Torque motor that can lift 10LB?

[HeyKitty]

I need a motor for a project, that can lift around 7-10lb.  Preferably cheap (duh).

[givingtnt]

17 minutes ago, HeyKitty said:

I need a motor for a project, that can lift around 7-10lb.  Preferably cheap (duh).

but how ?

direct torque ?

rack n pinion ? / infinit screw rack n pinion ?

lever ?

pullies ?

gears ?

 

you need to be specific about all those thins m8

[Doramius]

Also, does it need to be speed adjustable?  Or how fast should it wind?  What gauge cable are you using?

[HeyKitty]

4 minutes ago, givingtnt said:

but how ?

direct torque ?

rack n pinion ? / infinit screw rack n pinion ?

lever ?

pullies ?

gears ?

 

you need to be specific about all those thins m8

 

1 minute ago, Doramius said:

Also, does it need to be speed adjustable?  Or how fast should it wind?  What gauge cable are you using?

All I want to do is connect a motor to a button.

 

When the button is pushed the motor will lift the weight 2 inches

When the button is released it sets it back down.

 

The motor will be above the weight.

 

^That is the end result.  The cheaper I can get that result, the better.

[givingtnt]

3 minutes ago, HeyKitty said:

 

All I want to do is connect a motor to a button.

 

When the button is pushed the motor will lift the weight 2 inches

When the button is released it sets it back down.

 

The motor will be above the weight.

 

^That is the end result.  The cheaper I can get that result, the better.

so you have like a rope rolling around the motor ?

how presice you need to be ?

 

edit :

stepper ?

servo ?

how high above weight ?

what kind of clearance ?

[HeyKitty]

Just now, givingtnt said:

so you have like a rope rolling around the motor ?

That was the plan, yeah.

[givingtnt]

5 minutes ago, HeyKitty said:

That was the plan, yeah.

while I look around , here's a helpfull thing for you to look at 

 

http://www.ebay.com/gds/How-to-Buy-the-Right-Gear-Motor-for-the-Right-Job-/10000000007959002/g.html

 

im not sure exacly how much weight we pulled, but a few years ago I built a robot with a set of car window motors to pull up a thing.

 

it used a pretty big lever and pulley. but it worked really well.

they are 12V and are decently slow.

 

plus they have lots of torque. probably more than enough for your needs. you can always add pulleys.

 

major problem : fixing them to something is a pain.

 

also what input voltage n speed ?

[HeyKitty]

22 minutes ago, givingtnt said:

-snip-

So here is what I am looking at:

Button: https://www.amazon.com/dp/B007Q84RDU

 

SSR: https://www.amazon.com/dp/B00E1LC1VK/

 

Arduino Uno Rev 3 (Chinese but good enough for the job): https://www.amazon.com/gp/product/B006H06TVG/ref=ask_ql_qh_dp_hza

 

The goal is to have 3 buttons.

To raise the weight.

To stop the motor.

To Lower the weight.

 

The programming shouldn't be a problem.

 

~~~

It only needs to lift 10lb about 2 inches and hold it there. so speed can be slow.

[givingtnt]

1 minute ago, HeyKitty said:

So here is what I am looking at:

Button: https://www.amazon.com/dp/B007Q84RDU

 

SSR: https://www.amazon.com/dp/B00E1LC1VK/

 

Arduino Uno Rev 3 (Chinese but good enough for the job): https://www.amazon.com/gp/product/B006H06TVG/ref=ask_ql_qh_dp_hza

 

The goal is to have 3 buttons.

To raise the weight.

To stop the motor.

To Lower the weight.

 

The programming shouldn't be a problem.

 

~~~

It only needs to lift 10lb about 2 inches and hold it there. so speed can be slow.

what voltage ?

[HeyKitty]

1 minute ago, givingtnt said:

what voltage ?

That SSR can do 3-32VDC.  I figure 12vdc might be enough to do the job.

[HeyKitty]

8 minutes ago, givingtnt said:

what voltage ?

https://www.amazon.com/dp/B00O7IHVIA

This motor might do the job.

Not sure what I need to use to pull the cable though...

[givingtnt]

1 hour ago, HeyKitty said:

https://www.amazon.com/dp/B00O7IHVIA

This motor might do the job.

Not sure what I need to use to pull the cable though...

simple

drill a hole in the shaft

pass the cable

 

might want to get a motor with a bigger shaft tho...

 

or a keyd drum with the string attached to that

[bob345]

something like this will be ideal. it is a bit pricey compared to some other options. but it gives you quite a bit of headroom for weight and has a active holding torque where as brushed dc motors do not. That and you can easily program how far it moves, and how long it stays somewhere before dropping.

 

https://www.amazon.com/51-Planetary-Gearbox-Stepper-Precision/dp/B00QEVLDVO

 

along with the motor you will need a stepper driver like these.

 

https://www.amazon.com/Elegoo-Stepstick-Stepper-Printer-Robotics/dp/B01GJJGRF2/ref=sr_1_18?ie=UTF8&qid=1487965688&sr=8-18-spons&keywords=nema+17+driver&psc=1

[Blade of Grass]

1 hour ago, bob345 said:

something like this will be ideal. it is a bit pricey compared to some other options. but it gives you quite a bit of headroom for weight and has a active holding torque where as brushed dc motors do not. That and you can easily program how far it moves, and how long it stays somewhere before dropping.

 

https://www.amazon.com/51-Planetary-Gearbox-Stepper-Precision/dp/B00QEVLDVO

 

along with the motor you will need a stepper driver like these.

 

https://www.amazon.com/Elegoo-Stepstick-Stepper-Printer-Robotics/dp/B01GJJGRF2/ref=sr_1_18?ie=UTF8&qid=1487965688&sr=8-18-spons&keywords=nema+17+driver&psc=1

That's pretty expensive, I think something like a CIM or a power window motor could do the same job (at around $20-something dollars cheaper).

[HeyKitty]

When I said 10lb I was giving myself room for error. if it can lift 10lb it can DEFIANTLY lift what I need it to.  I just didn't want 20 recommendations on the cheapest thing that "hits" the requirements.

[bob345]

11 minutes ago, Blade of Grass said:

That's pretty expensive, I think something like a CIM or a power window motor could do the same job (at around $20-something dollars cheaper).

only problem with brushed dc motors is a lack of holding torque though. They can easily move 10 lbs, but the problem comes when you need to stop. when voltage is applied, thy just spin and when there is no voltage applied, they are easy to turn, This is where a stepper motor is a great solution as it has an active holding torque. That and they cam be set to move very precisely and consistently. To do the same thing with a brushed dc motor, you need an encoder and a complicated pid controll system.

 

9 minutes ago, HeyKitty said:

When I said 10lb I was giving myself room for error. if it can lift 10lb it can DEFIANTLY lift what I need it to.  I just didn't want 20 recommendations on the cheapest thing that "hits" the requirements.

in that case your average 5:1 reduction nema 17 motor should do the trick. Its a 4 wire 2 phase stepper so it can easily be driven by cheap steper drivers. Should have just a bit over 10lbs/in of torque. https://www.amazon.com/Gear-ratio-Planetary-Gearbox-stepper/dp/B01F8X875I/ref=s9_simh_gw_g328_i2_r?_encoding=UTF8&fpl=fresh&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=K4BB2C7XNAATK0ASZD2W&pf_rd_t=36701&pf_rd_p=2a864ace-95b0-4160-8611-8c68f18bad61&pf_rd_i=desktop

[Blade of Grass]

1 minute ago, bob345 said:

only problem with brushed dc motors is a lack of holding torque though. They can easily move 10 lbs, but the problem comes when you need to stop. when voltage is applied, thy just spin and when there is no voltage applied, they are easy to turn, This is where a stepper motor is a great solution as it has an active holding torque. That and they cam be set to move very precisely and consistently. To do the same thing with a brushed dc motor, you need an encoder and a complicated pid controll system.

Good point, I didn't think about the holding issue.

 

Tangent to OP:

The brake mode on most speed controllers should be sufficient to hold it in place, no? In my short career in FIRST robotics I never tried testing to see how much resistance was required to overcome it. 

As a programmer, I don't know if I would call a PID control system complicated  Also, some of the speed controllers that we used had PID systems built into them (Talon SRXs for example).

[W-L]

10 hours ago, HeyKitty said:

When I said 10lb I was giving myself room for error. if it can lift 10lb it can DEFIANTLY lift what I need it to.  I just didn't want 20 recommendations on the cheapest thing that "hits" the requirements.

You can get a cheap worm drive motor that is reversible if it doesn't require precision as others have mentioned. Something super cheap would be to go to a salvage yard and get a couple of window motor assemblies. 

[cameroncoats]

Linear actuator seems like an obvious solution here. They're not too cheap but there's no messing about with linkages etc and you don't need worry about braking etc. Check aliexpress if you don't mind slow shipping.

 

Edit: I take it back; they are cheap: AliExpress

Edited February 25, 2017 by cameroncoats

[Scheer]

12 hours ago, cameroncoats said:

Linear actuator seems like an obvious solution here. They're not too cheap but there's no messing about with linkages etc and you don't need worry about braking etc. Check aliexpress if you don't mind slow shipping.

 

Edit: I take it back; they are cheap: AliExpress

Yep, Linear actuator sounds like exactly what he needs.

 

One option, no specs on it, but I'd assume it has a capacity of ~100 pounds:  http://www.ebay.com/itm/12V-24v-DC-electric-linear-actuator-4-stroke-solar-tracker-Robotics-Rc-Robot-/322432688657?hash=item4b127c6211:g:5WAAAOSw4GVYLSYq

 

Or about $35 for a new one from eBay if you don't want to mess with AliExpress.

 

 

OP, if you really want to do a lift by rope and the motor you find isn't powerful enough you can always add in more pulley blocks to double the lift time, but also double the lift capacity.