Tips for a small vertical lift

Other Hardware Motors, Mechanics, Power and CNC
1

Hi everyone!

I'm trying to build a small vertical lift (max 60Kg of load). The project is really interesting to me because I will love to sell an industrial version of it.

I'm struggling in the choice of motors for the movements. As I can see there are a lot of linear actuator with 1000N (enough to move the load in all of three axis), but they are really slow (around 7mm/s). Others are faster but weaker.

I think there are other architecture that can do what I want: move 100Kg with a speed near to 500mm/s; but I'm not able to find them. Can you help me with that?

Thank you

2

To lift M=100 kg by h=0.5 m in 1 second requires a motor that can deliver well over 500 watts.

The formula is P=Mgh/s (where acceleration due to gravity g = 9.8 m/s/s), P = 490 watts.

With a less powerful motor, increase the time s by using a gearbox.

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3

Are you designing to push the load up or to pull the load up?

4

So do you mean a motor around 750W? That's really a lot.
Gearbox will really slowdown the time, making the product too slow for be used by more people in a period

5

You are asking a lot. The formula is elementary physics.

Not if you use a suitably powerful motor.

6

The vertical guide have to push up, the others need to push horizontally.
I know there are hoist, but they doesn't fit well with my project. And it can't be used horizontally too (I think so)

7

Does your design require power to hold position or to return to a relaxed position?

8

Well, I would like that the home position will be with x and z axis at 50% and y axes at 0, but it doesn't really matter

9

Fine, but does your design require continuous power to hold any position?

10

Sorry.
Do you mean the items positions? Nope. They are supported by a metal guide (like pallets)

11

Confirm that gravity will not effect the position.

12

Fine.
So should I go for a e-bike motor with an endless screw? I saw they are 750W and that's should be enough.

13

a sketch of what you plan would be useful. The liftb motor is not the only consideration

14

Most elevators use a counterweight to reduce the overall power requirements. Otherwise the motor has to lift the platform and cables as well.

15

There are likely to be approvals and regulations you need to meet with you product , such as machinery regulations .

Have a look at how other lifts operate ( counter weights , safety brakes etc ) before revinventing the wheel .

16

You are right...
Not good in drawing and 3D modeling. I hope it is understandable.
Axis move with a motor and an endless screw

Screenshot 2024-05-06 alle 21.55.36
Screenshot 2024-05-06 alle 21.55.361618×1044 68.4 KB

17

But it will highly increase the size... right?

18

Yeah I did this for some months. The cost of those machines are really high and they are really big, so they can put really big motors. Also they not really show the components of their machines and I don't understand complicates mechanical movement (I'm just a developer :smiling_face_with_tear:)

19

Positioning in three dimensions - that ISNT just a small vertical lift.

Moving that mass at that speed just requires enough power to overcome friction.
However accelerating or stopping it is a different matter.
Your structure will need to be sufficiently rigid, which will increase the size and weight.

Clearly not a physicist. You havent defined your parameters. Principally what positional accuracy you would require, and the maximun acceleration.

20

The mechanical Engineering aspects of this are the difficult aspects to solve .
Materials, power , safety etc .

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