Open Source Ecology - User contributions [en]

Talk:GrabCAD Backhoe Redesign for Fabrication

2013-10-30T16:26:02Z

Bastelmike: /* teeth */

== teeth ==

should we incorporate teeth into the bucket design? http://www.asbucketsteeth.com/ --[[User:Dorkmo|Dorkmo]] 06:26, 9 September 2012 (CEST)

--- general redesign for easier fabrication questionable ----
Why?

1. Use of square tube 4x4x1/2"
Is this commercially available? Doubtful. McMaster Carr supplies only 4x4 with maximum thickness of wall = 0.250"
Nearest metric equivalent to 4x4x1/2" would be 100x100x12 mm.
Did a quick search in catalogues/websites of leading German steel suppliers: 100x100 square tubes are only available with walls up to 8mm thick.

So what if you can't buy that stuff?

2. Strength of redesign
Obviously the crabcad design is stronger than this redesign, just because the crabcad's has much larger crossections there where highest forces occur. Equal cross sections everywhere means either too much material everywhere except a few high tension areas or too weak design that will fail soon !

3. Drilled holes
Bad idea to drill (unnecessary) holes in a part like this. Under high dynamic loads that are typical for an excavator, the boom will crack early at one of this points with an adjacent hole.

This redesign was wanted by Marcin; nevertheless this makes the backhoe unuseable and also impossible to build because You won't get Your hands on the raw materials.
{Bastelmike Oct 30, 2013}

Talk:Cold Saw/Build Instructions/Fabricability Review

2012-06-24T12:58:38Z

Bastelmike: s

I like the work from YK on the saw. Regarding drawings, I would like to add some comments:

Rendering with threads: [[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.jpg]]

And I did a drawing in accordance to metric ISO standards:
[[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.pdf]]

- in ISO tolerances aren't specified by the number of digits, thus 10 and 10.000 are identical in precision. Standard is to omitt trailing zeroes.

- metric standard threads are written as "M 12", not as "M 12x1.75". Latter designation is only used for metric fine threads, ie. M12x1

- its standard to apply a diameter sign only when its not visible as round. If the dimension is attached to a circle, no Ø is used.

- I am not happy with the method for dimensioning diameters. In my drawing its the standard method; YKs version is an exception.

- I confused about some dimensions in those drawings. Why are there values like 31.8 and 51.8 mm ? Why not 50.8mm (2") or round 50mm ?

- In the drawing header there are dimensions specified. This is not common in ISO. Also these tolerances are obviously nonsense. Don't think, YK wants us to drill a 12.700mm hole with a tolerance of +-0.005mm????

-drill bit size for M 12 is 10.2mm, not 10.5 . metric diameter minus thread = drill bit size

Bastelmike

Talk:Cold Saw/Build Instructions/Fabricability Review

2012-06-24T12:54:24Z

Bastelmike: Created page with "I like the work from YK on the saw. Regarding drawings, I would like to add some comments: Rendering with threads: [[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.jpg..."

I like the work from YK on the saw. Regarding drawings, I would like to add some comments:

Rendering with threads: [[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.jpg]]

And I did a drawing in accordance to metric ISO standards:
[[http://opensourceecology.org/wiki/File:ShaftCoupling_ISO.pdf]]

- in ISO tolerances aren't specified by the number of digits, thus 10 and 10.000 are identical in precision. Standard is to omitt trailing zeroes.
- metric standard threads are written as "M 12", not as "M 12x1.75". Latter designation is only used for metric fine threads, ie. M12x1
- its standard to apply a diameter sign only when its not visible as round. If the dimension is attached to a circle, no Ø is used.
- I am not happy with the method for dimensioning diameters. In my drawing its the standard method; YKs version is an exception.
- I confused about some dimensions in those drawings. Why are there values like 31.8 and 51.8 mm ? Why not 50.8mm (2") or round 50mm ?
- In the drawing header there are dimensions specified. This is not common in ISO. Also these tolerances are obviously nonsense. Don't think, YK wants us to drill a 12.700mm hole with a tolerance of +-0.005mm????

File:ShaftCoupling ISO.pdf

2012-06-24T12:39:57Z

Bastelmike:

File:ShaftCoupling ISO.jpg

2012-06-24T12:20:39Z

Bastelmike:

Talk:Germany/Wind Turbine

2012-03-25T19:43:30Z

Bastelmike: Created page with "Several issues withn small size VAWT haven't been mentioned yet: The power output per square meter wind farm may be higher for small VAWTs, but the disadvantage is, they use the..."

Several issues withn small size VAWT haven't been mentioned yet:

The power output per square meter wind farm may be higher for small VAWTs, but the disadvantage is, they use the area exclusively. With large HAWTs spaced 400ft apart, the area can be used for farming with a minimum area lost for wind power, VAWT spaced at 20 ft don't allow any use.

Higher weight per power (kg/kW) means also higher costs per kW as materials don't come for free.

In the OSE wiki I found some requirements for wind turbines:
<<<Low-cost - must cost less than $1 per installed watt and $0.05/kWh produced on a medium speed site (6m/s average speed [13.4mph, 21.6km/h])
>>>
I am very curious if its possible to achieve this goal with small turbines.

Bastelmike 25/03/2012

Talk:Industrial Robot/Research Development

2012-01-28T20:14:29Z

Bastelmike: Created page with "I have doubts about the data for repeatability. German "Dubbel: Taschenbuch für Maschinenbau" gives repeatability values between 0,1 and 1,0 mm depending on robot application. +..."

I have doubts about the data for repeatability. German "Dubbel: Taschenbuch für Maschinenbau" gives repeatability values between 0,1 and 1,0 mm depending on robot application.
+- 2 mm is too much for welding and most assembly tasks. It would be good enough for things like paint jobs.

Bastelmike 28.1.2012

Talk:Bulldozer/Research Development

2012-01-20T17:57:34Z

Bastelmike: Created page with "What about 4WD? Bulldozers are tracklaying vehicles! There are very few wheeled bulldozers around and they are usually only operated on firm ground. But if the bulldozer is trac..."

What about 4WD?
Bulldozers are tracklaying vehicles!
There are very few wheeled bulldozers around and they are usually only operated on firm ground.

But if the bulldozer is track-type, it's absolutely unnecessary to power more than one wheel per track. Recent discussion about hydro-motors prob working against each other shows, powering two wheels on each side is a potential reason for trouble.
Instead give it a well-designed tracklaying carriage.
Bastelmike 20.1.2012

Bulldozer/Research Development

2012-01-20T17:48:35Z

Bastelmike: /* Industry Standards */

{{GVCS Header}}
=Overview=
Research pertaining to the [[Bulldozer]].

=Industry Standards=
*Caterpillar D3 - 30,000 lb, 63 hp - drawbar power?
_______________________________________
Well designed bulldozers develop a tractive force of 80-90% of their weight under favorable soil conditions. Tractive force minus force needed for bulldozers rolling resistance gives drawbar pull.
Bastelmike 20.1.2012

=6 Way Blade Design=

=Motor Coupling=
*http://ustsubaki.com/pdf/brochures/L10794_coupling.pdf
This table indicates that 100-20 double roller chain coupling can accommodate 77,000+ inch pounds of force, or about 5000 pounds of force at a 15 inch diameter of a bulldozer wheel. This indicates 20,000 pounds of pushing force in 4 wheel drive configuration - as a scaling of the LifeTrac design strategy.
*See also [wikipedia on roller chain https://secure.wikimedia.org/wikipedia/en/wiki/Roller_chain]

=Research=

=See Also=
*[[Earth Moving]]

*[http://en.wikipedia.org/wiki/Bulldozer Wikipedia:Bulldozer]
*[http://www.madehow.com/Volume-3/Bulldozer.html How Things are Made: Bulldozer]
{{GVCS Footer}}

Talk:Requirements for LifeTrac Wheel Motors and Couplings

2011-12-10T14:28:27Z

Bastelmike:

I've framed the requirements as best I can.

Required actions:

*fill in the XXXs
*peer review (optional, but suggested)
*pass it to GrabCAD, to amend the competition.
__________________________________________________

Without knowing exact dimensions of all parts of all parts related and adjacent to this coupler, how can someone make a design?

Because FeF and other builders have no ability to manufacture internal splines, buying a spline hub off the shelf is unavoidable. There are 2 types usually available:
[[File:Coupler1.JPG]]
This coupler is usually attached to the wheel assembly with a shrink fit.

[[File:Coupler2.JPG]]
This coupler is connected to the wheel assembly by bolts and nuts.

Both designs require lathe work, #1 for the shrink fit and #2 for centrification.

I can't see a working design with the components and tools specified as allowable.

2011/12/10 Bastelmike

Talk:Requirements for LifeTrac Wheel Motors and Couplings

2011-12-10T14:25:40Z

Bastelmike:

I've framed the requirements as best I can.

Required actions:

*fill in the XXXs
*peer review (optional, but suggested)
*pass it to GrabCAD, to amend the competition.
__________________________________________________
Without knowing exact dimensions of all parts of all parts related and adjacent to this coupler, how can someone make a design?

Because FeF and other builders have no ability to manufacture internal splines, buying a spline hub off the shelf is unavoidable. There are 2 types usually available:
[[File:coupler1.jg]]
This coupler is usually attached to the wheel assembly with a shrink fit.

[[File:coupler2.jpg]]
This coupler is connected to the wheel assembly by bolts and nuts.

Both designs require lathe work, #1 for the shrink fit and #2 for centrification.

I can't see a working design with the components and tools specified as allowable.

2011/12/10 Bastelmike

Talk:Requirements for LifeTrac Wheel Motors and Couplings

2011-12-10T14:21:54Z

Bastelmike:

I've framed the requirements as best I can.

Required actions:

*fill in the XXXs
*peer review (optional, but suggested)
*pass it to GrabCAD, to amend the competition.
__________________________________________________
Without knowing exact dimensions of all parts of all parts related and adjacent to this coupler, how can someone make a design?

Because FeF and other builders have no ability to manufacture internal splines, buying a spline hub off the shelf is unavoidable. There are 2 types usually available:
[[File:coupler1.jpg]]
This coupler is usually attached to the wheel assembly with a shrink fit.

[[File:coupler2.jpg]]
This coupler is connected to the wheel assembly by bolts and nuts.

Both designs require lathe work, #1 for the shrink fit and #2 for centrification.

I can't see a working design with the components and tools specified as allowable.

2011/12/10 Bastelmike

File:Coupler2.JPG

2011-12-10T14:08:44Z

Bastelmike: coupler for connection with blts and nuts

coupler for connection with blts and nuts

File:Coupler1.JPG

2011-12-10T14:02:55Z

Bastelmike: Coupler for shrink fit connection

Coupler for shrink fit connection

Talk:Shonda Research

2011-10-04T18:33:58Z

Bastelmike: Created page with "Horizontal round bedways are considered a bad solution in quality machine tool design. Besides many other drawbacks they are subject to considerable bending by gravity, so they w..."

Horizontal round bedways are considered a bad solution in quality machine tool design. Besides many other drawbacks they are subject to considerable bending by gravity, so they work only for short bedways.
Just some calculations about this effect now:

In european DIN/ISO standards, there is a demand of straightness for bedways of lathes (other machines similar) with standard precision of 0.02mm for 1000mm bedway length, for improved precision this accounts to 0.01mm on 1000mm.

For a round steel bedway, 2.5ft long with diameter 2" bending by gravity is 0.010mm, or 0.0004"
This is without bending by weight from the carriage, with has to be added; all in all these bedways may fulfill the standard precision criteria for bedways (but not improved precision)

Longer bedways with round steel are nearly impossible, for 5ft length bending by gravity will be:
diameter 2": 0.152mm or 0.006"
diameter 3": 0.067mm or 0.0026"
diameter 4": 0.038mm or 0.0015"
diameter 6": 0.017mm or 0.0007"
diameter 8": 0.009mm or 0.0004", which is acceptable for standard precision machine tools
Bastelmike 2011/10/04

LT3 documentation TODOs

2011-09-15T16:04:03Z

Bastelmike:

1. Do a full exploded part diagram for the tractor, labeling each part with a number
2. Show a 2D technical drawing for each part, labeled by the number you used in the exploded part diagram.
Do a separate page for each part. On each page, we can then retrofit labels and other fabrication procedure information - though I don't know how Solidworks handles such labels.

If we start a numbering scheme, do it in a way that it is universal useable. Specify numbers in the format XXXX-NNNN, where XXXX is a 4-digit-code for the machine and NNNN is the individual part number in that design, eg. 0003-0001 is part #1 of the Lifetrac (Bastelmike).
These numbers could then be used general in GVCS for ordering spare parts, in fabrication....

Loader arm support beam angle iron

No hidden lines showing hole placement in views (result: the side with 3 holes could be made in two different orientations - but only one would work)

Wheel axle shaft holding plate

No vertical placement dimensions for large and medium size holes
Assume symmetrical placement of small holes?

Wheel hydraulic motor interface plate

I'm guessing the big hole is centered vertically on the plate? (ie: no dimension)

Loader Arm End-lump

Is this made from a solid 2" x 4.5" x 8" piece of steel?
Thanks for the info on the "notch", but it still provide any dimensions and is only visible in one view (ie: no hidden lines illustrating it in secondary view)

The one other thing that is missing is an overall diagram showing how all these pieces fit together.

Loader Arm Round, I'm pretty sure the tube wall should not be 1/2" thick steel.

Seems that some dimensions are mixing diameter and radius for the Wheel Mount Round.

The thickness is specified at 5/16", but the difference between the ID and OD is 5/8".

I revived the "Old" sheet of the BOM spreadsheet and am updating it with the new PDF drawings, but can't match the item names to those in the PDF drawing. In the spreadsheet, I put the old names in (parens) and put the new name in front. Can you check it and match up the outstanding names?

The spreadsheet is on the "Steel" sheet at the bottom of the spreadsheet:

http://opensourceecology.org/wiki/LifeTrac/Bill_of_Materials#Bill_Of_Materials

[[Category:Documentation Needs]]

Talk:Open Source Truck Concept

2011-09-07T06:30:17Z

Bastelmike:

Two points in the truck concept need probably rethinking

- wheelbase of the truck
for agricultural purposes there is a need to use a short wheelbase; for efficient handling in fieldwork and a short wheelbase provides more stability when lifting attached equipment. But with thus a short wheelbase the payload area needs to be very short,making efficient use in transportation impossible.
Also those Unimogs are available with different wheelbases; the short one for fieldwork and significantly longer wheelbases for transportation offroad

- hydraulic drive
vehicles like a Unimog have a very large speed range, 2-60mph
To provide the necessary torque at low speeds, the traction motors have to be very large to develop enough torque.
This design will be inefficient when operating at high speeds because the hydraulic motors would be operated on the road at very low pressure with a very low efficiency.
The use of a gearbox should be something to think seriously about

Bastelmike

Talk:Open Source Truck Concept

2011-09-06T16:42:25Z

Bastelmike: Created page with "Two points in the truck concept need probebly rethinking - wheelbase of the truck for agricultural purposes there is a need to use a short wheelbase; for efficient handling in f..."

Two points in the truck concept need probebly rethinking

- wheelbase of the truck
for agricultural purposes there is a need to use a short wheelbase; for efficient handling in fieldwork and a short wheelbase provides more stability when lifting attached equipment. But with thus a short wheelbase the payload are needs to be very short,making efficient use in transportation impossible.
Also those Unimogs are available with different wheelbases; the short one for fieldwork and significantly longer wheelbases for transportation offroad

- hydraulic drive
vehicles like a Unimog have a very large speed range, 2-60mph
To provide the necessary torque at low speeds, the traction motors have to be very large to develop enough torque.
This design will be inefficient when operating at high speeds because the hydraulic motors would be operated on the road at very low pressure with a very low efficiency.
The use of a gearbox should be something to think seriously about

Bastelmike

Steam Engine Reviews

2011-08-30T15:51:34Z

Bastelmike:

{{Category=Steam Engine}}

The following reviews, comments, and suggestions have been made:

* [[Steam Engine Reviews/Arrowhead Bump Valve Summary]]
* [[Steam Engine Reviews/Arrowhead Bump Valve]]
* [[Steam Engine Reviews/Piston Head Stress]]
* [[Steam Engine Design/Gregor]]

Additional information, comments, and suggestions can be found in:

* [[Steam Engine Correspondence]]

[[Category:Steam Engine]]
[[Category:Solar Turbine]]

Steam Engine Reviews/Piston Head Stress

2011-08-30T15:45:56Z

Bastelmike:

The following review is provided by Bastelmike

Stress Calculations 
OSE Steam engine 
Piston bolt 

calculation in metric for bending
piston force: F = A * p 
A = 3,75” * 3,75” * 0,785 = 11,04 sq.inch = 71,2 cm² = 7120 mm² 
p = 250 psi = 250 lbs / (25,4 * 25,4) = 0,387 lbs / mm² = 1,76 N / mm² 

--> F = 7120 mm² * 1,76 N/mm² = 12531 N

assumed loose fit of the bolt in both parts

Mmax = F * (l + 2 * s) / 8 = 12531 N * (0,3” + 2* 0,1”) / 8 
= 12531 N * 12,7 mm / 8 = 19893 Nmm

σ = M / W = M / 0,1 / d³ = 19893 / 0,1 / 6,35³ = 777 N / mm²

for mild steel St 37-2 allowable σ : 330 N/mm² STATIC 
for tempered high grade steel 30 CrNiMo 8 allowable σ: 1440 N / mm² STATIC 
only very high grade steel tempered will work, if just calculating static load

Dynamic calculation 
σzul = σD * b1 * b2 / βk / ν 
b1 : 0,88 for St 37-2 ( fine finished surface Ra 6,3) 
b1 : 0,72 for 30CrNiMo 8 
b2 : 1 (diameter below 10 mm) 
βk : 1,3 for St37-2; 1,4 for 30CrNiMo8 
ν : 1,5 average value 
σDSch = 290 N/mm² for St37-2; σDSch = 1070 N/mm² for 30CrNiMo8

--> for St37-2: σzul = 131 N/mm² 
--> for 30CrNiMo 8 σzul = 367 N/mm²

no steel will stand 777N/mm² longtime (fatigue)

Calculating area pressure 
Aproj = d * l = 6,35mm * 7,62mm = 48,4mm² in stem 
p = 12531N / 48,4mm² = 259 N/mm² in stem fit 
Aproj = d * s * 2 = 6,35 mm * 5,04mm = 32mm² rod connector 
p = 12531 / 32mm² = 392 N/mm² in fit to rod connector

tolerable pressure for non-sliding surfaces, mild steel, dynamic load: 75N/mm² 
tolerable pressure for non-sliding surfaces,high grade steel, dynamic load: 150N/mm²

tolerable pressure for sliding surfaces, mild steel on steel: none. high rate of wear !!! 
tolerable pressure for sliding surfaces, steel on bronze: 25 N/mm²

Both the stress through bending and the area pressure seem to be much over tolerable values.

Multimachine/Research Development/Working Concept

2011-08-27T20:19:53Z

Bastelmike: /* Bastelmike */

=[[Bastelmike]]=
Another concept for a mill. This bedmill has a high ability to replicate itself while kneemills don't have this. A kneemill hasn't enough longitudinal travel to machine the table or the longitudinal bedways of another knee mill. Also its rigidity to machine parts of another knee mill is doubtful.
A bedmill can easily manufacture its own bed in two parts, these two parts have to be assembled while setting up the mill. A bedway in several sections is standard with large milling machines.

Bedmills provide a stable base for CNC and don't have such an difficult design as the knee.

[[File:bed_mill3.jpg]]

=[[Dan Granett]]=

See also [[Multimachine_Concept_Dan_Granett]]
This is a concrete mill, where the head is attached to a top piece. Head can be rotated for horizontal or vertical milling.
[[Image:danmm.jpg|300px]]

=[[Eric MacNeil]] Version=

[[File:Base_multimachine_square_v3.jpg]]

*Head to motor connection. Spindle to be attached.

[[File:Head_multimachine_v1.jpg]]

For source, go to Open Pario Multimachine repository - [http://openpario.mime.oregonstate.edu/projects/mm]

Past revisions and progress flowchart located at: [http://opensourceecology.org/wiki/Multimachine_Concept]

=[[Jershonda Baker]] Spindle=

{{ToolTemplate|ToolName=Multimachine}}

[[Image:jershondaspindle.jpg|500px]][[File:YAxisTable.jpg]]
[[File:Spindle2Drawing.JPG]]

For source, go to Open Pario Multimachine repository - [http://openpario.mime.oregonstate.edu/projects/mm]

solidworks is working again I Will try to upload models of the spindle in the next couple days and designs for the slides as well. I have started making production drawings and writing steps for manufacturing each of the parts.

I'm having a few issues finding the manufacturing method for dovetail tapered gibbs. If anyone knows how they make them or where I can start looking, I have information on how to finish scrape it but the geometry i cant figure out.

bearings for spindle

33012/Q 60mm by 95mm by 27mm tapered roller bearings 2X ~100$ each

spindle pipe

2 ½” XXHY pipe 18”? 2.375 nom O.D. ~30$

3 ½” sch 80 pipe 12”? ~30$

2 x 1 ½ x 12” steel flat bar ~20$

pipe XXHY for nut on end of spindle

v-belt pulley

spacer/seat for rear seal (could be v-belt pulley)

seals 70mm by 95mm by 12mm (seats on pulley or spacer)

seal seat for front of spindle

part sources

SKF for bearings and seals but equivalent avalible from most major bearing companies (price check through mcmaster.com or internet)

west marine for resin epoxy system (523.98 for 5.29 gallons, mixed with 85% aggregate yields 35.25 gallons of E/G concrete, 4.715 cubic feet

landscaping supply for aggregate (I bought river stone 3/8in size for $4 for a five gallon bucket or some such, $6-7 per cubic foot, and play sand can be bought for ~$6 per cubic foot)

steel prices based off of discount steel (http://discountsteel.com/)

books / resources

workshop practices book series

compilation of E/G thread from practical machinist ([http://f1.grp.yahoofs.com/v1/8JoITknEKdES37FnkaCf_X9hv_H-K5irgljfRfV6x4UIWnYN6K-S05_087MG0ov2eS0iQwzhl_3nCrCauVOqTO3EX2pNK2yYslBe1E3iU-q0/Poly%20Concrete%20Uses%20in%20Machine%20Construction/EPOXY%20GRANITE%20-%20Tips%20%26%20Tricks%20posts%201-365.pdf link Tips and Tricks for castig]) (you may have to be logged in as a member of the group to look at the file, I'll ask if i can copy the file onto our wiki)

machine tool reconditioning by Edward Connelly

sites

http://groups.yahoo.com/group/multimachine/

http://finance.groups.yahoo.com/group/Multimachine-Concrete-Machine-Tools/

http://www.cnccookbook.com/ (work with E/G http://www.cnccookbook.com/CCMillEpoxyFill.htm)

Proposed SubProjects

Spindle (eventually to incorporate hydrostatic bearings if feasible)

dovetail ways (ridged ways for heavy machining)

round ways( cylindrical ground for any length ways)

hydrostatic bearings (using replication techniques and epoxy granite)

anti-backlash nut for ACME thread (design on multimachine yahoo group)

[[Category: Multimachine]]

File:Bed mill3.jpg

2011-08-27T20:14:10Z

Bastelmike:

File:Bed mill2.JPG

2011-08-27T20:06:19Z

Bastelmike: uploaded a new version of "File:Bed mill2.JPG"

File:Bed mill2.JPG

2011-08-27T20:03:07Z

Bastelmike: uploaded a new version of "File:Bed mill2.JPG"

File:Bed mill2.JPG

2011-08-27T19:55:44Z

Bastelmike: uploaded a new version of "File:Bed mill2.JPG"

File:Bed mill2.JPG

2011-08-27T19:52:42Z

Bastelmike: uploaded a new version of "File:Bed mill2.JPG"

File:Bed mill2.jpg

2011-08-26T19:34:25Z

Bastelmike:

Multimachine/Research Development/Working Concept

2011-08-26T19:30:37Z

Bastelmike:

=[[Bastelmike]]=
Another concept for a mill. This bedmill has a high ability to replicate itself while kneemills don't have this. A kneemill hasn't enough longitudinal travel to machine the table or the longitudinal bedways of another knee mill. Also its rigidity to machine parts of another knee mill is doubtful.
A bedmill can easily manufacture its own bed in two parts, these two parts have to be assembled while setting up the mill. A bedway in several sections is standard with large milling machines.

Bedmills provide a stable base for CNC and don't have such an difficult design as the knee.

[[File:bed_mill2.jpg]]

=[[Dan Granett]]=

See also [[Multimachine_Concept_Dan_Granett]]
This is a concrete mill, where the head is attached to a top piece. Head can be rotated for horizontal or vertical milling.
[[Image:danmm.jpg|300px]]

=[[Eric MacNeil]] Version=

[[File:Base_multimachine_square_v3.jpg]]

*Head to motor connection. Spindle to be attached.

[[File:Head_multimachine_v1.jpg]]

For source, go to Open Pario Multimachine repository - [http://openpario.mime.oregonstate.edu/projects/mm]

Past revisions and progress flowchart located at: [http://opensourceecology.org/wiki/Multimachine_Concept]

=[[Jershonda Baker]] Spindle=

{{ToolTemplate|ToolName=Multimachine}}

[[Image:jershondaspindle.jpg|500px]][[File:YAxisTable.jpg]]
[[File:Spindle2Drawing.JPG]]

For source, go to Open Pario Multimachine repository - [http://openpario.mime.oregonstate.edu/projects/mm]

solidworks is working again I Will try to upload models of the spindle in the next couple days and designs for the slides as well. I have started making production drawings and writing steps for manufacturing each of the parts.

I'm having a few issues finding the manufacturing method for dovetail tapered gibbs. If anyone knows how they make them or where I can start looking, I have information on how to finish scrape it but the geometry i cant figure out.

bearings for spindle

33012/Q 60mm by 95mm by 27mm tapered roller bearings 2X ~100$ each

spindle pipe

2 ½” XXHY pipe 18”? 2.375 nom O.D. ~30$

3 ½” sch 80 pipe 12”? ~30$

2 x 1 ½ x 12” steel flat bar ~20$

pipe XXHY for nut on end of spindle

v-belt pulley

spacer/seat for rear seal (could be v-belt pulley)

seals 70mm by 95mm by 12mm (seats on pulley or spacer)

seal seat for front of spindle

part sources

SKF for bearings and seals but equivalent avalible from most major bearing companies (price check through mcmaster.com or internet)

west marine for resin epoxy system (523.98 for 5.29 gallons, mixed with 85% aggregate yields 35.25 gallons of E/G concrete, 4.715 cubic feet

landscaping supply for aggregate (I bought river stone 3/8in size for $4 for a five gallon bucket or some such, $6-7 per cubic foot, and play sand can be bought for ~$6 per cubic foot)

steel prices based off of discount steel (http://discountsteel.com/)

books / resources

workshop practices book series

compilation of E/G thread from practical machinist ([http://f1.grp.yahoofs.com/v1/8JoITknEKdES37FnkaCf_X9hv_H-K5irgljfRfV6x4UIWnYN6K-S05_087MG0ov2eS0iQwzhl_3nCrCauVOqTO3EX2pNK2yYslBe1E3iU-q0/Poly%20Concrete%20Uses%20in%20Machine%20Construction/EPOXY%20GRANITE%20-%20Tips%20%26%20Tricks%20posts%201-365.pdf link Tips and Tricks for castig]) (you may have to be logged in as a member of the group to look at the file, I'll ask if i can copy the file onto our wiki)

machine tool reconditioning by Edward Connelly

sites

http://groups.yahoo.com/group/multimachine/

http://finance.groups.yahoo.com/group/Multimachine-Concrete-Machine-Tools/

http://www.cnccookbook.com/ (work with E/G http://www.cnccookbook.com/CCMillEpoxyFill.htm)

Proposed SubProjects

Spindle (eventually to incorporate hydrostatic bearings if feasible)

dovetail ways (ridged ways for heavy machining)

round ways( cylindrical ground for any length ways)

hydrostatic bearings (using replication techniques and epoxy granite)

anti-backlash nut for ACME thread (design on multimachine yahoo group)

[[Category: Multimachine]]

File:Bed mill2.JPG

2011-08-26T19:18:57Z

Bastelmike: uploaded a new version of "File:Bed mill2.JPG"

File:Bed mill2.JPG

2011-08-26T18:56:04Z

Bastelmike:

File:Bed mill1.JPG

2011-08-26T18:52:16Z

Bastelmike: