Identifying an Electro mechanical system to avoid hydraulic system 1

[DR91]

Hello everyone
Can anybody help me with finding an ElectroMechanicalSystem(EMC)for sliding 7 tonnes load on guiding rails. the requirement is to have linear motion of 400mm max.
I have found the below system.But can anybody make me more sure that it can slide the the load at all conditions.the whole system will be on a truck so it has to sustain even when it transported.

http://www.parker.com/portal/site/P...LECTROMECHANICAL+CYLINDER+-++XFC+SERIES&Wtky=

 

[DR91]

Thanks for the response.But my question was about more keen in finidng the Electromechanical system like it is in the link i mentioned. Can u look into that and help me whether it can withstand for my requirement.

 

[Jboggs]

You have identified the weight to be moved, but you have not identified the force required to do that. You must quantify the friction in your system. You also did not mention the acceleration/deceleration. Both of those factors directly affect the force required from your actuator. You also did not mention accuracy or precision. Highly accurate systems will be much more expensive. The Parker system might work just fine. You must ask the manufacturer, not an online forum. Also check Nook Industries, Duff-Norton, Raco Actuators, and Joyce-Dayton.

 

[DR91]

Hi Thankyou for the response.The system and the components nothing has fixed yet it is still in the design level. Idea is to have the load on the platform and move it on the guiding rails.
So i think i have to caliculate depending on the cofficient of friction on the rails.
Acceleration should be slow ..it should be fine if it travel 400mm in 3 sec.
Accuracy is important but precision need not be in micro level.
I look into the companies which u have suggested and get back if i have questions.

 

[MintJulep]

Design process works best if you quantify requirements first, then select components that fulfill those requirements.

 

[IRstuff]

You only actually stated ONE requirement, i.e., the stroke length. The weight of the item is only partly relevant; the question there is what is the friction, hence, the lateral force required to move the item on its rails. One of the items from your cited site is

http://www.parker.com/portal/site/P...ELECTROMECHANICAL+CYLINDER+-++XFC+SERIES&Wtky

which has a 20-ton lift capacity, which is more than the entire weight of your item.

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[BrianPetersen]

There are lots of ways this can be done.

The motor can either be a servo motor or a regular motor driven by a VFD. The VFD could be a fancy one that emulates a servo motor, or it could be a dumb one that blindly follows a motion profile.

The mechanics can be a ball screw, or an ACME screw, or a timing belt with pulleys, or a cable that winds up on a drum.

There may be a gear reducer between the motor and whatever the final actuating mechanism is.

The positioning accuracy, the tolerance of abuse, the immunity to moisture and dirt, the long-term durability of each of these mechanisms ... varies.

YOU need to figure out what you need.

 

[tbuelna]

Moving a 14,000lb load a distance of 15.8" sliding on horizontal(?) rails will take a bit of power. The roller screw EMA linked is a very efficient mechanism. It can be provided with a friction brake that should be capable of holding more than the driving force.