Sariel Posted October 1, 2012 Posted October 1, 2012 (edited) Le video: Le reading: http://sariel.pl/2012/09/caterpillar-740-ejector/ Le gallery: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=513747 The gearbox switching idea by Mbmc. To mr. Ryan - if the arm on the front end loader seems long, it's because this is a high reach arm that JCB offers as an option. It's supposed to be this long. Edited October 2, 2012 by Sariel Quote
Bricktrain Posted October 1, 2012 Posted October 1, 2012 Looks excellent. Surely no Mr Ryan here would criticise anything? Quote
lukeandahalf Posted October 1, 2012 Posted October 1, 2012 Seems to sort of lurch along at slow speeds? Love it when the hamster makes an appearence Quote
Edwin Korstanje Posted October 1, 2012 Posted October 1, 2012 Realy good Caterpillar sariel Olso the locking diffs are great, can you control it by the remote?? The turning back off the hamster is fun too see Quote
Alasdair Ryan Posted October 1, 2012 Posted October 1, 2012 (edited) Looks excellent. Surely no Mr Ryan here would criticise anything? Think again....... I could not see any pictures of a real one with a long arm..... Normally you just get a high tip bucket attachment (this is the bucket its self which works like the mini dumper trucks). About the dumper I still think the front end slopes down way too much at the front. Edited October 1, 2012 by Alasdair Ryan Quote
Sariel Posted October 1, 2012 Author Posted October 1, 2012 Seems to sort of lurch along at slow speeds? That's the downside of a complex drivetrain with a lot of backlash and a heavy model. Olso the locking diffs are great, can you control it by the remote?? Yes, I'm using my autovalve for this. I could not see any pictures of a real one with a long arm..... Let me help you then. Go to JCB's website: http://www.jcb.co.uk/products/Machines/Agricultural-Wheel-Loaders/457-AGRI/Benefits.aspx Click "Product brochure", download, open, look at page 1. Quote
Alasdair Ryan Posted October 1, 2012 Posted October 1, 2012 (edited) Found one. These machines are build to carry waste around landfill and recycling sites. Remember to add the thumb as well above the bucket. Edited October 1, 2012 by Alasdair Ryan Quote
Saberwing40k Posted October 1, 2012 Posted October 1, 2012 Very nice, very unusual. I'm just worried about your differentials, as the truck has no axle reduction. Also, why do you want to cut off your poor hamster's foot? Quote
Alasdair Ryan Posted October 1, 2012 Posted October 1, 2012 why do you want to cut off your poor hamster's foot? He is a hamster killer.............. :roflmao: Quote
Sariel Posted October 1, 2012 Author Posted October 1, 2012 Also, why do you want to cut off your poor hamster's foot? He's got so many of them, one less should make no difference ;) Quote
Darth Dino Posted October 1, 2012 Posted October 1, 2012 Hi that is a 99% perfect Dumpster plus a 1% Hampster ;) Dino Quote
Tamas Juhasz Posted October 1, 2012 Posted October 1, 2012 Sariel: It was a big surprise to me when I saw my gearbox in this moc, but the biggest was that you didn't wrote it's not your idea. Please do it. If you use somebody's idea, then write in every description, video, what's the situation. Like I did in a few of my mocs. The gearbox has also a post(11th in this topic): http://www.eurobricks.com/forum/index.php?showtopic=70284&st=0&p=1298278&fromsearch=1entry1298278 Folder: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=504221 Quote
timslegos Posted October 1, 2012 Posted October 1, 2012 Looks like a great model, although the turning radius looks a little large. tim Quote
Sariel Posted October 2, 2012 Author Posted October 2, 2012 (edited) It was a big surprise to me when I saw my gearbox in this moc, but the biggest was that you didn't wrote it's not your idea. Please do it. If you use somebody's idea, then write in every description, video, what's the situation. Like I did in a few of my mocs. The gearbox has also a post(11th in this topic): http://www.eurobricks.com/forum/index.php?showtopic=70284&st=0&p=1298278&fromsearch=1entry1298278 Folder: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=504221 To be clear: the gearbox itself is a gearbox I developed back in 2007, just heavily reinforced with liftarms: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=279654 While it looks quite similar to your gearbox design, I can't help but notice that it precedes it by nearly 5 years. But yes, I used your idea for switching it with two motors, but I've seen it quite a while ago and I could not find the author when I finally put it to use. Guess I should have written your name down when I saw it, sorry. In any case, I added information at my website, in this topic and at the YT video. Hope that makes it alright. While at it, your autovalve from 2010 ( http://www.brickshelf.com/cgi-bin/gallery.cgi?f=443044 ) looks rather similar to mine from 2007 ( http://www.brickshelf.com/cgi-bin/gallery.cgi?f=282715 ) and I haven't noticed any credit either. Edited October 2, 2012 by Sariel Quote
Tamas Juhasz Posted October 2, 2012 Posted October 2, 2012 (edited) Thanks, I see. Everything ok. (I thought you just have forgotten it, no problem. I used to write the builders name in the file I save, when I saw something interesting) The gearbox itself is yours, but it's also a modified 8880 gearbox, and as you wrote based on Erik Leppens design( http://www.brickshelf.com/cgi-bin/gallery.cgi?f=279654 ; http://www.brickshelf.com/cgi-bin/gallery.cgi?i=2513289 ). This 4 speed gearbox is a very general one, if you want to build in this size, you don't have many possibilities. The challenge isn't in the building of the gearbox, but in the control. To control without NXT or RCX. When I built that, I didn't want a stepper, I wanted a definite control - one controller lever and direction --> one gear. You have right with the autovalve, I modified the description. The situation is that I made it exactly for my excavator, a compact, dual autovalve was needed. The novelty was the formation. Edited October 2, 2012 by Mbmc Quote
Sariel Posted October 2, 2012 Author Posted October 2, 2012 Thanks for understanding. Your 2-motor control idea is brilliant in its simplicity :) Quote
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