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HelicopterRadio - Servo - Gyro - Gov - Batt › Anyone familiar with the Hitec DPC-10 Brushless Digital Servo Programmer?
04-11-2017 10:10 PM  4 months agoPost 1
EEngineer

Elite Veteran

TX

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Trying to adjust a Hitec HSB-9370TH cyclic servo's center and endpoints for use on the Henseleit TDR-II's linear drive system for the swashplate.

Using a JR921X Rx/JR12X Tx which apparently has slightly different pulse-widths than a HiTec radio system, according to HiTec "tech" support.

Unfortunately, the DPC-10 software operation manual....available on-line....is very vague in specific areas(LED illumination meaning, manual shows connection to RX bind port???, etc.)

And, most unfortunately, the tech support agent was of little detailed technical help....

BTW, servo NIB...DPC-10 NIB...JR921X Rx NIB, etc.

Logo 600SXs, 700XX, 800XX

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04-12-2017 02:31 AM  4 months agoPost 2
EEngineer

Elite Veteran

TX

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Limited success...after many frustrating hours...

DPC-10 connection wiring....to test the servo center and end point adjustment using your transmitter.....

A) Servo always connects to the DPC-10 servo port....whether "Basic" or "RC Mode" is used....as in the DPC-10 manual.

B) To set, for example, aileron center and EP's...connect the aileron port of your RX to the DPC-10 Rx/Bat port. The DPC-10 operation manual shows the DPC-10 Rx/Bat port connected to a Hitec Olympus 7 Rx's bind/data port.....go figure. And this not mentioned anywhere in the manual.

So, for the elevator servo, plug the DPC-10 into the Rx's elevator port, and so forth and so on.

Now everything's hooked up correctly.

Ensure that your TX is "bound" properly to your RX beforehand. Also, to avoid having a 2S batt. pack die in the middle of this, I used an external SBEC to apply 6V from a bench power supply.

Here's where it gets tricky.....

And, again is not mentioned anywhere in the manual....but after wasting time going through all the various permutations of what not to do...here's what to do...

C) You have exactly 32 seconds from the time you apply power to your RX(power up TX first beforehand) to do the following:

1) Wait for RX to indicate "bind"
2) Hit "connect" on the DPC-10 Menu
3) And click "RC Mode" on the DPC-10 Menu

Case A) After 32 seconds you didn't perform C) 1,2,3.... the dreaded "check servo connection" message appears on the DPC-10 Menu.......the RXD LED indicator on the DPC-10 will go blue....I guess to indicate that you screwed up and go back to the beginning.

Case B) Prior to 32 secs, you successfully did C) 1,2,3...the DPC-10 Menu "highlights" the RC Mode button and your aileron stick will move the servo.....and the "check connect" message won't appear....

The idea, verified by the tech support....under questioning by myself(not them offering the idea)....is to "toggle" between the "RC Mode" and parameter program mode to see if your adjustments are working as desired.

What is not explained in the DPC-10 manual, nor by tech support, is....if you "toggle" out of "RC Mode" to change a parameter....you have ~6 seconds only....to enter a parameter change "section" of the DPC-10 Menu....or you will get the "check servo connection" message....and you have to start all over....

Likewise, after changing a parameter and exiting that "section" with an "OK" click....you have ~6 secs. to hit the "Write All" button with "OK"...or you will get the "check" message.

If you screw up at this stage, start over again and hit the "EPA Reset" button within the EPA adjustment section....and start all over once again.

At this point, using a template that indicates servo center and the +/- 55 degree rotation endpoints that are needed for the TDR-II linear drive system on the swash and affixing a straight edge to the servo with masking tape to aid in adjustment precision.....I can get the HSB-9870TH servo adjusted using the DPC-10 S/W, but when I toggle to the "RC Mode" and wiggle the TX stick....it's as if I didn't do a thing at all....

Same thing, when I plug the servo directly into the RX and wiggle the TX stick.....

And it's hard to verbally describe all this concisely.

For now, I will concentrate on merely setting the correct servo center when connected to the RX after programming to see if what I did works.

Boy, this is so much fun....

to be continued....

Logo 600SXs, 700XX, 800XX

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04-12-2017 02:48 AM  4 months agoPost 3
Pistol_Pete

rrProfessor

Seffner, FL

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Sweet heli

Curious...

Cant you just do travel end points and sub trim for centering with Tx?

Some FBL you can do both as well.

~~Enjoying the hobby one flight at a time~~

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04-12-2017 04:31 AM  4 months agoPost 4
EEngineer

Elite Veteran

TX

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Yeah, it's a very nice heli....

The engineering quality of everything is the very best I've ever seen in helis.

An illustrated 110+ page manual describes exactly how to do what....precisely.

Has an adjustable main blade damper mechanism that is field adjustable in a minute or two.

I have tested what you mentioned with regards to TX subs and ep's....and the servo will do that....but...

Am using a Vbar FBL...and during setup, it's best to set subs to 0 and eps to 100% in the TX....because you calibrate your TX to each separate VBar.

You then use VBar "trim" to adjust things properly.

It's stated in the TDR-II manual written by Jan Henseleit that programmable servos should be used for max performance.

The TDR-II's LDS swash drive system requires the use of servos with Futaba output splines which fit the TDR-II's LDS pinion gears.

Which limits servo choices....Futaba or Hitec.

When I got on the TDR-II "list" about 1.5 years ago, I also bought servos(with programmer), blades, etc.....now I'm building it and have run into this obstacle....

The HSB-9370TH servo is great...fast, hi-torque, etc......but the DPC-10 Programmer has the crappiest S/W that I have seen.....and this is a brushless digital servo programmer...only for Hitec brushless servos.

It's like Win95 vs Win7...and that's a complement.....and I'm not even going to go into the Hitec "tech" support in this particular case of the DPC-10.

Now, I've learned Hitec has a DPC-11 programmer....for any Hitec digital servo...including brushless...so I ordered one yesterday when I learned of it....ETA manana or thurs....

Perhaps that S/W is more user friendly....

This stuff is not "rocket science" in todays world.

So, I'll generate my own manual to see if I can make it work until I get the DPC-11 Hitec servo programmer....

I didn't want to get "bogged down" in this kind of "minutia".....when all that needs to be done....verified by Jan Henseleit himself....is to program a dang servo to have +/-55 degrees of rotation from servo neutral.....and a precise orientation of servo center.

No big deal, right?....

BTW, when I purchased these servos, I called Hitec "tech" support to verify that what I am trying to do can indeed be accomplished, as these servos ain't cheap.

As in many cases, it's probably some "user" error that's not obvious....so being stubborn, I will generate my own "damn" manual....documenting as much as I can to see if I can stumble upon WTF is going on.

Feel free to offer any reasonable suggestions....but I was hoping someone had figured this out before....

Searched and searched but could find no YouTube vids using the DPC-10....perhaps there's a reason for that....

Logo 600SXs, 700XX, 800XX

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04-12-2017 06:41 AM  4 months agoPost 5
EEngineer

Elite Veteran

TX

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DPC-10 continued.....

Managed to adjust the servo center....but in the wrong direction when, after programming center, connecting directly to the R921X RX.

It's as if in DPC "RC Mode", it's backwards from when connected directly to the RX.....

As if the PWM from the DPC-10 unit to the servo has changed...like it's inverted from what the R921X puts out....when in the RC Mode.

I might have to put my O-scope on it to verify....and perhaps post O-scope traces to explain.....

This doesn't mean that an O-scope is needed to program the servo, but rather for me to understand WTF is going on.....so I can click the right buttons to center the servo.

to be continued.....

Logo 600SXs, 700XX, 800XX

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04-12-2017 07:45 PM  4 months agoPost 6
EEngineer

Elite Veteran

TX

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Just got the DPC-11.....

Let's see how this one works.....

Logo 600SXs, 700XX, 800XX

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04-14-2017 07:14 AM  4 months agoPost 7
EEngineer

Elite Veteran

TX

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The DPC-11 works....still has S/W timeouts....it's a PITA to get the servo eps just right.....

At least it has a servo factory default "file" for the HSB9370TH servo.

What sux is that they make a really good programmable servo.....and then provide a really crappy programming interface, including really crappy documentation.

WTF is up with that BS?

Thanks, "Career Point"....

Logo 600SXs, 700XX, 800XX

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