get rid of the shaft end support bearing and rely on just the motor housing bushing that I already shortened for sprocket clearance. Now I'm leaning towards getting another 9 tooth sprocket, that's why I'm inquireing about overvolting to 4s. How would the pump fair out if I ran it at 80% max on 4s? I've always been told esc run best at wide open (less heat up).
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  #356  
Old 05-04-2014, 07:40 PM
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Default Re: First build ,cat D11

See what your esc is rated for . You can set your end point back a lil if your esc can handle the voltage . I have done this on my Mack using the 6V UMS pump for dumping and run the truck on 12V .
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  #357  
Old 05-04-2014, 08:07 PM
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Default Re: First build ,cat D11

So that root the size of your pinky is about the equivalent of a 8" diameter tree ? Dang - I'd say your doing just fine!
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  #358  
Old 05-04-2014, 11:16 PM
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Default Re: First build ,cat D11

Well after looking into all the possibilities I ordered more sprockets to fit the 1/4" shaft for the motors in use. I was investigating the broken sprocket and it's a type of cast/forged metal, very porous in the break area. I can't tell for sure but it looked as if had some stress crack elsewhere. It may have been weak to start with. I don't know if it would have made a difference with the other set screw installed. To me it looked like it rotated a bit then after the set screw slid to the end of the flat spot on shaft it put a bit of an oblong force to it creating the break. And broke at the weakest point (where the second set screw should have been. And I also ordered a pair of 10 and 11 tooth sprockets with 1/4" shaft to keep everything how I originally built it. Not messing with voltages as it is running fine how it is. I just want a bit more speed for long backing up passes.

Operating it is just as much a learning curve as building. Something could have gotten lodged in tack also. I know when I'm on full size machines I'm always looking out for things that could cause damage. You know like not having your wife crank the power stearing on a road you are building with a machine that has just dumped shale on. Yup, sliced the **** out of the tires. but she was dropping my lunch off) lol!! McMaster -Carr has them and I ordered tonight so I will have them Tuesday. As long as I order before 3 I have parts next day, except Sunday. I guess warehouse is close.

After running for about 45 min should I change the oil to get rid of any contaminates from the building process? And I had some dark oil come out of cylinders when I took them apart while mocking up. I thing the polish compound had some on shafts and cylinders resulting in that. I am using hydralic oil so it's basically unlimited source for this little machine. 5 gallon should last a couple years .
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  #359  
Old 05-04-2014, 11:45 PM
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Default Re: First build ,cat D11

I would change it. At least empty the tank, then run/cycle some more and empty again. The first time I ran the hydraulics on my loader for about an hour, not moving just setting speeds and mixes and lifting things, the oil came out pretty dark. All later oil changes it wasn't as dark. Yeah color isn't everything, but its never been as dark since, even after running for two hours in the sun.
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  #360  
Old 05-05-2014, 12:16 AM
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Default Re: First build ,cat D11

I use 4s in my Vario hoe with no troubles... virtually the same pump & motor that you're using. What voltage are your drive motors rated at?

I don't remember seeing a hyd filter during your assembly, do you have one? You could change your oil now, but a little discolouring is nothing to worry about.
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