RCCrawler Forums

slashbasher · 01-25-2010, 10:37 PM

I have a hitec 645 working the disconnect on my R2 trans and it has to much throw and puts the disconnect shaft in a bind and it don't want to go back in gear all the way. I have tried using different lenght servo arms with no luck. I have a shorter arm on right now and it seemed to help a little. I need a servo with very little throw if anyone makes one. When I go to disconnect the trans the linkage pushes downward on the disconnect shaft and puts in a serious bind. It should move in and out smoothly and straight in and out ,but instead it puts pressure on the disconnect shaft and pushes it downward. Any help with this would be greatly appreciated. Thanks.

AlphaQup · 01-25-2010, 10:58 PM

Just use a radio with end point adjustment and be done with it

2JSC · 01-25-2010, 11:00 PM

Get a radio where you can adjust the endpoints.

slashbasher · 01-25-2010, 11:11 PM

Quote:

Originally Posted by 2JSC

Get a radio where you can adjust the endpoints.

I am running a TQ3 and it has the adjustment on the back of the radio for the 3rd channel, but how will that help? Isn't that just a trim adjustment for the 3rd channel? Is that the same as endpoint adjustments?

2JSC · 01-25-2010, 11:16 PM

Endpoints are digital. Trim is just adjusting the frequency, which what the TQ3's adjustments are.

PDXFNG · 01-26-2010, 12:16 AM

read the tq3 mod thread. You can install some adjustment pots to limit the travel.

RIG_RIDER · 01-26-2010, 12:22 AM

Here ya go:
My Modded TQ3 Update - Added EPA pots

It's some good info on modding your TQ3.

crawler-c · 01-26-2010, 02:08 AM

if you dont fancy modding your radio, have a look at this..

http://www.servocity.com/html/180o_servo_stretcher.html

Captaincrash · 01-26-2010, 04:49 AM

I just bought a 3pm-mx because my old radio was lacking adjustment.....best $180 I have spent!!!

Manning · 01-26-2010, 05:14 AM

Quote:

Originally Posted by crawler-c

if you dont fancy modding your radio, have a look at this..

http://www.servocity.com/html/180o_servo_stretcher.html

What I was going to suggest. They work well.

Narly1 · 01-26-2010, 07:13 AM

Or buy a Hitec programmable digital servo and using one of their servo programmers, reconfigure the endpoints to achieve reduced throw.

You might be able to get your LHS to do the programming for you no charge.

Narly1

engineerjoe · 01-26-2010, 08:15 AM

another simple option is to use a shorter servo arm.

slashbasher · 01-27-2010, 02:14 PM

Quote:

Originally Posted by engineerjoe

another simple option is to use a shorter servo arm.

That was the first thing I tried and it did help a little, but it didn't solve my problem. I ended up using a round servo arm which was the shortest available.

solomon7 · 01-27-2010, 04:08 PM

instead of a solid link, use some shift linkage from a nitro as the connecting arm. The springs will let the arm go farther than needed.
Here's my old dig setup, when I didn't have EPA's just a 645, shift linkage, and some collars. Home fabbed since this was before everyone could buy one.

You can use pen springs if needed to adjust tension. I used this dig for a whole season with no probs at all. The springs also let everything line up before tension is fully applied.

01-25-2010, 10:37 PM	#1
slashbasher Quarry Creeper Join Date: Apr 2009 Location: columbus Posts: 218	does anyone make a servo with less throw? I have a hitec 645 working the disconnect on my R2 trans and it has to much throw and puts the disconnect shaft in a bind and it don't want to go back in gear all the way. I have tried using different lenght servo arms with no luck. I have a shorter arm on right now and it seemed to help a little. I need a servo with very little throw if anyone makes one. When I go to disconnect the trans the linkage pushes downward on the disconnect shaft and puts in a serious bind. It should move in and out smoothly and straight in and out ,but instead it puts pressure on the disconnect shaft and pushes it downward. Any help with this would be greatly appreciated. Thanks.

01-25-2010, 10:58 PM	#2
AlphaQup Quarry Creeper Join Date: Sep 2009 Location: Concord Posts: 215	Just use a radio with end point adjustment and be done with it

01-25-2010, 11:00 PM	#3
2JSC I wanna be Dave Join Date: May 2006 Location: FOUR 8 OH Posts: 4,913	Get a radio where you can adjust the endpoints.

01-25-2010, 11:16 PM	#5
2JSC I wanna be Dave Join Date: May 2006 Location: FOUR 8 OH Posts: 4,913	Endpoints are digital. Trim is just adjusting the frequency, which what the TQ3's adjustments are.

01-26-2010, 12:16 AM	#6
PDXFNG Pebble Pounder Join Date: Apr 2009 Location: Gresham Posts: 185	read the tq3 mod thread. You can install some adjustment pots to limit the travel.

01-26-2010, 12:22 AM	#7
RIG_RIDER Rock Crawler Join Date: May 2009 Location: Medford, Oregon Posts: 692	Here ya go: My Modded TQ3 Update - Added EPA pots It's some good info on modding your TQ3.

01-26-2010, 02:08 AM	#8
crawler-c Rock Stacker Join Date: Nov 2009 Location: Europe Posts: 53	if you dont fancy modding your radio, have a look at this.. http://www.servocity.com/html/180o_servo_stretcher.html

01-26-2010, 04:49 AM	#9
Captaincrash Quarry Creeper Join Date: May 2008 Location: Ontario, Canada Posts: 376	I just bought a 3pm-mx because my old radio was lacking adjustment.....best $180 I have spent!!!

01-26-2010, 07:13 AM	#11
Narly1 Quarry Creeper Join Date: Jul 2008 Location: Erin, Ontario, CANADA Posts: 471	Or buy a Hitec programmable digital servo and using one of their servo programmers, reconfigure the endpoints to achieve reduced throw. You might be able to get your LHS to do the programming for you no charge. Narly1

01-26-2010, 08:15 AM	#12
engineerjoe Rock Crawler Join Date: Jan 2006 Location: SUPERMOTO heaven Posts: 695	another simple option is to use a shorter servo arm.

01-27-2010, 04:08 PM	#14
solomon7 Rock Crawler Join Date: Jul 2007 Location: Portland,OR Posts: 888	instead of a solid link, use some shift linkage from a nitro as the connecting arm. The springs will let the arm go farther than needed. Here's my old dig setup, when I didn't have EPA's just a 645, shift linkage, and some collars. Home fabbed since this was before everyone could buy one. You can use pen springs if needed to adjust tension. I used this dig for a whole season with no probs at all. The springs also let everything line up before tension is fully applied.

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