### Author Topic: Linear motion from a motor  (Read 1449 times)

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#### duste83

• Jr. Member
• Posts: 16
##### Linear motion from a motor
« on: February 20, 2010, 07:49:02 AM »
What is the best way in using a motor for linear motion and adding torque?  I need something simple and easy.  Any ideas would be greatly appreciated.

#### Soeren

• Supreme Robot
• Posts: 4,672
##### Re: Linear motion from a motor
« Reply #1 on: February 20, 2010, 08:05:24 AM »
Hi,

What is the best way in using a motor for linear motion and adding torque?
That depends... What length should the move be, how fast, how much torque?
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Engineering is based on numbers - not adjectives

#### duste83

• Jr. Member
• Posts: 16
##### Re: Linear motion from a motor
« Reply #2 on: February 20, 2010, 08:32:12 AM »
I am building a life sized R2-D2.  This is for the third (center) leg.  It will need to go about a foot in about 2-3 secounds and will need to hold most of the weight of the robot.  A great start for my first robot.

#### Soeren

• Supreme Robot
• Posts: 4,672
##### Re: Linear motion from a motor
« Reply #3 on: February 20, 2010, 09:22:32 AM »
[...] and will need to hold most of the weight of the robot.  A great start for my first robot.
A great start would be supplying the parameters needed:
So, 12", 2..3 seconds, ?N/m.
And what is it gonna weigh?
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Engineering is based on numbers - not adjectives

#### nottoooily

• Full Member
• Posts: 91
##### Re: Linear motion from a motor
« Reply #4 on: February 20, 2010, 05:53:16 PM »
- wire and pulleys
- crankshaft - needs to have a gearmotor that can't be reverse driven.
- pneumatic - how about a bicycle pump for a cylinder??

I like crankshaft best because if you don't mind some front/back angling of the leg you can do it without any moment-supporting sliding channels to guide the leg through.

But really the choice depends on loads of information that only you know. Certainly no single best way.

• Jr. Member
• Posts: 16