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Re: Newbie Scratch Build - D575A Dozer
Excellent progress is being made, & it looks great, ESPECIALLY for a first build!
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Re: Newbie Scratch Build - D575A Dozer
Premacon sells a hydraulic pump & valve block that many ppl have bought before. https://shop.premacon.com/index.php?cPath=35 The pump/motor originates from this guy https://www.modellhydraulik.com/ though I'm not sure if the rotatory valves are exclusive from Premacon or not.
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Re: Newbie Scratch Build - D575A Dozer
Wow! Excellent work - details of tracks are really great, so I'm sure the rest of the machine will be exceptional.
Ken |
Re: Newbie Scratch Build - D575A Dozer
Quote:
Thanks for a the kind comments so far Rob |
Re: Newbie Scratch Build - D575A Dozer
Looks like your track pads are on the right track:D In post #19, I was looking at the angle of the bends and the grouser bar fit thinking that'll bind up as soon as they get some dirt/rocks/sand in them but I see you've made some adjustments and they look real good now.
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Re: Newbie Scratch Build - D575A Dozer
Few pics of things that are happening:
Experimenting with the track rollers: https://i.postimg.cc/6QRzwLpg/IMG_3851.jpg https://i.postimg.cc/D05BHvwz/IMG_3852.jpg https://i.postimg.cc/NGxJ54kw/IMG_3858.jpg https://i.postimg.cc/HssS5y68/IMG_3856.jpg These have come out really well and run nice and smooth. plus they add a lot of weight Track guides bolted together temporarily before welding together and milling to shape: https://i.postimg.cc/MKP9YpLP/IMG_3854.jpg https://i.postimg.cc/tTjkgZ1T/IMG_3857.jpg |
Re: Newbie Scratch Build - D575A Dozer
Great looking track parts, very well done!
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Re: Newbie Scratch Build - D575A Dozer
thanks Chris 👍🏻
It’s slowly getting into a functioning shape but I need to start focusing on finishing off everything and then start adding all the details that I want. I can see why some of these models take hundreds if not thousands of hours to complete. I guess when it finally moves a bit of dirt around it makes it all the more worth it ! Oh and the steel splinters 🤦🏼♂️ Rob |
Re: Newbie Scratch Build - D575A Dozer
Hi All
Hope everyone is safe and well ! Its been a wee while since I last posted any updates but I have been busy honing my skills and completing parts that just take ages (undercarriage). I have nearly completed one side and making fast progress on the other now that I know how it all works ! enjoy the update pics: https://i.postimg.cc/xjMm6NC5/IMG_4153_-_Copy.jpg https://i.postimg.cc/YCR20MSQ/IMG_4156_-_Copy.jpg https://i.postimg.cc/gJYvRYyd/IMG_4159_-_Copy.jpg https://i.postimg.cc/jSpcW0kd/IMG_4160_-_Copy.jpg https://i.postimg.cc/zXP0rRCh/IMG_4158_-_Copy.jpg https://i.postimg.cc/dtt5tfVN/IMG_4163.jpg https://i.postimg.cc/tRzrbbpV/IMG_4165.jpg https://i.postimg.cc/ncR0s1sF/IMG_4196_-_Copy.jpg https://i.postimg.cc/T3KQnWmr/IMG_4233.jpg https://i.postimg.cc/MTSDkPLD/IMG_4237.jpg https://i.postimg.cc/13bBB5cb/IMG_4238.jpg https://i.postimg.cc/q7XKKkms/TDWY6584.jpg |
Re: Newbie Scratch Build - D575A Dozer
Sorry about the photo bombing :eek: didn't realise I had done that many !
https://i.postimg.cc/MZd1pK4V/IMG_4204.jpg https://i.postimg.cc/L6WfjQms/IMG_4495.jpg https://i.postimg.cc/tCJWZGQf/IMG_4494.jpg working on the transmission and making good progress so fingers crossed I can get it moving under it own steam soon Rob |
Re: Newbie Scratch Build - D575A Dozer
Beautiful work!
Kerst |
Re: Newbie Scratch Build - D575A Dozer
This is pretty awesome (and I can appreciate the hours spent before each picture could be taken).
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Re: Newbie Scratch Build - D575A Dozer
Excellent work !
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Re: Newbie Scratch Build - D575A Dozer
The more photos the better! I also enjoy text. I love reading about how people make their own models and how they get around/solve problems along the way.
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Re: Newbie Scratch Build - D575A Dozer
Quote:
Today I was adding in some details to the drive sprockets and fixing details: https://i.postimg.cc/qBX8VTKC/IMG_4496.jpg https://i.postimg.cc/Wb1qBJjQ/IMG_4497.jpg https://i.postimg.cc/Hkj5y8hQ/IMG_4498.jpg https://i.postimg.cc/rscx0hBm/IMG_4499.jpg https://i.postimg.cc/dt5r3j4s/IMG_4504.jpg https://i.postimg.cc/YSG1JLNp/IMG_4506.jpg https://i.postimg.cc/d3qZthCZ/IMG_4509.jpg The drive and transmission has been the most time sapping process to date. as I am not of a engineering background this has taken maybe far longer than it should have. Although there are a few very amazing scratch builds on this forum there wasn't enough details to help me make a knowledgeable decision in my build. So this is what I have gone with : 24v motors https://gimsonrobotics.co.uk/categor...d-24v-versions 1:2 reduction bevel gears to make right angle transition Linear and thrust bearing on the internal shaft + locking nut Tapered roller bearing in the hub/sprocket to sort out both axial and radial loads? I will post some pics of the setup this week to illustrate more details to follow :) |
Re: Newbie Scratch Build - D575A Dozer
Mind dump incoming !
from my limited experience these are the following things I have learned that have made the most difference: Get a DRO ! - its all about making parts that are repeatable ! this makes it so much easier ( CNC is the next step maybe one day) Get quality tools if you can - you have probably heard this so many times before and I can attest buying a £20 M2 tap is far better than one that costs £2 ( trust me the cheap one will break on the first few holes whereas the other will just carry on for hundreds) Be methodical - making repeatable parts means cleaning between parts , resetting dials, taking your time. don't take short cuts. Design before any fabrication - as I am going along I actually wish I would have drawn everything up in Fusion 360 before I started. you can waste so much time re-centring / setting up parts that could be done in one . Vinegar cleans all the mill scale and heat (soldering) blackening off metal you could ever need ! ( Bio Carb soda stops the process). I wish I knew tis from the first day. clean stock metal is very helpful when making repeatable parts. I am still figuring out the rest ! Rob |
Re: Newbie Scratch Build - D575A Dozer
As someone who has never tried to build anything like what is found on these forums I find myself coming back everyday for updates and to admire the talent and ingenuity (and zero drama). Thank-you for sharing.
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Re: Newbie Scratch Build - D575A Dozer
Very nice work, looks beautiful!
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Re: Newbie Scratch Build - D575A Dozer
Hi Everyone
its been ages since i have updated my progress on the dozer but its been a crazy year and progress has been patchy. This is basically where i have got to since the summer: https://i.postimg.cc/YqqjKZwz/11.jpg Almost ready for a test run in the dirt ! :) Cant wait to see it actually move by itself ! ( blade and ripper still in progress) The main time consuming work were making the second track and all the under carriage elements. Not really worth posting as its just a replica of what i had already made and extremely boring ! What can be seen in the image above at the moment weighs in at 40 kg (88lbs) and with the ripper and blade/hydro pump etc should be about 50 - 55 kg in total. I may try and see if i can rig up a makeshift blade to see how the traction works. So going back to where i left off, i had some issues with making a right angle gearbox and initially when with this: https://i.postimg.cc/hGbnhrjc/7-DF7-...002700-B81.jpg The gear box, axle and drive train have taken a lot of working out and time as i could not really tell if i was on the right track ( not from an engineering background) and i was worried ( still am a little bit :) ) that the whole things might chew it self apart. after several trials with f |
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