Difference between revisions of "Talk:Cosi measure new"

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== Part number 5.2.5 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 20:50, 8. Mai 2020 (CEST) ==
== -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 13:27, 21 September 2020 (CEST) ==


Test
- Software installation instructions couldn't be loaded from OHO's page ("Failed to load PDF document.")


== Part number 1 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:16, 15. Mai 2020 (CEST) ==
- License is CERN OHL **v1.2**


Is there an assembly instruction/drawing somewhere?
- [source files](https://github.com/opensourceimaging/cosi-measure/tree/master/Mechanical%20System/Complete%20System) for mechanical assembly (complete system) are missing


== Part number 1.5 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:24, 15. Mai 2020 (CEST) ==
- [manufacturing instructions](https://github.com/opensourceimaging/cosi-measure/blob/master/Mechanical%20System/2019-01-11_cosi-measure_v1.0_mechanical_assembly_instructions.pdf) are missing → those are important to understand the mechanical assembly of the complete system as there're just Fusion360 files and PNG exports available


part number is a duplicate
- bottom line in mechanical drawings is a little misleading :) → "This drawing is our property; it can't be reproduced or communicated without our written consent." → I'm seeing the CERN OHL v1.2 as such a written consent :)


== Part number 1.7 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:27, 15. Mai 2020 (CEST) ==
== Part number 1.6 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 13:37, 21 September 2020 (CEST) ==


BTW super obsolete screw standard :)
please add dimensions
The current one is DIN EN ISO 10642 (2020-02-00)


== Part number 1.10 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:34, 15. Mai 2020 (CEST) ==
===Re: Part number 1.6 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 13:50, 21 September 2020 (CEST)===


BTW super obsolete screw standard :) The current one is DIN EN ISO 4762 (2004-06-00)
: Well, my assumption is that this is not an individual component for the mechanical assembly, but rather the material for self-designed components (aluminium plates). Hence bill of material and 'shopping list' are mixed. Nothing dramatic; for best practice I'd suggest to have


== Part number 1.16 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:38, 15. Mai 2020 (CEST) ==
1. a neat bill of materials


nominal length missing
2. an optional, separate shopping list


== Part number 1.17 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:39, 15. Mai 2020 (CEST) ==
As said, nothing crucial. The relevant information is here.


BTW super obsolete screw standard :) The current one is DIN EN ISO 4762 (2004-06-00)
== Part number 1.25 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 13:40, 21 September 2020 (CEST) ==


== Part number 1.18 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:45, 15. Mai 2020 (CEST) ==
"hexagon nut", not "screw nut" :)


BTW super obsolete screw standard :) The current one is DIN EN ISO 10642
== Part number 1.16 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 13:55, 21 September 2020 (CEST) ==


== Part number 1.19 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:46, 15. Mai 2020 (CEST) ==
length is missing


BTW super obsolete screw standard :) The current one is DIN EN ISO 4762 (2004-06-00)
== Part number 2.2 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 14:01, 21 September 2020 (CEST) ==


== Part number 1.20 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:47, 15. Mai 2020 (CEST) ==
- '''Diameter''' for the 3rd hole (from the bottom left) is not specified. I assume it's also 5.5mm and needs a countersink


BTW super obsolete screw standard :) The current one is DIN EN ISO 10642
== Part number 2.3 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 14:07, 21 September 2020 (CEST) ==


== Part number 1.21 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:50, 15. Mai 2020 (CEST) ==
- I assume the ø16mm circles are the countersinks :)


BTW super obsolete screw standard :) The current one is DIN EN ISO 4032 (2013-04-00)
== Part number 2.5 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 14:23, 21 September 2020 (CEST) ==


== Part number 1.23 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:51, 15. Mai 2020 (CEST) ==
- really no countersink for the ø6mm holes this time?


not a standard part
- diameter specification of holes is a little ambiguous, but one can guess from the drawing → shouldn't be a problem


== Part number 1.24 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:52, 15. Mai 2020 (CEST) ==
== Part number 2.8 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 14:35, 21 September 2020 (CEST) ==


BTW super obsolete screw standard :) The current one is DIN EN ISO 4762 (2004-06-00)
- remove the second half of the note "Alternatively you can also make through hole …" → given that I bought the screws from the BoM, I'd rather make some threads :) (also: this note could be applied anywhere; unambiguous designs are better; skilled people may come up with personal deviations and forks themselves)


== Part number 1.25 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:53, 15. Mai 2020 (CEST) ==
== Part number 1 -- [[User:Martin|Martin]] ([[User talk:Martin|talk]]) 14:47, 21 September 2020 (CEST) ==


that's a standard part :)
as mentioned in the `general review`, assembly drawing/instruction is missing


== Part number 1.25 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 18:54, 15. Mai 2020 (CEST) ==
== Part number 2.1 -- [[User:Pomelo|Pomelo]] ([[User talk:Pomelo|talk]]) 21:33, 3 October 2020 (CEST) ==


BTW super obsolete screw standard :) The current one is DIN EN ISO 4032 (2013-04-00)
- The material for the plate is not specified, neither on the drawing nor in the table with the parts list (it is only mentioned in the assembly instructions in github)<br>
- There are missing holes (8x?) and respective threads (M5?) on both ends of the drawn plate where plate 2? is meant to be attached (as observed in github)<br>
- The dimension for the countersunk holes for the M6 screws is not clearly specified (or not specified) and the screws that belong in those holes are not identified with a position number on the parts list.<br>
- It would be nice to see a drawing with a better distribution of the measurements to make it easier to read. Some suggestions: The holes should be represented by empty circles. The threads should be drawn around the holes. The part has a transversal symmetry that allows a reduccion of the number of written measurements. Modify the scale of the drawing to better fit the page or cut the part to allow for extra space on both ends.


== Part number 2.1 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:10, 15. Mai 2020 (CEST) ==
== Part number 2.2 -- [[User:Pomelo|Pomelo]] ([[User talk:Pomelo|talk]]) 21:55, 3 October 2020 (CEST) ==


approved from my perspective; just some comments:


* avoid "chain dimensioning" and refer to and a reference point/edge so measure tolerances don't add up when making these holes
Suggestions<br>
* hole positions are a little confusing :)
- This part is symmetric. This can be use to declutter the drawing from redundant measurements and make it more readable.<br>
* no tolerance class defined (I suggest "m" according to DIN ISO 2768-1), but also not crucial for this piece of hardware
- Not all holes diameters need to be there, specially if they are all equal. Add one measurement and make a note on the drawing to clarify.<br>
- What is the optional countersink for? No need to specify diameter.


== Part number 2.2 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:18, 15. Mai 2020 (CEST) ==
== Part number 2.3 -- [[User:Pomelo|Pomelo]] ([[User talk:Pomelo|talk]]) 19:59, 12 October 2020 (CEST) ==


approved from my perspective; just some comments:
I am familiar with the complications of Free CAD in general and technical drawings are also a complex matter. It would be nice nevertheless to see a bit of consistency across the drawings when placing the measurements. Sometimes an isometric view in a corner of the drawing could help to give a better idea of how the part looks in 3D. Transparent/wire views also help to uncover some hidden features in simple parts.
 
* dividing line between both rectangle parts makes no sense
* a note that all holes are ø5,5mm would be sufficient (BTW one in the lower row of holes is technically not defined :) )
* cross out "optional", technical drawings are there to create exact replicates of a thing (within the defined tolerances)
* no tolerance class defined (I suggest "m" according to DIN ISO 2768-1), but also not crucial for this piece of hardware
 
== Part number 2.3 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:24, 15. Mai 2020 (CEST) ==
 
Approved from my perspective, but please clarify, that these ø16mm circles missing are the the countersinks (which weren't defined in 2.1 or 2.2)
 
& define what kind of countersink you mean (I assume 16x90°)
 
--
 
Nice tutorial for referencing holes/threads etc. (after US standards): https://www.webpages.uidaho.edu/mindworks/Solidworks/Topic%20References/DrawingGuidelines.pdf
 
== Part number 2.5 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:31, 15. Mai 2020 (CEST) ==
 
width of the small rectangle is missing (I assume it's 40mm)
 
== Part number 2.5 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:34, 15. Mai 2020 (CEST) ==
 
just some comments:
 
* please clarify countersinks; ø12mm circles can be omitted when you reference them e.g. like 12x90°) (see  [https://www.lehrerfreund.de/technik/1s/regeln-der-masseintragung-nach-norm-2/3105 these pictures] as example)
* detailed view is unnecessary
* dividing line between both rectangles makes no sense
 
== Part number 2.7 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 19:58, 15. Mai 2020 (CEST) ==
 
thread of left hole is undefined (for now it's just a hole)
 
→ omit the detail view and reference the holes with M5 x 20mm
 
== Part number 2.8 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 20:00, 15. Mai 2020 (CEST) ==
 
approved from my perspective, but please remove the optional part, technical drawings are there to create exact replicates of a thing (within the defined tolerances)
 
== Part number 2.9 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 20:01, 15. Mai 2020 (CEST) ==
 
approved from my perspective, but please remove the optional part, technical drawings are there to create exact replicates of a thing (within the defined tolerances)
 
== Part number 3 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 20:03, 15. Mai 2020 (CEST) ==
 
all "PDFs" link to STL files :)
 
== Part number 5.4.29 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 21:37, 16. Mai 2020 (CEST) ==
 
that's a standard part
 
== Part number 5.4.19 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 21:39, 16. Mai 2020 (CEST) ==
 
that's a standard part
 
== Part number 5.4.13 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 21:40, 16. Mai 2020 (CEST) ==
 
that's a standard part
 
== Part number 3.9 -- [[Benutzer:Martin|Martin]] ([[Benutzer Diskussion:Martin|Diskussion]]) 21:41, 16. Mai 2020 (CEST) ==
 
Export file missing
 
===Re: Part number 3.9 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 11:28, 8. Jun. 2020 (CEST)===
 
: stl file missing but can be produced from step file
 
== Part number 5.0.1 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:12, 24. Mai 2020 (CEST) ==
 
the assembly file need more details about the connection between the limit switches and power management board and BeBoPr++ ,(pin to pin connection  ) specially from power management board to BeBoPr++ .
 
== Part number 5.1.5 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:23, 24. Mai 2020 (CEST) ==
 
need more information for how to buy
 
== Part number 5.1.6 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:27, 24. Mai 2020 (CEST) ==
 
the link is not working
 
== Part number 5.1.12 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:37, 24. Mai 2020 (CEST) ==
 
need more information for search and buy in internet.
 
== Part number 5.1.15 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:42, 24. Mai 2020 (CEST) ==
 
quantity is missing
 
== Part number 5.1.16 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:43, 24. Mai 2020 (CEST) ==
 
quantity is missing
 
== Part number 5.1.17 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:43, 24. Mai 2020 (CEST) ==
 
quantity is missing
 
== Part number 5.1.18 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 18:43, 24. Mai 2020 (CEST) ==
 
quantity is missing
 
== Part number 5.2.2 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 17:36, 25. Mai 2020 (CEST) ==
 
for test
 
== Part number 5.2 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 17:36, 25. Mai 2020 (CEST) ==
 
for test
 
== Part number 5.2.2 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:11, 30. Mai 2020 (CEST) ==
 
the information for buying this item is not enough  .(package , size , ...)
 
== Part number 5.2.9 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:18, 30. Mai 2020 (CEST) ==
 
the info for buy from in internet is not enough . (name)
 
== Part number 5.4.2 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:50, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 5.4.4 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:52, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 5.4.5 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:53, 30. Mai 2020 (CEST) ==
 
link is not working
 
== Part number 5.4.6 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 22:54, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 5.4.10 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 23:00, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 5.4.11 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 23:00, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 5.4.27 -- [[Benutzer:Mehrdad|Mehrdad]] ([[Benutzer Diskussion:Mehrdad|Diskussion]]) 23:07, 30. Mai 2020 (CEST) ==
 
this item need more info for finding in internet
 
== Part number 2.1 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:32, 2. Jun. 2020 (CEST) ==
 
Should be possible to produce according to the drawing, but it's far away from a standardised one.
* Should use symmetry of the component
* clear decimal places which are not needed 
* Make dimensioning suitable for production
* Dimensioning of holes, clearence holes and sinks has to be adapted to the respective standards
* Absence of tolerence
* Clear all "mm" in dimensioning. Mechanical technical drawings always use mm as unit, except declared different
 
== Part number 2.1 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:33, 2. Jun. 2020 (CEST) ==
 
.stp file missing.
 
== Part number 2.2 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:37, 2. Jun. 2020 (CEST) ==
 
* Drawing inadequate, see comment on part 2.1
* stp file missing
 
== Part number 2.3 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:47, 2. Jun. 2020 (CEST) ==
 
* clear decimal places which are not needed 
* Make dimensioning suitable for production
* Dimensioning of holes, clearence holes and sinks has to be adapted to the respective standards
* Absence of tolerence
* Clear all "mm" in dimensioning. Mechanical technical drawings always use mm as unit, except declared different
* .stp file missing
 
== Part number 2.4 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:49, 2. Jun. 2020 (CEST) ==
 
* clear decimal places which are not needed 
* Make dimensioning suitable for production
* Dimensioning of holes, clearence holes and sinks has to be adapted to the respective standards
* Absence of tolerence
* Clear all "mm" in dimensioning. Mechanical technical drawings always use mm as unit, except declared different
* stp file missing
 
== Part number 2.5 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 15:57, 2. Jun. 2020 (CEST) ==
 
* Should use symmetry of the component
* clear decimal places which are not needed 
* Make dimensioning suitable for production
* Dimensioning of holes, clearence holes and sinks has to be adapted to the respective standards
* Absence of tolerence
* Clear all "mm" in dimensioning. Mechanical technical drawings always use mm as unit, except declared different
* stp file missing
 
== Part number 0 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 16:01, 2. Jun. 2020 (CEST) ==
 
With respect to the technical drawings of all plates(part numbers 2.%)
Should be possible to produce according to the drawings, but it's far away from a standardised one.
* Should use symmetry of the component
* clear decimal places which are not needed 
* Make dimensioning suitable for production
* Dimensioning of holes, clearence holes and sinks has to be adapted to the respective standards
* Absence of tolerence
* Clear all "mm" in dimensioning. Mechanical technical drawings always use mm as unit, except declared different
* stp files missing
 
== Part number 1 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 16:08, 2. Jun. 2020 (CEST) ==
 
Agree, assembly instructions are missing. But there were some in the old project.
 
== Part number 1.6 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 16:21, 2. Jun. 2020 (CEST) ==
 
Dimensions are unclear.
 
== Part number 1.12 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 16:31, 2. Jun. 2020 (CEST) ==
 
link refers to a spindle with 642 mm length.
 
== Part number 1.16 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 10:49, 8. Jun. 2020 (CEST) ==
 
* nominal length missing
* meaningless description
 
== Part number 1.22 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 11:02, 8. Jun. 2020 (CEST) ==
 
Simple part could also be produced if not available in shop. For this dimensions could be useful
 
== Part number 1.23 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 11:04, 8. Jun. 2020 (CEST) ==
 
could also be assigned to production (if dimensions were given)
 
== Part number 1.26 -- [[Benutzer:Micha|Micha]] ([[Benutzer Diskussion:Micha|Diskussion]]) 11:14, 8. Jun. 2020 (CEST) ==
 
Manufacturer independent description missing. When the link dies, this part is irreproducible. If there does not exist any independent description, technical drawing for production matters will be needed.

Latest revision as of 18:59, 12 October 2020

-- Martin (talk) 13:27, 21 September 2020 (CEST)

- Software installation instructions couldn't be loaded from OHO's page ("Failed to load PDF document.")

- License is CERN OHL **v1.2**

- [source files](https://github.com/opensourceimaging/cosi-measure/tree/master/Mechanical%20System/Complete%20System) for mechanical assembly (complete system) are missing

- [manufacturing instructions](https://github.com/opensourceimaging/cosi-measure/blob/master/Mechanical%20System/2019-01-11_cosi-measure_v1.0_mechanical_assembly_instructions.pdf) are missing → those are important to understand the mechanical assembly of the complete system as there're just Fusion360 files and PNG exports available

- bottom line in mechanical drawings is a little misleading :) → "This drawing is our property; it can't be reproduced or communicated without our written consent." → I'm seeing the CERN OHL v1.2 as such a written consent :)

Part number 1.6 -- Martin (talk) 13:37, 21 September 2020 (CEST)

please add dimensions

Re: Part number 1.6 -- Martin (talk) 13:50, 21 September 2020 (CEST)

Well, my assumption is that this is not an individual component for the mechanical assembly, but rather the material for self-designed components (aluminium plates). Hence bill of material and 'shopping list' are mixed. Nothing dramatic; for best practice I'd suggest to have

1. a neat bill of materials

2. an optional, separate shopping list

As said, nothing crucial. The relevant information is here.

Part number 1.25 -- Martin (talk) 13:40, 21 September 2020 (CEST)

"hexagon nut", not "screw nut" :)

Part number 1.16 -- Martin (talk) 13:55, 21 September 2020 (CEST)

length is missing

Part number 2.2 -- Martin (talk) 14:01, 21 September 2020 (CEST)

- Diameter for the 3rd hole (from the bottom left) is not specified. I assume it's also 5.5mm and needs a countersink

Part number 2.3 -- Martin (talk) 14:07, 21 September 2020 (CEST)

- I assume the ø16mm circles are the countersinks :)

Part number 2.5 -- Martin (talk) 14:23, 21 September 2020 (CEST)

- really no countersink for the ø6mm holes this time?

- diameter specification of holes is a little ambiguous, but one can guess from the drawing → shouldn't be a problem

Part number 2.8 -- Martin (talk) 14:35, 21 September 2020 (CEST)

- remove the second half of the note "Alternatively you can also make through hole …" → given that I bought the screws from the BoM, I'd rather make some threads :) (also: this note could be applied anywhere; unambiguous designs are better; skilled people may come up with personal deviations and forks themselves)

Part number 1 -- Martin (talk) 14:47, 21 September 2020 (CEST)

as mentioned in the `general review`, assembly drawing/instruction is missing

Part number 2.1 -- Pomelo (talk) 21:33, 3 October 2020 (CEST)

- The material for the plate is not specified, neither on the drawing nor in the table with the parts list (it is only mentioned in the assembly instructions in github)
- There are missing holes (8x?) and respective threads (M5?) on both ends of the drawn plate where plate 2? is meant to be attached (as observed in github)
- The dimension for the countersunk holes for the M6 screws is not clearly specified (or not specified) and the screws that belong in those holes are not identified with a position number on the parts list.
- It would be nice to see a drawing with a better distribution of the measurements to make it easier to read. Some suggestions: The holes should be represented by empty circles. The threads should be drawn around the holes. The part has a transversal symmetry that allows a reduccion of the number of written measurements. Modify the scale of the drawing to better fit the page or cut the part to allow for extra space on both ends.

Part number 2.2 -- Pomelo (talk) 21:55, 3 October 2020 (CEST)

Suggestions
- This part is symmetric. This can be use to declutter the drawing from redundant measurements and make it more readable.
- Not all holes diameters need to be there, specially if they are all equal. Add one measurement and make a note on the drawing to clarify.
- What is the optional countersink for? No need to specify diameter.

Part number 2.3 -- Pomelo (talk) 19:59, 12 October 2020 (CEST)

I am familiar with the complications of Free CAD in general and technical drawings are also a complex matter. It would be nice nevertheless to see a bit of consistency across the drawings when placing the measurements. Sometimes an isometric view in a corner of the drawing could help to give a better idea of how the part looks in 3D. Transparent/wire views also help to uncover some hidden features in simple parts.

OPEN HARDWARE OBSERVATORY 2020
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