Linear Actuators

Ineffable · 11-17-2009, 04:19 PM

This is kind of a shot in the dark but I am working on a project and was wondering if anyone here knew anything about belt drive or screw linear actuators that wouldn't mind if I bounced a few ideas off them. If so just send me a PM or post. Thanks.

Trip · 11-17-2009, 04:26 PM

what are you trying to accomplish?

Ineffable · 11-17-2009, 04:41 PM

I need a high speed linear actuator meeting the following requirements:

6" of travel

Speeds capable of making 3 complete trips a second
(one end to the other and back)

Able to push with a minimum force of 31 Newtons and maximum of 133 N
(Or have the ability to be programmed to release if it meets resistance requiring more than 133 N of force to overcome)

Goal is that the whole assembly will be under 12" long but that is somewhat flexible

Can be any type of drive train, DC or AC powered but not pneumatic

Needs to be programmable through a controller box. (Goal is to program a hand held remote with analog switches for operator interface)

I really like the idea of servo driven however given that it is mounted vertically and I don't know how to incorporate a brake so it doesn't fall to the bottom of the track and cause damage to itself in the event of power loss then I can't use one. Any ideas?

Kerry_129 · 11-17-2009, 06:48 PM

Off the top of my head, that's a very tall order & way beyond the capabilities of a typical screw actuator. The speed required is quite high (36in/sec total travel + accel/deccel time ~> 50+in/sec max speed) - typical linear actuators are in the 50~100 in/min range. With any actuator that can handle the speed/cycle-time you stated, the kicker will be the inertia of whatever you're trying to accelerate & reverse.

A roller-screw actuator is going to be much closer to the capability of what you're describing, but I still don't think they will handle the speeds (and resultant inertial force) you said need.

http://www.exlar.com/TI_ref_rollScrew_oview.html

http://www.exlar.com/prods-linear-oview.html

Ineffable · 11-18-2009, 09:02 PM

Thanks Kerry, I ended up ordering a GSM20-0604 actuator from them.
You are right on the inertia but there engineers assure me it will manage.

askmrjesus · 11-18-2009, 09:20 PM

You're building one of those robotic dildo machines, aren't you?

Don't pretend you don't know what I'm talking about, pervert.

JC

Ineffable · 11-18-2009, 09:50 PM

lol maybe you are really Jesus. Thats exactly it.

askmrjesus · 11-18-2009, 11:45 PM

Quote:

Originally Posted by Ineffable

lol maybe you are really Jesus. Thats exactly it.

6 inches of travel, and 3 complete trips per second gave it away.

Props for figuring out pussy resistance in newton meters. The last time I brought a torque wrench into the bedroom, my ex-wife spent the weekend crying in the closet.

She never writes me.

JC

Ineffable · 11-18-2009, 11:48 PM

I just finished it here is a picture.

shmike · 11-19-2009, 10:54 AM

It's beautiful.

11-17-2009, 04:19 PM	#1
Ineffable Kneedragger Join Date: May 2008 Location: Boulder CO Moto: 2009 KTM RC8 Posts: 166	Linear Actuators This is kind of a shot in the dark but I am working on a project and was wondering if anyone here knew anything about belt drive or screw linear actuators that wouldn't mind if I bounced a few ideas off them. If so just send me a PM or post. Thanks.

11-17-2009, 06:48 PM	#4
Kerry_129 Semi-reformed Squid Join Date: Nov 2008 Posts: 531	Off the top of my head, that's a very tall order & way beyond the capabilities of a typical screw actuator. The speed required is quite high (36in/sec total travel + accel/deccel time ~> 50+in/sec max speed) - typical linear actuators are in the 50~100 in/min range. With any actuator that can handle the speed/cycle-time you stated, the kicker will be the inertia of whatever you're trying to accelerate & reverse. A roller-screw actuator is going to be much closer to the capability of what you're describing, but I still don't think they will handle the speeds (and resultant inertial force) you said need. http://www.exlar.com/TI_ref_rollScrew_oview.html http://www.exlar.com/prods-linear-oview.html Last edited by Kerry_129; 11-17-2009 at 06:51 PM..

11-18-2009, 09:20 PM	#6
askmrjesus Soul Man Join Date: Nov 2008 Location: Everywhere, all the time. Moto: '0000 Custom Turbo Cross (with jet kit). Posts: 6,481	You're building one of those robotic dildo machines, aren't you? Don't pretend you don't know what I'm talking about, pervert. JC __________________ The way things are going, they're gonna crucify me.

11-18-2009, 09:50 PM	#7
Ineffable Kneedragger Join Date: May 2008 Location: Boulder CO Moto: 2009 KTM RC8 Posts: 166	lol maybe you are really Jesus. Thats exactly it. Last edited by Ineffable; 11-18-2009 at 10:33 PM..

11-19-2009, 10:54 AM	#10
shmike Follower Join Date: Nov 2008 Posts: 5,549	It's beautiful. __________________ Racing For Smiles

11-17-2009, 04:41 PM	#3
Ineffable Kneedragger Join Date: May 2008 Location: Boulder CO Moto: 2009 KTM RC8 Posts: 166	I need a high speed linear actuator meeting the following requirements: 6" of travel Speeds capable of making 3 complete trips a second (one end to the other and back) Able to push with a minimum force of 31 Newtons and maximum of 133 N (Or have the ability to be programmed to release if it meets resistance requiring more than 133 N of force to overcome) Goal is that the whole assembly will be under 12" long but that is somewhat flexible Can be any type of drive train, DC or AC powered but not pneumatic Needs to be programmable through a controller box. (Goal is to program a hand held remote with analog switches for operator interface) I really like the idea of servo driven however given that it is mounted vertically and I don't know how to incorporate a brake so it doesn't fall to the bottom of the track and cause damage to itself in the event of power loss then I can't use one. Any ideas?

11-18-2009, 09:02 PM	#5
Ineffable Kneedragger Join Date: May 2008 Location: Boulder CO Moto: 2009 KTM RC8 Posts: 166	Thanks Kerry, I ended up ordering a GSM20-0604 actuator from them. You are right on the inertia but there engineers assure me it will manage.

11-18-2009, 11:48 PM	#9
Ineffable Kneedragger Join Date: May 2008 Location: Boulder CO Moto: 2009 KTM RC8 Posts: 166	I just finished it here is a picture.