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  #1  
Old Wed 16 September 2009, 02:14
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Very interesting alu. table #68 - Kirov, Russia

Greetings to all builders of MM.

Separate many thanks to Gerald for its magnificent idea.

I Dmitriy from Russia. I too have decided to construct the MM.

All has begun in the end of the last year when I have come across this site. I long read, looked, studied... Has then solved - I will build.

My MM is not finished yet, a photo and explanatories I will gradually spread. I think, there is no sense to tell all as I has welded or painted details - with it any more will not surprise builders of MM. I wish to show some my non-standard ways which, I hope, own decisions in MM building will help other builders to make.
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  #2  
Old Wed 16 September 2009, 02:28
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
April 2009. It is the first step on a way of construction of my MM. I have decided to buy only 8 pieces of V-bearings. On axis Z linear bearings will be established.
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File Type: jpg IMG_3854.jpg (77.5 KB, 3136 views)
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  #3  
Old Wed 16 September 2009, 02:37
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
July 2009. Test of manufacturing a rail... The result has not pleased.
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File Type: jpg IMG_3938.jpg (35.5 KB, 3109 views)
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  #4  
Old Wed 16 September 2009, 02:44
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
July 2009. New attempt - it is similar to the truth... Has started to build axis Y.
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File Type: jpg IMG_4014.jpg (24.2 KB, 3088 views)
File Type: jpg IMG_4007.jpg (48.5 KB, 3110 views)
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  #5  
Old Wed 16 September 2009, 02:54
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
July 2009. New experiments with manufacturing a rail.
Attached Images
File Type: jpg cut&grind-skateboard1.jpg (74.0 KB, 3132 views)
File Type: jpg cut&grind-skateboard2.jpg (55.9 KB, 3113 views)
File Type: jpg cut&grind-skateboard3.jpg (54.7 KB, 3100 views)
File Type: jpg cut&grind-skateboard4.jpg (41.5 KB, 3096 views)
File Type: jpg cut&grind-skateboard5.jpg (40.0 KB, 3075 views)
File Type: jpg cut&grind-skateboard6.jpg (53.3 KB, 3064 views)
File Type: jpg cut&grind-skateboard7.jpg (44.9 KB, 3050 views)
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  #6  
Old Wed 16 September 2009, 03:12
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
September 2009. Has begun partial assemblage of brains MM. For cooling G203V has made decision to use fans from the computer. Model of fans AMD Socket 754, 939, 940, AM2, F (Igloo 7223 series). A red wire +12V, black wire GRD. The yellow wire has removed.

I plan to do the fourth axis, therefore has left a place for the fifth G203V.
By the way recently I have received it
Attached Images
File Type: jpg IMG_4180.jpg (47.1 KB, 3043 views)
File Type: jpg IMG_4182.jpg (42.9 KB, 3049 views)
File Type: jpg IMG_4190.jpg (35.4 KB, 3027 views)
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  #7  
Old Wed 16 September 2009, 03:24
javeria
Just call me: Irfan #33
 
Bangalore
India
Think there will be no need of the fans, try first without running the fans.
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  #8  
Old Wed 16 September 2009, 04:03
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
September 2009. Has begun assemblage belt-drive.
Many thanks to Gerald for the help with step-motors. After long searches and reflexions I have decided to go the checked up road, but have a little changed a traditional design of the mechanism of a reducer.
Reducer classical 3:1 (pulleys LS27T5/20-2, LS27T5/60-0, a belt 16T5/355). Has more low loaded drawings in dxf. It is not accurate a little - forgive, I only have started to study AutoCAD.
Attached Images
File Type: jpg IMG_4211.jpg (36.5 KB, 3028 views)
File Type: jpg IMG_4218.jpg (17.7 KB, 2999 views)
File Type: jpg IMG_4221.jpg (18.0 KB, 2999 views)
File Type: jpg IMG_4226.jpg (20.9 KB, 2982 views)
File Type: jpg IMG_4227.jpg (17.5 KB, 2980 views)
File Type: jpg IMG_4229.jpg (17.3 KB, 2963 views)
File Type: jpg IMG_4230.jpg (16.9 KB, 2974 views)
File Type: jpg IMG_4233.jpg (21.7 KB, 2972 views)
Attached Files
File Type: dxf Obuhus-BeltDrive.dxf (328.2 KB, 320 views)
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  #9  
Old Wed 16 September 2009, 04:09
sailfl
Just call me: Nils #12
 
Winter Park, FL
United States of America
Dmitiry,

Looks like you have a great start and Welcome to the site.

Though it may seem like you need to have lots of fans to combat the heat, the one fan works find. I agree with Irfan.

Your rails and belt drives look great. Keep taking pictures, we like to see what others are doing.
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  #10  
Old Wed 16 September 2009, 04:12
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Quote:
Originally Posted by javeria View Post
Think there will be no need of the fans, try first without running the fans.
I plan to combine control-box and the computer in one case. The current of windings of motors 4А - is to that to heat up.

And in general I like all to do thoroughly
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  #11  
Old Wed 16 September 2009, 05:14
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Great pictures, great thinking, great progress! Thanks!
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  #12  
Old Wed 16 September 2009, 05:22
javeria
Just call me: Irfan #33
 
Bangalore
India
I love your reduction drive - good thought given to it.
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  #13  
Old Wed 16 September 2009, 05:38
kaartman
Just call me: Koning #20
 
Abu Dhabi
United Arab Emirates
Welcome Dmitriy
Great pictures, love to see more in future
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  #14  
Old Wed 16 September 2009, 06:17
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
Send a message via Yahoo to Robert M Send a message via Skype™ to Robert M
Hi Dmitriy, welcome aboard and as a new builder myself, IТm wishing you all the best and a smooth build with your project. When are you hopping to finish it, you seem well advanced ? Amicalement, Robert
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  #15  
Old Wed 16 September 2009, 07:43
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Greetings to all! Thanks for kind words. To finish building I plan about New year. Time has not enough - the basic business demands attention.
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  #16  
Old Wed 16 September 2009, 09:35
Doug_Ford
Just call me: Doug #3
 
Conway (Arkansas)
United States of America
Dmitriy,

Whether or not you need all of those fans and heat sinks, it looks REALLY sharp. Kind of like a big V8 engine under the hood of a small car. I like it. Good luck with everything.
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  #17  
Old Wed 16 September 2009, 09:41
javeria
Just call me: Irfan #33
 
Bangalore
India
G' I think seriously we should standardize this design for the reduction mechanism. Its metal laser cut welded and no bends reqd and can order a special shaft and pinion combined. Also we can avoid all nut's by tapping the motor plate by making it 6mm thk, that way we can use screw of upto M6.

ok nuts are reqd to adjust the belt tension a bit

Last edited by javeria; Wed 16 September 2009 at 09:44.. Reason: nuts are reqd
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  #18  
Old Wed 16 September 2009, 10:25
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Dmitriy's design seems to have all the bearings (or one wide bearing) on the outboard side of the reduction unit.
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  #19  
Old Wed 16 September 2009, 10:40
javeria
Just call me: Irfan #33
 
Bangalore
India
yes thats what I like too - hmmm is that wrong, ???? I feel it would be ok - I think one more of our forum member has done this already.
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  #20  
Old Wed 16 September 2009, 13:17
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Quote:
Originally Posted by Gerald D View Post
Dmitriy's design seems to have all the bearings (or one wide bearing) on the outboard side of the reduction unit.
Gerald, you are confused with length of a shaft from the bearing to a gear wheel? In my case the shaft is made of stainless steel. For a usual steel there is more reliable configuration, but more bulky.

Last edited by obuhus; Wed 16 September 2009 at 13:39..
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  #21  
Old Wed 16 September 2009, 13:55
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
I am a little bit worried about the flexibility of the shaft. It is quite a long distance from the bearing to the pinion gear. There is no real difference in the flexibility of stainless steel compared to usual steel - the vibration frequency will be the same. It will be interesting to see if you get good cutting results.
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  #22  
Old Wed 16 September 2009, 14:26
bradm
Just call me: Brad #10
 
Somerville(MA)
United States of America
Would something like a simple sintered bronze sleeve in the opening by the pinion gear help or hurt?
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  #23  
Old Wed 16 September 2009, 14:41
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Quote:
Originally Posted by Gerald D View Post
I am a little bit worried about the flexibility of the shaft. It is quite a long distance from the bearing to the pinion gear. There is no real difference in the flexibility of stainless steel compared to usual steel - the vibration frequency will be the same. It will be interesting to see if you get good cutting results.

Gerald, I thought of it. For myself I have chosen a variant with stainless steel - there was at hand suitable preparation. And design more graceful. But the second variant obviously is stronger. And quality of processing we will see when will earn
Attached Images
File Type: jpg SS&US-belt-drive1.jpg (21.7 KB, 2942 views)
File Type: jpg SS&US-belt-drive2.jpg (26.7 KB, 3020 views)

Last edited by obuhus; Wed 16 September 2009 at 14:47..
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  #24  
Old Wed 16 September 2009, 23:41
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Quote:
Originally Posted by bradm View Post
Would something like a simple sintered bronze sleeve in the opening by the pinion gear help or hurt?
It would remove the concern about flexing. But then that bronze sleeve becomes the most heavily loaded bearing in the system and needs to be upgraded for long life. Which puts you back to having a standard bearing there in the first place.
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  #25  
Old Thu 17 September 2009, 01:44
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
It seems to me, I have thought up an absolute variant of a reducer. It has a possibility to protect a belt and pulleys from a dust. In drawing I have designated a cover a blue line.
Attached Images
File Type: jpg SS&US-belt-drive3.jpg (32.5 KB, 2931 views)
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  #26  
Old Thu 17 September 2009, 02:10
javeria
Just call me: Irfan #33
 
Bangalore
India
that is a good design - but for motors with different height it might be problem. so need to decide what depth it will be.
may be that can be left as a motor dependent variable.

also since the plate is laser cut on the pinion side a flange and bolt arrangement might not be necessary on the shaft case, we can just have the casing of the shaft match with the hole in the plate and make it go thru.

RGDS
Irfan
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  #27  
Old Sat 05 December 2009, 10:40
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
Greetings to all builders of MM!
Time on former catastrophically does not suffice.
But there is a small progress.
Attached Images
File Type: jpg control-box1.jpg (22.2 KB, 2756 views)
File Type: jpg control-box2.jpg (50.1 KB, 2758 views)
File Type: jpg control-box3.jpg (89.2 KB, 2779 views)
File Type: jpg control-box4.jpg (41.5 KB, 2755 views)
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  #28  
Old Sat 05 December 2009, 10:48
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
And here it is new design of mine cut&grind-skateboard. It is similar to the monster, the truth?
Attached Images
File Type: jpg cut&grind-skateboard8.jpg (61.1 KB, 2755 views)
File Type: jpg cut&grind-skateboard9.jpg (67.8 KB, 2751 views)
File Type: jpg cut&grind-skateboard10.jpg (59.9 KB, 2751 views)
File Type: jpg cut&grind-skateboard11.jpg (50.2 KB, 2738 views)
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  #29  
Old Sat 05 December 2009, 10:58
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
And you know, this piece works! And with good results! The rail has identical height on all its length.
Attached Images
File Type: jpg IMG_4399.jpg (36.7 KB, 2740 views)
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  #30  
Old Sat 05 December 2009, 11:10
obuhus
Just call me: Dmitriy #68
 
Kirov region
Russia
This scheme explains a mode of functioning of my design.
Attached Images
File Type: gif cut&grind-skateboard1.gif (6.0 KB, 2726 views)
File Type: gif cut&grind-skateboard2.gif (8.7 KB, 2724 views)
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