by Allan Warner » Wed Aug 25, 2010 12:33 am
Hi,
I've re posted this, with some editing and additional info, from another thread as this is a more suitable location.
I'm not happy. I purchased a telemetry Tx and rx set plus additional normal 8ch rx(has a 'HV' label on side of case). Used it in my Futaba FF8, rx battery A123 cells or NiMh . Using either rx the system has a distinct dislike for certain servos by causing a very pronounced cogging/notchy movement instead of a smooth movement of the servo o/p disc in response to the tx stick movement. There was no jitter at neutral or steady stick position. I would not fly using the first 3 listed as it would be like having a sticky/binding control. Although, having read this thread, it may be that 3D style of flying, banging the sticks about, may be be less noticable.
Servos not liked:
1/ futaba S3001
2/ futaba S3004
3/ futaba S3010
4/ supertec naro hp
5/ gws pico
6/ ripmax sd200
7/dimond d250
8/ hitec hs50
9/ towardpro mg996r(digi) - slight cogging
seamed to work OK with the following:
1/hitec hs 60
2/hitec hs 645
3/ hitec hs 5645(digi)
4/ savox sc-0251(digi) Had a much higher whine than normal
5/ power hd 9150(digi)
6/ futaba s9001
7/ futaba fd30m(old but unused/plug changed to fit)
I gave up at this point even though there were more servos to try. All the servos were new. They work fine on other systems (2.4 Spektrum and on 35 - futaba, hitec, gws, jeti) with either power supplies. It was on all 4 primary channels(didn't see the point in checking further).
Is this a hardware fault/software fault or a design fault. Either way it's not fit for purpose IMO. I paid a total of UK£80 for these items and if the issue cannot be resolved or I get a refund then their in the bin. There's something not right and I am not prepared to risk a large'ish plane or an injury to someone. Anyhow, I suspect my BMFA insurance maybe invalide, if I did fly, as I am responsible for ensuring that it is safe to fly and there is some doubt.
I've posted a version of this on the Giantcod(the sellers) forum and hopefully I'll get a definitive answer from somewhere.