Talk:Workshop Crane powered by drill

-- Inddigital (talk) 14:26, 15 December 2020 (CET)

Excellent project, very good analysis, just a comment

In the main frame, you can use three levels of hierarchy, for the numbering of the parts since it is an assembly with some complexity

Re: -- Aquilesmorillo (talk) 23:18, 15 December 2020 (CET)

Thank you.

Part number 1.18 -- Inddigital (talk) 23:43, 15 December 2020 (CET)

Will a 10 mm cable be sufficient to carry a 200 kg load?

Re: Part number 1.18 -- Aquilesmorillo (talk) 23:54, 15 December 2020 (CET)

Sure, you can use this table as a guide:

D [inch]	D [mm]	Safe Load [kN]
1/4	6.4	4.89
5/16	8	7.56
3/8	9.5	10.9
716	11.5	14.7
1/2	13	19.0
9/16	14.5	24.0
5/8	16	29.7
3/4	19	42.3
7/8	22	57.4
1	26	74.3

For 3/8" [9.5 mm], we have a safe load of 10.9 kN [1111 kg]

Table from: https://www.engineeringtoolbox.com/wire-rope-strength-d_1518.html

Re: Re: Part number 1.18 -- Inddigital (talk) 00:03, 16 December 2020 (CET)

Good ♠

-- Inddigital (talk) 03:03, 16 December 2020 (CET)

How is the mechanical behavior in extreme cases, such as impacts?

Re: -- Aquilesmorillo (talk) 03:05, 16 December 2020 (CET)

A simulation was made as an example, which shows the mechanical behavior to a vertical impact load caused by a slope, obtaining satisfactory results, you can see it in Technical Documentation.

Part number 1 -- Inddigital (talk) 03:33, 16 December 2020 (CET)

You used a program to compare the height of this frame with the height of a person, where can I get that program, is it Open Source?

Re: Part number 1 -- Aquilesmorillo (talk) 03:38, 16 December 2020 (CET)

That program is fSpy, (Open source still image camera matching), it was used as part of the reverse engineering process. You can find it at:

https://fspy.io/

Part number 1.18 -- Aquilesmorillo (talk) 03:51, 16 December 2020 (CET)

According to the information gathered from the video, it is preferable to use a metal pulley

https://www.savacable.com/pulleys-design-information

Part number 1.19 -- Inddigital (talk) 16:43, 16 December 2020 (CET)

Do you have a reference gearbox in the current market?

Re: Part number 1.19 -- Aquilesmorillo (talk) 16:55, 16 December 2020 (CET)

It is important to select a gearbox with a high ratio like the one used here of 1:100 and with the required safety to prevent the load from being returned. Here is a reference, that supplier offers reducers with auto-blocking system (99 series) and with the required ratio:

http://www.bj-gear.com/en/products/standard-solutions/gearboxes/worm-gearboxes/

Part number 1.10 -- Aquilesmorillo (talk) 17:15, 16 December 2020 (CET)

The purpose of these pieces is to place the wheels, which I think can be omitted, by placing these wheels directly on the structure

Part number 1.11 -- Aquilesmorillo (talk) 17:30, 16 December 2020 (CET)

This piece is a plate subjected to pure traction, which works as a tensioner, under this condition, can support more than 2000 kg

Part number 2 -- Inddigital (talk) 17:36, 16 December 2020 (CET)

The pivoting arm, in its lowest position, is still functional?

Part number 3 -- Inddigital (talk) 17:39, 16 December 2020 (CET)

Does the structure remain stable in the case of maximum extension of the telescopic tube?

Part number 5.3 -- Aquilesmorillo (talk) 17:54, 16 December 2020 (CET)

I'm not sure if plastic wheels can withstand heavy use in a durable way, here I leave a reference to some models that support the load
https://www.urbaboxx.co.uk/freestanding-shelving-c1/chrome-wire-shelving-c2/heavy-duty-castor-wheels-for-chrome-shelving-units-100-mm-wheels-with-m8-thread-set-of-4-p599

Part number 4 -- Inddigital (talk) 18:35, 16 December 2020 (CET)

This piece, where the leg is anchored, contains machining that can affect its mechanical strength, by stress concentrators, I recommend a separate analysis, considering its geometry

Re: Part number 4 -- Aquilesmorillo (talk) 18:38, 16 December 2020 (CET)

Thank you for your observation, that is correct, a separate stress analysis is required in that piece, no longer by frame analysis but by finite elements

Part number 1.21 -- Inddigital (talk) 18:50, 16 December 2020 (CET)

This item can be developed as a production part