linear actuators

[lankeeyankee]

Does anyone here have any expierence with linear actuators? Electric cylinders? If so can you share your expierence and knowledge.

I am looking for one that has a stroke of 3 inches (keep the jokes)
Speed isnt really important
Power, needs to have about 4-6lbs of pushing power.
Fairly compact..

Anyone out there?

 

[lankeeyankee]

Oops forgot to attach a picture of one.

 

[one2dmax]

Nothing nearly that long a stroke but could you use a power door lock cylinder and a linkage arm?

Sean

 

[dannymax]

Is it possible to adapt a 4 wheel drive, front pumpkin, actuator?

 

[vmax190]

Does anyone here have any expierence with linear actuators? Electric cylinders? If so can you share your expierence and knowledge.

I am looking for one that has a stroke of 3 inches (keep the jokes)
Speed isnt really important
Power, needs to have about 4-6lbs of pushing power.
Fairly compact..

Anyone out there?

what do you need to know lankee, i have used them a lot. dave

 

[gleno]

Yes. What do you need to know?

 

[lankeeyankee]

OK here is what is in the works. I can tell you guys since none of you will be bracket racing with me here in Nashville.. Not getting to deep into bracket racing and reasons I am burning oil on this but here goes..

This is being used on my VMAX. Goal is to be highly competetive bracket racing on my street bike against drag bikes with electronics, air shifter, slick wheelie bars and what else they can use to get an advantage on the saturday night racing program at the dragstrip.. All of this has to be very precise I am working with no more of a tolerence of .005

I am trying to make a throttle stop control..
Basically how its going to work is..
When I twist the throttle physically wide open the carbs will actually be around 1/8 open which will be around 6500-7000 RPMS
Once the time delay is out it will then allow the throttle to go wide open..

The throttle stop design is designed to where I dont feel any change in the throttle during this process..


*I am not looking for a door strike,, 12VDC solenoid, nor any pneumatic air cylinders* I have the throttle stop designed already..

Keys on the device that is going to do the physical work..​

1) Linear accuator needs to be strong enough to open the carbs which is Hmmm guessing around 6-8KG of pull??
2) Size. I would like to hide it in behind the left scoop where the white throttle block is that connects the throttle cables.
3) Stroke only needs to be a max 2.5 inches.
4) Speed of push stroke should be able to travel 2.5in within .8 - 1.3 seconds.

Accuracy is very important on how fast it reacts.
It travels from home postion to working postion within a .005 accuracy.
Accuracy is more important then the actual working speed but it MUST be able to travel within 1.5 seconds

I am currently working a Basic Stamp Microcontroller Module and 2 Delay on Brake Timers to control this linear accuator, which will work off of 2 SSR's for its home to working postion and from its working postion back to its home postion..

UNLESS anyone of you have a better way to control this.

Thanks in advance for advice on this..

Max Cost for this project: $300.00 (since its a prototype and has never been used before I dont want to sink thousands of dollars into it..

 

[lankeeyankee]

Damn have I ran you all off with one of my burrito bombs:confused2:

Ok I have ordered all the parts to complete this project. I went with a German made Linear Acuator with a 2in stroke and a speed of .75" 1 sec with a max load of 16lbs. built in limiter switches. Its very compact shorter then a ball point pen. The accuracy tolerence is .05MM So with the power of 16lbs it shouldnt hardly work very hard to pull the carbs open.
Went with 2 double pole relays for the throttle stop on and for it to go full throttle. I am going to use my orginal timer for the control of the throttle stop. Purchased a Dedenbear Super Crossover Delay with some pretty trick features on it.
Basic operation when its complete and I hope it all works after I get it dialed in..

Stage in
Pull the clutch in.
Push micro switch located under horn button.
Crossover Delay Timer is activated
Throttle Stop Timer is activated
Activates Line Lock for clutch. (Clutch is held in by line lock)
Linear Acuater Cylinder goes to push working position only allowing roughly 1/8 throttle.
First Top Amber LED flashes on the christmas tree
Release Micro Switch
Delay Timer starts counting down to set delay within .001
Throttle Stop Delay Timers starts counting
Crossover delay time reaches its set value clutch is disengadged
Bike leaves the line
After the set hmm 2.0s-2.4s throttle stop timer ends
Linear Acuator will go to its home postion as it pulls the carbs to WOT and hang on as we watch for the shift light >>>>!!!!:clapping:

Now thats bracket racing:eusa_dance:


PLease Close This Thread.. I am done with here.,,

 

[kaboom]

So alls you haf'ta do is hold on and steer????:ummm:Oh....shift also.....


Sounds like a wild ride:clapping:

 

[gleno]

Seems you have thought the issues through. Good luck with the timing and synch issues.

Let us know how the prototype goes or better still post vid of the run unk:

 

[naughtyG]

yea Donn, if you blow up and disappear in a cloud of green burrito smoke I sure wanna have a vid of it! :rofl_200::rofl_200::rofl_200:

 

[44 magnum]

Hey there LY-

I'm sure you've likely forgotten more about electronics than I've known in the first place, so please bear with me on this question. Also, I know **** about drag racing.


Does it pose a problem if the 'tree' goes green before your timers run out, or vice versa?

 

[lankeeyankee]

So alls you haf'ta do is hold on and steer????:ummm:Oh....shift also.....


Sounds like a wild ride:clapping:

Yeah pretty much!
The bike will be taking off on its own.. and it will acclerate on its own once it gets some speed up around 25MPH

Clutch Disengauges on its own and the speed of the clutch releasing is controlled through a flow control valve. I will post a video on youtube tomorrow evening.


This is nothing new to me nor is it front news technoligy break throug. My dragbike had an auto shift so basically all I was there was to steer it... now if i can just find some devices to do that:ummm:

 

[lankeeyankee]

Hey there LY-

I'm sure you've likely forgotten more about electronics than I've known in the first place, so please bear with me on this question. Also, I know **** about drag racing.


Does it pose a problem if the 'tree' goes green before your timers run out, or vice versa?

Yes it will pose a problem if the time runs out before the light turns green just as much if its to late.
It will most likely cause a red light which means "left the starting line to soon"
Or a late reaction due to much time in the delay..

I am still reacting. Most weekend racers with no electronic devices focus on the last yellow light on a drag racing christmas tree.
With a delay box / timer I am reacting to the first amber on the christmas tree and once the pre set adjustable time is up it will launch the bike..

Even though its electronic mechanical devices it still takes time to work the bugs out and twek it in.. Dragracing is mostly measured in the .001

There is a lot that goes into bracket dragracing then just raising hell down the track. A lot of focus, speed and distance judging and many other things that seperate the winners and losers.

 

[lankeeyankee]

Well its coming long nicely. I got the linear accuator in Monday and just finished up v01 of the throttle control. Nothing real fancy on the mock up. I first want to see how its performace is going to act at the track before I make it look all purty and ****. I ordered all new cables from Motion Pro and they should be here hopefully by the end of the week. Unfortuntetly I dont think I am going to be ready for the first Friday night, bike is still tore down changing some wiring on the bike. Crossover delay got mounted over the weekend which came out nice and very useful...

This acctuator is a little slower then I expected from the numbers but it will be a smooth ride rather then an abrupt throttle action which I dont want. The key here is consistencey..
Speed is .75" @ 1s
Power is 15lbs. plenty to pull a throttle open.

Now the question is mounting this damn thing to where no one will see it along with the 3 DPDT relays:confused2:

 

[44 magnum]

Very nice! Hey do you still ride your max on the street, or just on the track? I just think it'd be funny as hell to see some dip **** try to pull you off the line at a light. :biglaugh:
-

 

[lankeeyankee]

Very nice! Hey do you still ride your max on the street, or just on the track? I just think it'd be funny as hell to see some dip **** try to pull you off the line at a light. :biglaugh:
-

Yeah I will ride the bike on the street this year. Mostly to the dragstrip and back home. I am not really interested in riding the VMAX on the street since it handles like **** and new 600 sport bikes can walk off on it. I will mostly race it at the track until it blows up and dump it off into the nearest lake, or may take it to the local fair and charge 5.00 a hit with a sledge hammer