What to use for my project, Stepper or Servo?

[Scott in AZ]

Actually this is my first post, and I unfortunately am very unfamiliar with what I am needing. Please bear with me .

I am looking to build a type system that can support my project.

Basically I have a solid piece I need to move that is 150 pounds total 25" long by 13" wide and 6" tall.

I need a motor to move -10 degrees to 90 degrees to support all this. I am looking for speed and accuracy. I would like to be able to stop it at any place from 1/4 -1/2 increments.

ALSO.... as just as important to be able to stop it at any point from -10 to 90 degrees, I would like to be able to be able to go not only forwards but backwards just as fast and accurate.
I have been trying to read up on servos and Stepper motors, but I just can't tell which one is the best for my project.

I am also limited to 12, 24 and at the most 36 volts.

The pivot point on the mount can even be placed in the middle of my project, so the motor does not necessarily have to be way in the back on the project.

Okay so I think I got everything on that post, but I am sure you all will ask me things I have not yet thought of.
It would really be cool if I could talk to someone about this instead of taking so long to post. Ya I am a slow typer, and find it hard to get my point across at times.
My cell number is 602-206-0925

Thanks everyone

[DennisCNC]

Can you make a drawing of what it will be. As for servo or stepper both will be just as accurate with a big enough servo motor you can make it very fast. How do you plan to move the 150LB thing? screw, rack pinion, belt?

[Scott in AZ]

Thanks for the reply,
I will be making a mock up tomorrow out of poster board of my heavy project. I will video tap what I need it to do. Like I said I am not the greatest at discribing what I am looking to do, unless it's in person or over the phone.
Thanks

[Scott in AZ]

I know I didn't ask anything about the panning of my project, but just asked about the Tilt. I figured I didn't want to go to far with my first post.
The turn table type set up I am not to worried about, so I may not even ask how to's on that one.
One motor at a time, hmm ( Tilt ).
Here is the video I promised. I hope it answers all your questions. Feel free to ask more if you have them.
Thanks, Scott.

YouTube - HJHKSDKSHDKSHDKSHKJ

YouTube - HJHKSDKSHDKSHDKSHKJ

[DennisCNC]

I think you should get a award for the best idea presentation!!!!

How fast do you want the thing to go from -10 to 90 deg.? In seconds.
And same for the full rotation?

Is the speed of movement you have in the video good enough?

Do you need to jog it to position manually or do you want it programmed to stop at certain points?



For the motion components I would say a few worm gear boxes might do the trick depending how accuratly you need it to position. Or planetary gear boxes.

[Scott in AZ]

Originally Posted by DennisCNC I think you should get a award for the best idea presentation!!!! Thanks I tent to go over board a lot of people tell me. For some reason I can't do a video and not have any background music...LOL How fast do you want the thing to go from -10 to 90 deg.? In seconds. And same for the full rotation? As fast as possible, but minimum of 1 second per 90 degrees. And it's actually suppose to be -45 degree to 90. Not -10 to 90. I tried editing my first post to correct that, but it wouldn't let me. Is the speed of movement you have in the video good enough? No that would be way to slow. I could only move my arms and hands so fast. I was basically trying to show actual size and how it would move. Do you need to jog it to position manually or do you want it programmed to stop at certain points? I want to be able to use some type of joy stick type set up, so I can manually do everything myself. So I suppose that would mean jog,hmm ? For the motion components I would say a few worm gear boxes might do the trick depending how accurately you need it to position. Or planetary gear boxes.

I need the thing to be able to stop on a dime, in any position. I may want to go from maybe 0 to 34 degrees, or 37 to negative 6 degrees.

I have looked on you tube for hours trying to find something that would catch my eye that someone else has done, and came up with NOTHING. I do occasionally find someone doing exactly what I want to do , but unfortunately they only have to move 1-10 pounds with it, and not 150 pounds.
Thanks,Scott

[Al_The_Man]

I would agree with Dennis that you will need servo's for sure, for that weight and performance etc you will need high speed motors geared down for Torque, Planetary boxes could be an answer, the mechanics may pose a problem, it is a bit large even for a heavy duty robot, but some sort of gimbal mechanism may be a solution.
What are the limitations on clamping or grasping the item?
Al.

[Scott in AZ]

Originally Posted by Al_The_Man I would agree with Dennis that you will need servo's for sure, for that weight and performance etc you will need high speed motors geared down for Torque, Planetary boxes could be an answer, the mechanics may pose a problem, it is a bit large even for a heavy duty robot, but some sort of gimbal mechanism may be a solution. What are the limitations on clamping or grasping the item? Al.

This is the first I have heard of a Planetary Box, so I will go over to youtube and see if I can watch how they work.

Clamping and grasping ?
Well I have ideas in my head, but until I find out what kind of motor I am going to use, I am kind of at a stop for the mounting. I can do a long piston from one side of the project to the other. One side might have the motor Turing it, while the other side is supported and may have a bearing in it.
Sorry to sound like a complete newbie, but I just can't help it for the time being. Maybe I will hang out on this board and figure out the Lingual !
Thanks,Scott

[Scott in AZ]

Okay so I don't know why I didn't think about this before.....

Here is a video I found that resembles what I want. Basically picture this, but turing 150 pounds -45 degrees to 90 degrees.

YouTube - Stepper Motor

YouTube - Stepper Motor

[DennisCNC]

What speed do you need from the system? how many seconds to go from flat to vertical? what type of accuracy are you talking about .00, .000, .0000"?


Dennis

[Scott in AZ]

Originally Posted by DennisCNC What speed do you need from the system? how many seconds to go from flat to vertical? what type of accuracy are you talking about .00, .000, .0000"? Dennis

Flat to Vert in one second or less. I need to be able to stop it at any point going either up or down within a 1/8th of an inch .I would also like to be able to make it go really slow as well. I consider that pretty accurate.

[Scott in AZ]

I made another video, so that maybe you all can understand a little more.

This is as fast as my hands can move, and not the actual speed I want.

I rigged up a little mount so you can see how I need it to pivot. This will NOT be the mount I do the motor to.

YouTube - gfdgfdgf

YouTube - gfdgfdgf