Guess exactly this will happen, Gregor! They won't finish the GVCS in 2013 and what they have "finished" will prob need much redesigning. What we see today in the wiki is poor mechanical engineering, and this is a gentle designation for some design details.
gregor:
Another good apparent example of lack of information that people need to do their jobs, is why Howard has to go all the way over to rural Missouri to get some dimensions coralled up. That makes no sense whatsoever. How can you make something as complex as these tools without having the dimensions written down already? Then just send the raw files to people to go through and produce documentation from. Don't tell me they are flying by the seat of their pants so much they don't even write down their designs
DavidIAm wrote:
Why is this modularity a bad goal for an open source system of power equipment?Why is this modularity a bad goal for an open source system of power equipment?
That are two long posts from, I'll try to answer some points in different posts.
Modularity isn't bad, in fact its a good idea, but with disadvantages and limitations. Cost for manufacturing these designs might be a bit higher, with prospects for future savings. Efficiency is often lower.
But the real problem is, modularity isn't really scalable. A larger more powerful power cube isn't easily compatible with the current one; its dimensions will differ, hoses and couplers will have different (larger) sizes.
And it won't be an easy quick attach! You cannot carry a 200hp power cube. You will need a crane to lift, transport and reinstall it. David, do You think a farmer is willing and able to move his 200hp-power-cube several times a week, from combine to tractor to truck?
So what is the benefit from modularity for him?
Mike
OSEVergleich2-1.jpg | 155K |
Sorry for the delay, I had some trouble with the uploads
Here are the other views to compare
Vergleich_komplett.zip | 687K | |
OSEVergleich1-1.jpg | 162K |
@DavidIAm
Yes, the layout is different, just to show that you have much more flexibility in a shop without interior colomns. But those two shops have exactly the same equipment in them and their dimensions are equal.
Please tell me, David, how you want to install larger machine tools as I have used in those drawings in Your shop if the need arises?
And how Do You plan to move heavy parts in your shop? You don't have enough space to operate a larger forklift in it, and building 3 overhead cranes is expensive.
I already posted earlier how to construct a shop, with "open source plans". There are a lot of DIY plans available in the web for agricultural buildings. The specifications for a large farm machinery storage and a shop don't differ that much. Just google for "Canada plan service" or "midwest plan service". You will find detailed designs for buildings, designs that have been static calculated. I am not sure that has thoroughly been done for your shop. If You don't find what You need, just PM me, I will send You appropriate plans.
A dimensional sawmill is part of the GVCS, so why not use woodfor such a building. Wood or steel are bettr suited to that type of buildings and nearly noone builds them today with masonry. Maybe You could ask Brianna about the differences of wood/steel and brick poles to withstand horizontal forces like wind
You have criticized me for not having commented earlier on the design. But I am only involved with GVCS since 6 weeks, and regarding the way information about OSE is organized, or better widespread, its for noone possible to review all documents in that time. But after reviewing that shop design, I had to do several comments. I believe after a study on mechanical engineering - manufacturing technology, I can make some qualified comments on a shop layout. Sorry David, but a design doesn't work better if no one dares to criticize it.
Mike
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DavidIAm: I plan on moving heavy parts on casters, on my smooth concrete floor that I have advocated for. We really did think about making a crane, but we don't have steel pillars, masonry pillars are *not* a safe thing to put a bridge crane's rails on. Further, to have people moving things around with a crane is actually quite dangerous - keeping objects close to the floor seems a much saner, safer, method of moving them around. So how to move heavy things? Jacks and casters. And this is from some consultation with designers of factories.
Uhh, no crane!!!! Think again please, David!
For the GVCS set You have to manufacture real heavy parts. Bulldozer, steel roller, forge press.....
I have a selfbuilt crane in my homeshop. Usually my parts are not so heavy, but just lifting the lathe's large faceplate, the vertical milling head attachment or the round table needs one! If You can't build an overhead crane, use a forklift or a movable portal crane. Yes, those columns are a drawback then, but thats prob Your own design, David.
I don't believe You will ever get a steel rollers roll between the centers of such a heavy lathe without crane !
Mike
DavidIAm wrote
That makes it sound like you'd throw your hands up and say without the funding there isn't any point in even trying. (with that attitude, we wouldn't have gotten where we are) Its open source - I doubt these designs will survive unaltered by *us* much less other people who are going to produce them in the future. At least they have somewhere to start, there is *a* design, even if its not the best in the world. A tractor that you can both create AND gets some work done is better than pushing it all manually yourself, even if its not the best design out there. Cost and producability are *very large* components of a GCVS design - not perfection for a particular purpose.
The lifetrac is kind of like humans that way - we're not particularly good at anything in particular - but we can adapt ourselves adequately to just about everything.
If You don't have the basic equipment to build machines you will fail. Leonardo da Vinci designed excellent machines for his time being, but none of them was built because the technology, the tools to produce them didn't exist.
If OSE/FeF cant acquire good and sufficiently large (used) machine tools like lathes, mills, grinders, gear machines it won't be a success story.
Yes, I see and acknowledge that You already have done some projects. But,if You are honest, it were the easy ones? Those who required neither complicated designs nor high precision. All those components were bought off the shelf (engines, motors, pumps, couplers).
And the one that needed a complicated design, the tractor, is a complete failure! Nearly everything a farm tractor should have and be able to do is missing from lifetrac3. The Lifetrac2 broke in two when playing with a backhoe, without really doing excavation work.
Because FeF wasn't able to make a working articulated link, they "forgot" to build any steering in Lifetrac3 :-))
Look at the videos Lifetrac3 making a 90° turn on the the road - with some reversing... It's no design to improve but to forget about at once
Mike
Towards 50 GVCS Tools by 2013...... ?
Is that still realistic? About 45 machines still have to be done, with 3 prototypes each accounts for 135 prototypes in 110 weeks. 1.25 prototypes each week !
The current manufacturing rate at FeF is a magnitude lower. And everyone at FeF busy with construction of Hablab and shop, with difficulties in construction and deficiencies in quality. (-> DavidIam and Harold_V)
With that given situation, I believe now gregors statement is very realistic:
Whatever, if they want to be that arrogant they can wallow in it. It will take years and years to complete the GVCS and when it is done it will suck because there will simply be very little knowledge and experience behind it.
So, who still hopes for 50 GVCS in 2013 ?
Mike
people in Russia say hope dies last
@dorkmo
Yes, with parallel development it could be possible. Using alll the expertise from volunteers on the web. And with an well equipped and staffed production shop for realization
But from current FeF strategy I don't expect much until 2013.
Mike
@Dawg
You are prob right, if You think it's not possible to convince those "happy folks". But maybe its worth some trying if it doesn't cost you more than a bit of your time
I like the basic idea of open source hardware like the GVCS. I would regret that idea demolished by mismanagement.
But, as mjn wrote, realize it independently is impossible. First you need a machine factory to do that. Something FeF ignored and came to no results that way. Second, to realize the GVCS 50 needs 30,000 or 50,000 man hours - more than the rest of my work life. So a one-man-show is no alternative either.
OSE had already build up the needed infrastructure to do it. It was known on the web. It had already acquired some funding, not enough, but more than a start already had been achived. And with FeF they had got a place to realize it.
It's really bad that OSE top management has not been able to get a medium-level management to realize it. Perhaps it was always was to tempting for Marcin to overrule his mid-level managers until noone competent left.
Remains just personally for me the question, where are other bether managed open source hardware projects ??? Suggestions by PM welcome....
Mike
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