Robbobs LCC

[Robbob]

Originally Posted by Mach1

Why delrin rods?
I am a noob on crawling but these are on the bottom of the ride.
I thought one whould want to shave weight on the top of his ride.
Shaving weight on the bottom makes your cg go up.

Sorry for asking I am a noob on crawling.
Just ordered mine.

Originally Posted by DBR

As much as you are saving weight, you are also gaining less friction. Delrin will slide over rocks better than alluminum.

also this way I knew the uppers would be the same length and not cause headaches. :-P

[Robbob]

Originally Posted by jimgavey

Our shop, ask one of your drivers how much stone is in our yard. Also, about 10 min. up the road is Beach Rock, it overlooks the Barkhamsted Resevoir. Beautiful view, and some fun crawlin. Even SSS has quite a bit of stone around their yard, in the drainage ditches n embankments. Thats close enough for you to walk to.

Never even thought about going in SSS's lot lol. We'll have to hook up next week sometime after work.

[jimgavey]

Originally Posted by Robbob

Never even thought about going in SSS's lot lol. We'll have to hook up next week sometime after work.

I'm up for some after work practice next week. I usually have my crawler in my truck anyways. I'll give you a call at work.


So, did you do a drive thru the lot on your way to work the other day? I haven't been down there for a few months, have the weeds overgrown all the rocks? I'm sure we could find somewhere to go.

[stubs179]

I saw your dig servo mount in EeePee's thread. When you engage your front or rear dig does your tranny move back and forth a little? I mean, like 1mm or so.

[Robbob]

Originally Posted by stubs179

I saw your dig servo mount in EeePee's thread. When you engage your front or rear dig does your tranny move back and forth a little? I mean, like 1mm or so.

not that i noticed, its screwed to the skid and the servo is flush against the tray mount.
the link did want to twist a bit at times thats why i bent a styrene shift fork/guide.

havent noticed any problems yet.

[Robbob]

got some updated pics of my dig servo mount so figured i should start updating my thread lol.

v1.0






v2.0

didnt have any delrin laying around so grabbed some acrylic i had laying around from my computer mod days.

[davec]

The new servo mount looks really nice. Exactly the same idea as I had, except I would like to make mine a bolt together mount so I can get the servo a little lower and lined up a little better. Nice job.

[EeePee]

I didn't like your first one, I'll admit it.

But the second one is it! That's (damn near) perfect!

[Robbob]

Originally Posted by davec

The new servo mount looks really nice. Exactly the same idea as I had, except I would like to make mine a bolt together mount so I can get the servo a little lower and lined up a little better. Nice job.

Thanks. yeah im as low as i feel comfortable going, we get some pretty rough courses out here and my luck ill hang the servo at my last gate.

Originally Posted by EeePee

I didn't like your first one, I'll admit it.

But the second one is it! That's (damn near) perfect!

Thanks.

yeah the first was a 'will this work' the night before a point series first comp

what do you think would make it better? or change if it was yours?

[davec]

Yeah, I hear you. I was thinking just a touch lower, maybe 1/8" at most, just enough to get the linkage straight, but it might not work. I have a comp today, so I didn't change mine from the original yet. It works well as it is. After the comp I will work on trying to move it around some.

[EeePee]

Yeah little lower, which could be achieved with spacers between the servo and your plate, or with some machining time I guess. Anything to get the straightest shot possible. The collar on the linkage is already adding a side load being so tall.

The other one is your servo horn should be perpendicular to the linkage when in 4 wheel drive.

And now I'm wondering if there's a low profile mini servo.

And does your truck stretch passed 12.5" with those spacers? Is that why you asked me?

[Robbob]

Originally Posted by EeePee

Yeah little lower, which could be achieved with spacers between the servo and your plate, or with some machining time I guess. Anything to get the straightest shot possible. The collar on the linkage is already adding a side load being so tall.

The other one is your servo horn should be perpendicular to the linkage when in 4 wheel drive.

And now I'm wondering if there's a low profile mini servo.

And does your truck stretch passed 12.5" with those spacers? Is that why you asked me?

yeah im thinking maybe a nice delrin piece made and milled down in the middle section to help get the horn lower (think SWX skid plate). On my way up to the LHS to get some different ball ends to try and straighten the link out.


http://www.losipartshouse.com/servle...MG-cln-/Detail

47oz @6v enough?


Yeah that was why. I stretched past 12.5 with the front spacers on so I took them off but left the rears. with the 20mm limiters I hit right about the 12 3/8 mark now.

[Robbob]

Originally Posted by davec

Yeah, I hear you. I was thinking just a touch lower, maybe 1/8" at most, just enough to get the linkage straight, but it might not work. I have a comp today, so I didn't change mine from the original yet. It works well as it is. After the comp I will work on trying to move it around some.

Good Luck.

[Del Monte]

hmmmmm the plot thickens

I've seen a few guys running micro sized servos with good results. It really shouldn't take a lot of torque to operate the losi dig.

[EeePee]

Originally Posted by Robbob

(think SWX skid plate)

47oz @6v enough?

I hit right about the 12 3/8 mark now.

More or less exactly what I was thinking. Make two will ya? Really.

I don't know what's required to shift. I notice most mini servos are 30 mm tall. Micro servos are 20-25 mm tall. Ten mm is a lot. 6 mm isn't bad.

HiTec 65MG

Height: 0.94" (24mm)

30.55 oz-in (2.2 kg-cm) @ 6V

The Losi servo I use has 56 ounces and is 30 mm tall I believe, as is your 5245 HiTec.

[stubs179]

I think that dig servo mount is perfect!!!!!! Could you make three?

[Robbob]

small things ..... listening to it be mentioned about the dig springs figured id take a picture to show the stretch


Very little of the notorious clicking noise now when you shift while low to mid throttle for me. Solid shifts.

also got a new mount for the dig servo yesterday




mounted and drive line clearance



right tire up


left tire up


i mounted it both ways to see how the link would work with the servo mounted either way

horn farthest back - long link




horn forward - short link






everything fit well and the machining is very clean, the drive line clearance does look tight but there is clearance on articulation. i think the servo could be a bit more to the right, not much maybe 1mm more just to be sure it clears on rigs with no shock limiters and full articulation.

i used a brand new ball mount on the tranny side, mine had become rounded out and abused. with the link hooked up and factory ball ends and horns the link has an angle to the right still.


where as the long link doesnt


possibly moving the servo over that little bit more will help with this also.


for RCBros.com jumping on this to and bringing to LCC owners.

[chevellian]

Very cool idea, and very nicely done.
I vote for a delrin option.

[Robbob]

Originally Posted by chevellian

I vote for a delrin option.

for cosmetics reasons or weight?

dont know if it delrin would weigh any less ..... my original one is made out of acrylic

[EeePee]

Nice! Exactly what I was thinking! The long arm position is where it's at!