Servo Programmer...best $50 I ever spent

[CRAWLER-DAD]

Just purchased the Hitec HPP-21+ and it has to be the BEST $50 bucks I ever spent in this hobby. Many years I have battled the servo throw in search of MAX steering....I have finally achieved MAX steering without using an oversized servo arm. Hitec servos come with a factory default of 100 degrees, with this programmer I have been able to adjust the throw to 180 degrees..

BEFORE the programmer...
4pk with Hitec 7950
EPA 120 max both right and left

AFTER the programmer
4pk with Hitec 7950
EPA 65 right 70 left
with more throw than I know what to do with

Setting a Hitec Digital Servo to 180° travel - YouTube
check out this video

[Calderwood]

Originally Posted by CRAWLER-DAD

EPA 65 right 70

Sounds like your horn is still too long. Any EPA setting that is less than the max (or as close as you can get) is wasting torque.

[CRAWLER-DAD]

Originally Posted by nigels_world

Sounds like your horn is still too long. Any EPA setting that is less than the max (or as close as you can get) is wasting torque.

using a robtronic RED servo arm(just like the masses)
I will be trying smaller clamping arm soon..but really this is a huge break thru for me in gaining throw..posted this for all the others that have been frustrated with the FACTORY throw from Hitec

[Calderwood]

Originally Posted by CRAWLER-DAD

using a robtronic RED servo arm(just like the masses)
I will be trying smaller clamping arm soon..but really this is a huge break thru for me in gaining throw..posted this for all the others that have been frustrated with the FACTORY throw from Hitec

[DustyAz]

CRAWLER-DAD was kind enough to program some servos for me this morning. All I can say is WOW!! Simply amazing. The programming took less than five minutes. Finally I can max out those Dlux shafts! Thanks for figuring this out.

[The Violator]

Originally Posted by nigels_world

Sounds like your horn is still too long. Any EPA setting that is less than the max (or as close as you can get) is wasting torque.

Because of the swing of the arm, you lose so much travel at the end of the range, using the center of the travel is much easier to set up. Unless your arm pivots in very similar arcs as the knuckles ( 86 jeep on a berg, IMO is the best example I can think of ) you risk having your servo go past center and not be able to get back.

Although I agree with the idea of using all the throw available, it is not always easy, or even practical.


At least that my 2 cents.

[Erik D_lux]

I agree, the programmer has made life easier fo sho.

Do yourself a favor and ditch the clamping horn. You can get a simple Hi Tec horn or a Air Wild horn and they are stronger and lighter.

[z50king]

How far are you taking the throw? You lose movement and torque, force at a rod end, near the end points that far out.

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