log grapple
 

anyone have any ideas how i can make a log grab open and close without using hydralics

Re: log grapple
 

What will you be putting the grapple on? Maybe a cable driven system like a clam bucket on a crane would work?

Re: log grapple
 

it will be on an excavator just dont want to buy another valve

Re: log grapple
 

i made one just using a small srevo work ok but i need to do some reworking on it you should find one with metal gear's cus my plastic did not last long when i was towing the shop's push broom around. what are you looking for it to go on?


http://i263.photobucket.com/albums/i...PICT0004-1.jpg
http://i263.photobucket.com/albums/i...PICT0007-1.jpg
or this is a cale one i made has more power but should have made the grapple arms thicker and interlock to stop twisting.
http://i263.photobucket.com/albums/i...PICT0005-2.jpg

Re: log grapple
 

You could try using a standard servo..Hitech makes a few very strong ones that you could try and hide in the grapple body and use mechanical linkage

Re: log grapple
 

how do you do the likage for it

Re: log grapple
 

i will find some pic's of it when i get home what kind are you looking to do? loader stile or for a skidder? cus they are a little different.

Re: log grapple
 

its for a log loader

Re: log grapple
 

servo would be easy and the size you want a standard servo would work

Re: log grapple
 

yeah im thinking of saving money i have the ram but dont have the funds for another valve

Re: log grapple
 

well do you want it crancked out with a place for a standard servo

Re: log grapple
 

yes that will work :)

Re: log grapple
 

are you shure???? lol

Re: log grapple
 

well it should be big enough to get theservo or the ram in there correct

Re: log grapple
 

but for the linkage thats what is different between the two

Re: log grapple
 

go with the servo

Re: log grapple
 

not sure how much torque you want but hobby city do some heavy servos at good prices http://www.hobbycity.com/hobbyking/s...&ParentCat=189 id avoid the bluebird servos though as ive burned a few of those out on my monster truck steering

Re: log grapple
 

honestly i can say i have never burnned out a servo

Re: log grapple
 

well i have an all steel grapple made but for the size the servo hangs out the back is that ok?

Re: log grapple
 

yeah that is fine you got some pics:)