Ccpm Interaction?

[Ashley Davis]

Well not so cool, as usual you are encouraging me to spend money my bank manager doesn't want me to spend

only worth spending if you have a problem in the first place, if your setup is already good or you don't notice issues in flight then save your money.

My machine has the hitec 6965s the same as Chris and the centering is pretty poo and they don't travel quite the same. Bloody fast but not very accurate, so the cyclock was a good way to get bloody fast AND more accurate (nothing can fix bad centering). However, now there are some very good JR servos out that are just as fast and far more accurate (DS8717) so they might go on the Xmas list.

[mchristyuk]

Ashley,

I did go to the CSM site and it clearly states that it sends 4800 bit resolution data to the servos. Which is a good degree higher than anything it will get fed in.. so it is future proofed for future higher resolution systems.. but it is still upsampling.

However the issue Chris was having, if it was not with a faulty servo, could easily be fixed for free without a Cyclock. Having removed all the interaction on the ground Chris stated that it was not flying well.. Therefore there must be something more serious wrong.

All I am trying to do is help somebody fix a problem they have without having to throw money at it if they don't need to. Say he bought the Cyclock removed the interaction AGAIN.. and STILL had the same problem and had to go and buy new servos.. then he would have spent £200 on a £150 problem.

I am not here trying to sell anything or promote any companies.. I am here trying to give Chris some friendly impartial advice that will cost him absolutely nothing.

It is also a 15 minute job to get a CCPM setup running on a DX7 without any noticeable interaction. If it is taking you hours upon hours may I suggest you go back and do some studying yourself?

I'm not here trying to have an argument with you, just trying to help Chris without automatically telling him to go and by some product that could be of absolutely no benefit.

If my car starts pulling to one side I'd go and check the pressure in the tyres before buying a new tyre..

Now please... PEACE OUT!...

Mark

[Ashley Davis]

cyclock would even it out all the way through the range?

The cyclock does a better job than ATVs as you can make much finer adjustments due to the higher resolution it gives you, so one click on the cylock is a much smaller amount than one click on a standard tx ATV.....plus you can alter the mid point as well as both ends, so you get a smoother movement through the range overall.

[Ashley Davis]

Mark, what annoyed me was your post was misleading. The cyclock does provide much better servo resolution over a tx using CCPM mixing, to say it doesn't is clearly incorrect. The fact it can upsample to 4800 is just future proofing for when tx can do that, however, it still provides full tx resolution where in-tx mixing clearly does not.

As it is significantly higher resolution any point adjustments on the cyclock are much finer than using ATVs making fine tuning muh easier.

No offence meant, it just wasn't correct and looked like the product was being put down when in actual fact it is a marvelous piece of technical wizadry and far surpasses our current tx capabilities when doing CCPM mixing.

Even if he bought the cyclock and the problem returned he would still have much better servo resolution....even if he bought new servos he would still get better servo resolution afterwards, electronic phase correction and built in electronic cyclic ring. Plus the cyclock approach to CCPM setup is simple to follow and demystifies the process for a beginner.

Personally I'd rather spend £50 before I spent £150 and even if it didn't work I'd still have the other benefits that my £50 bought.

[Ashley Davis]

that said I don't think we actually got to the bottom of what was wrong before Chris bought new servos (secretly I think he had a hankering for new servos, I can see him now showing his Mrs the post about his servos being buggered "you see honey, they all say I need new ones, it will crash and cost us even more if I don't buy them now")

[mchristyuk]

To be fair.. I've had quite some experiences with Hitec servos.. and he has done the right thing

Mark

[Ashley Davis]

Hitecs 6965s are fast but I got to agree, they don't do centering and the overall travel can be a touch different servo to servo, CCPM setup is a lot easier with decent Futabas or JRs.

[ChrisB]

I think i have found the problem,and it may be the Align servo horns moving on the splines under load,if i power it up and grab hold of the servo horns and twist them one is solid and the servo holds its position but two have a fair amount of movement,its either the horns or the servos,

I am gonna eat food now then try some Hitec horns on the splines,,

Mr Models has leant me his Hitec programmer so i am gonna run thru them later

[ChrisB]

One other thing to check - you *have* turned the expo function on in the swashplate mix menu, haven't you?

This is intended to correct for the non-linearity issues created by using a rotary servo output when you really need a linear one. And it does a pretty fair job of it!

Its one of those silly little settings that's easily overlooked, but it can make a world of difference to the way a model handles......

Of course, if you really have got a servo on the way out, it won't help, but it may just be your problem. Certainly worth checking, anyway!

--
Pete

Swash expo was inhibited on the dx7

[ChrisB]

Nice one, what could have been resolved for £50 is resolved for £150. Let's all go buy new servos till we find three that match

I need some servos for a Rappy anyway so it is not money wasted

[ChrisB]

that said I don't think we actually got to the bottom of what was wrong before Chris bought new servos (secretly I think he had a hankering for new servos, I can see him now showing his Mrs the post about his servos being buggered "you see honey, they all say I need new ones, it will crash and cost us even more if I don't buy them now")

Ashley

You are not far from the truth there

[Arky]

Chris it could be your 9x needs the channels recalibrating i had to do this on mine to get all the servos end points right.

could show u how, but its top secret so i will have to kill u afterwards

It's crude but have a look at the channel monitor on your radio and see if the sliders stop in the same places. then increase them all to 150% and see if thay max out on the monitor, heli off

jason

[Arky]

erm just had a thought your on dx7 now arnt ya ? i'll get me coat

[Ade_Law]

same could still be true tho.....

Ade

[ChrisB]

Need new servos i reckon,they are mismatched basically,,gonna renew them all and cyclock it afterwards if needed...


Jason

Tx channel graphs show the same