RE: Hitec Servo Programmer  
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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> RE: Hitec Servo Programmer
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RE: Hitec Servo Programmer - 10/24/2003 2:28:12 AM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline 		Ah yes... but with the programmer you have linearity, matched throw throughout the entire range, proportional response, no binding, et al. Without the programmer? Many troubles.

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VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to bob_nj)
       Post #: 51

A Worthy Adversary Indeed ! - 10/24/2003 5:03:10 AM   
bob_nj


 

Posts: 3472
Joined: 12/3/2001
From: Vineland, NJ, USA
Status: offline 		I need to call you on the carpet about the "linearity, matched throw throughout the entire range" scenario. In my feeble mind, we only have control over the ends and the centers. What happens in the middle (entire range) is often left to the linearity and linkage gods. More often than not the differences are negligible and not seen or noticed in those grey areas. Since we are not addressing a curve, what advantages are you proclaiming? This is more of a pump than a dig_bob

(in reply to Joe Hunt)
       Post #: 52

RE: A Worthy Adversary Indeed ! - 10/24/2003 5:57:23 AM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline
quote:

I need to call you on the carpet about the "linearity, matched throw throughout the entire range" scenario.


Hi Bob!

Well? You move that sub-trim off 0 and you're non-linear. Enter the programmer!

Have you ever had two elevator halfs that were matched with sub-trim at center and ATV at end points but did not match equally throughout the range of throw? Sub-trim.

You can solve some of the problems of not having a programmer by using Nelson type arms that are custom drilled to any location. But, the complexities of doing this right... and the lack of room for any adjustment... make it a tough proposition, too. Did I say, "Enter the programmer!" yet?

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VIDEO: http://www.ruddermayhem.com/aw-96inch-260.wmv
VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to bob_nj)
       Post #: 53

A Worthy Adversary Indeed ! - 10/24/2003 4:38:11 PM   
bob_nj


 

Posts: 3472
Joined: 12/3/2001
From: Vineland, NJ, USA
Status: offline 		Maybe it's a matter of symantics. When I think of a linear servo, I think of the old brick type servos with two moving arms that went back and forth. You lost no servo movement with them as opposed to our current arms that move in an arc. My fault

I am interested to know how you can rectify a situation where the neutrals and endpoints are ok, but the middles need work.

Thanks again_bob

(in reply to Joe Hunt)
       Post #: 54

RE: A Worthy Adversary Indeed ! - 10/27/2003 12:01:25 AM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline
quote:

I am interested to know how you can rectify a situation where the neutrals and endpoints are ok, but the middles need work.


Hi Bob!

Program the neutrals rather than move them with subtrim.

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VIDEO: http://www.ruddermayhem.com/aw-96inch-260.wmv
VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to bob_nj)
       Post #: 55

Duh, I Knew That... - 10/27/2003 1:28:02 AM   
bob_nj


 

Posts: 3472
Joined: 12/3/2001
From: Vineland, NJ, USA
Status: offline 		Thanks Joe! How's the weather out there? Winds were about a steady 20 here today, but the temps were in the low 70's. Got a couple of flights on the 40% 330 and headed home to watch the local football game and have a couple of beers. Take care_bob

(in reply to Joe Hunt)
       Post #: 56

RE: Duh, I Knew That... - 10/27/2003 2:31:10 AM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline 		Sounds like nice weather for this time of year in Jersey? It's nice and warm out here lately. Too warm down south in Los Angeles... major fires!

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VIDEO: http://www.ruddermayhem.com/aw-96inch-260.wmv
VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to bob_nj)
       Post #: 57

RE: Duh, I Knew That... - 10/27/2003 3:21:07 PM   
bob_nj


 

Posts: 3472
Joined: 12/3/2001
From: Vineland, NJ, USA
Status: offline 		It has been rather nice lately. I plan to go out tomorrow (10/28) for awhile. When I get home, I'm going to put a servo on my jig and test something that I've been thinking about since your post above. For some reason, in my feeble mind I remember testing this very thing some time ago with different results. I thought that if I used regular trim, the throws became non-linear so to speak, but when sub-trim is used that didn't happen. Isn't that the original thought behind using sub-trim? You were able to move the neutral without cutting off or changing the entire curve. I'll let you know. Have a good one_bob

(in reply to Joe Hunt)
       Post #: 58

RE: Hitec Servo Programmer - 10/27/2003 4:03:51 PM   
MustangFan



Posts: 586
Joined: 3/25/2003
From: Canton, MI, USA
Status: offline 		Joe Hunt

I've been following this topic and thinking about the setup procedure.
Particularly the 3 to 5 times for adjusting end points.

I believe we could get this down to two.

Try the following to see if it helps.

1.) Put your best guess in the programmer. ( Starting with 100 makes this easier)
2.) Measure the deflection generated ( degrees or inches)
3.) divide the deflection, by the number entered into the programmer ... this is your cal factor.
4.) divide the deflection desired by the cal factor. ( calculated programmer #
5.) Enter the Calculated # into the programmer. Should be right on if there is not a large offset in the neutral point or sub trim problems.

I use this technique in the calibration of transducers, and it works well.

I am very much interested in Hitec digitals, and am going to purchase the programmer and some servos in the "near" future, so I Hope this technique fills the bill in.

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(in reply to azhar)
       Post #: 59

RE: Hitec Servo Programmer - 10/27/2003 6:58:01 PM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline 		Hey Mustang!

Now that sounds like something I'd like to try! I'll let you know how it goes next time I program a plane (soon).

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VIDEO: http://www.ruddermayhem.com/aw-96inch-260.wmv
VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to MustangFan)
       Post #: 60

RE: Hitec Servo Programmer - 12/23/2003 2:35:16 AM   
Rotcivv17



Posts: 212
Joined: 8/4/2003
From: Caguas, PUERTO RICO (USA)
Status: offline 		Hey Joe, sorry I'm a little off-subject..but since ur checking this forum....
I'm from Puerto Rico and I'm a big big fan of yours, do u mind if I design a DOD sticker for my Extra? thanks
Victor

< Message edited by Rotcivv17 -- 12/23/2003 2:36:08 AM >

(in reply to Joe Hunt)
       Post #: 61

RE: Hitec Servo Programmer - 12/23/2003 4:38:57 AM   
Joe Hunt



Posts: 345
Joined: 6/19/2002
From: Newark, CA, USA
Status: offline
quote:

ORIGINAL: Rotcivv17

Hey Joe, sorry I'm a little off-subject..but since ur checking this forum....
I'm from Puerto Rico and I'm a big big fan of yours, do u mind if I design a DOD sticker for my Extra? thanks
Victor


I would be flattered... please send pics when you have it finished!

_____________________________

VIDEO: http://www.ruddermayhem.com/aw-96inch-260.wmv
VIDEO: http://www.ruddermayhem.com/aw-104inch_yak_04.wmv

(in reply to Rotcivv17)
       Post #: 62

RE: Hitec Servo Programmer - 12/29/2003 6:10:58 AM   
Ozmodeller


 

Posts: 37
Joined: 3/28/2003
From: Queensland, AUSTRALIA
Status: offline 		Thanks gents,

I originally posted this thread on 9/13/2003. The replies have both astounded me in that so many people were having trouble with this item and the apparent lack of response from the manufacturers regarding the servo programmer.

What is apparent is that some modellers out there are extremely inventive (Joe Hunt just to mention one), however should all this trouble modellers go to to work out how to use a very expensive piece of equipment (in Oz anyway) be really necessary. I believe it behooves manufacturers to ensure that they build equipment that is supplied with a little more than barely adequate instructions.

BTW, I am still having trouble working out the easiest way to use it despite all the assistance provided by modellers more knowledgeable than I. If someone out there were to write definitive instructions for this item and others (for example, the Triton charger) I am sure they would prove to be most popular.

Once again thanks to everyone who replied and all the best for the coming year.

Regards,

Peter

(in reply to Joe Hunt)
       Post #: 63

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Hitec/MultiPlex Radios- Ask Hitec Customer Service >> RE: Hitec Servo Programmer
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