Talk:Workshop Crane powered by drill

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-- 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, I will keep this in mind for improved versions of the equipment.

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?

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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:

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

Good ♠

-- Thehunter (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.

07-12-20 04-55-00 p.m..jpg

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?

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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:

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

Part number 1.19 -- Thehunter (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:

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 -- Thehunter (talk) 17:36, 16 December 2020 (CET)

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

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Re: Part number 2 -- Aquilesmorillo (talk) 03:25, 8 April 2021 (CEST)

I would need to do more simulations, but it is best to run tests on a real or scale model.

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?

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Re: Part number 3 -- Aquilesmorillo (talk) 03:27, 8 April 2021 (CEST)

Yes, as long as the center of gravity of the loaded system does not move too far away, the equipment is stable, this is guaranteed by having the legs practically under the load.

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

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

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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 -- Thehunter (talk) 18:50, 16 December 2020 (CET)

This item can be developed as a production part

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Re: Part number 1.21 -- Aquilesmorillo (talk) 03:24, 8 April 2021 (CEST)

I think the same, an improvement of the equipment should be made with these changes.

Part number 6 -- Inddigital (talk) 19:17, 23 December 2020 (CET)

This piece can have an intermediate guide to align the charging cable...

Re: Part number 6 -- Aquilesmorillo (talk) 03:29, 8 April 2021 (CEST)

Agreed, in any case it would be in an improvement of the equipment.
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