RunRyder - Glitching on ccpm servos

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 431 ONLINE 20 EVENTS SEARCH REGISTER START HERE

1 page

256 views

POST REPLY

Midland Helicopters	.	HeliProz	.	ZoomsHobbies
	.		.

Radio - JR & Spektrum DSM > Glitching on ccpm servos

Nuts&Bolts
Heliman
Location: Andorra

Hello, am i the only one getting fast small glitches on the ciclic servos on DX7.

It has already happened to 2 of us at our field.

I tought it was the receiver or the servos, i changed both (R7000 )but problem still there.

Helis are both electric, one is a trex 450 the other a Lepton.

04-23-2007 Over year old.

Wingman77
Elite Veteran
Location: Pulaski TN US

I dono but what is your rx voltage?

04-23-2007 Over year old.

Nuts&Bolts
Heliman
Location: Andorra

Rx power comes from the esc of a kontronik jazz 80-6-18, and it does it with a freshly charged pack.

04-23-2007 Over year old.

Paul Beard
Senior Heliman
Location: San Jose CA

The peak power is higher with the AR7000 on the cyclic servos because the servo pulses are next to each other. Try an RX pack instead of the Jazz BEC to see if it helps.

Paul

04-23-2007 Over year old.

HOMEPAGE

Nuts&Bolts
Heliman
Location: Andorra

The thing is that using a rx pack on a trex 450 is not very useful. I swapped out the 7000 and put a 146iP in and problem gone.
I tought T14MZ was using near pulses on ciclic too.

Paul are you saying the the esc is the problem? Kontronik jazz 80-6-18 bec is rated at 4Amp.

04-23-2007 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

> I tought T14MZ was using near pulses on ciclic too.

Not when using a PCM or PPM rx.

- John

MSH Protos

04-24-2007 Over year old.

Nuts&Bolts
Heliman
Location: Andorra

So the reason for ciclic glitches is that the 4amp bec of the kontronik can't keep up with 3 x HS56? (i tested the jazz 80 in the rex 450 today and same problem).

04-24-2007 Over year old.

JKos
Elite Veteran
Location: City of California in the state of Maryland

For some reason certain combinations of BECs, receivers, and servos have problems like this. For example, an Airtronics PCM receiver plus a UBEC or Medusa Research BEC will result in servo glitches (regardless of type of servo) when the servos are unloaded. But load just one to cause a bit more constant load on the BEC and it works fine.

It has to do not with the average and peak current capability of the BEC, but the switching nature and its interaction with all things electronic. Obviously not all combinations have problems. Just very specific combinations.

Does the problem continue if you load a servo?

- John

MSH Protos

04-24-2007 Over year old.

Nuts&Bolts
Heliman
Location: Andorra

yes, actually it glitches only in flight, i can clearly se one servo jump.

04-24-2007 Over year old.

1 page

256 views

POST REPLY

HeliHobby	.	Ron’s HeliProz South	.	Century Helicopter
	.		.

Radio - JR & Spektrum DSM > Glitching on ccpm servos

PRINT TOPIC

Advertisers

Subscribe to This Topic