Quote:
Originally Posted by Randy p
It's entirely possible that the spektrum is hopping channels. Any 2.4 system can do this, some do it more than others. If it's on a constant basis something is going on.
Try unplugging everything else in the receiver and see if anything changes.
also try another radio channel and let me know what it does.
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Randy,
Tried a few tests last night:
1. Everything unplugged from the receiver except the RS obviously. Neutral sequence as described previously, alternating between LED 4 then all 7 flashing about every two seconds. I then ran a make shift "response time" test where I pushed the throttle from neutral to full and then released back to neutral as quickly as possible and noted the response at the wheels and motor tone. I did this on the bench with the wheels off the ground. Over a sample of 30 starts the response ranged from high speed at the wheels through a jolt at the wheels but not much more to nothing, i.e. stick to full travel and back to neutral without the RS / motor responding at all. Of 30 starts about 5 or 6 show no response to this test, no obvious pattern to the responses. I also repeated this test using a different channel on the receiver with exactly the same results.
2. I then hooked the RS up to an old Futaba 27MHz system (more than 25 years old!) and repeated the above. After calibrating the start up sequence does not show the 7 flashing LED's just LED 4 then LED 1 repeating. The response test was a good deal better, with no starts missed in 30 samples. There did appear to be some variation in the amount of response but we must accept that it is impossible to be 100% accurate with the manual transmitter input speed and duration.
3. I then moved to my buggy with a GTB Spread Spectrum ESC and using the same Spektrum DX6i transmitter but a different (AR500) receiver. Repeating the 30 starts response time test showed an instant response every time to the point where I was reluctant to go as far as full throttle as the wheel speed gets pretty high even with a very short blip.
4. I did the buggy test again using the 27MHz system with exactly the same instant response (no varition apparent), to all 30 starts as test 3 above.
From these tests I have so far concluded that the majority of the hesitation problem lies with the relationship between the RS and the Spektrum set. I will try some more tests tonight, time permitting with a different motor on the RS as I obviously can’t be sure if the delay is with the ESC responding to the RX or the motor responding to the ESC. I may also run the test with an LRP Stock Spec ESC and the Spektrum but as I never previously noticed any delay with that combination I do not expect to see the problem.
Is there anything else I should try with the RS, any settings that may affect this hesitation problem? If I can’t find a solution then it looks like I’m stuck with getting rid of the RS or buying a new radio set neither of which is very attractive.
Nick