Former Member Posted May 15, 2016 Share Posted May 15, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Dave Hopkin Posted May 15, 2016 Share Posted May 15, 2016 sounds like the ESC Timing - can you plug the suspect ESC into your own working set up and see if the problem travels with the ESC or not? Quote Link to comment Share on other sites More sharing options...
Robin Etherton Posted May 15, 2016 Share Posted May 15, 2016 Waiting with interest to see if you find the answer to this one. I had a similar problem documented here earlier this year. One speed controller was giving over 40 amps and another only 30amps with a consequent power shortfall. Theoretically they were the same capacity. No amount of calibration, stick wiggling produced any worthwhile result other than bricking two controllers in my experimentation. Have now changed to a non contact clamp meter for measuring current. Never did find the answer. Used the speed controller which gave the full amps and got on with life. Expensive learning curve though. Good luck😳 Robin Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 15, 2016 Author Share Posted May 15, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Robin Etherton Posted May 15, 2016 Share Posted May 15, 2016 Nope!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Bill_B Posted May 15, 2016 Share Posted May 15, 2016 Switch on tranny, set throttle trim all the way back, put stick to max throttle, plug up battery/ESC, wait for a tone, set throttle back to minimum and it should work. Apologies if you've already tried this. Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 15, 2016 Share Posted May 15, 2016 The symptoms described sound like nothing to do with timing, they are what I'd expect if the ESC hadn't been calibrated with the Tx. Have you calibrated the ESC with the Tx stick travel ? It needs to be done when used for the first time or/and when a different Tx is used. Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 15, 2016 Author Share Posted May 15, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 15, 2016 Share Posted May 15, 2016 Tom, the ESC detects the full travel in one go when done as per instruction manual. Quote Link to comment Share on other sites More sharing options...
Andy48 Posted May 15, 2016 Share Posted May 15, 2016 Posted by Percy Verance on 15/05/2016 19:33:25: I kind of suspected a timing issue, but I'll happily admit my electric flight knowledge is somewhat limited. And of course just to twist the knife, the BL 20 ESC's fitted to the Easy Stars are not programmable with the Mpx Multimate I have...... It seems I'm consigned to wrestling with bleeps and the transmitter stick...... oh dear, there must be an easy way? Lesson number 1. An easier way. Find a good make of ESC, buy the card for it, and stick to that make when buying more ESCs. (sorry) Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 15, 2016 Author Share Posted May 15, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Dave Hopkin Posted May 15, 2016 Share Posted May 15, 2016 If the ESC makes the short burbling noise then goes to a series of single bleeps and nothing else its either that the RX isn't bound, the ESC doesnt have a signal from the ESC or its not been calibrated If the control surfaces work its been bound so thats easy to eliminate So before you get the lump hammer and 1" chisel to it, check over the ESC->RX servo lead plug for proper seating Other than that......... I dunno Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 15, 2016 Author Share Posted May 15, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 15, 2016 Share Posted May 15, 2016 Have you checked that the servo movement of the Tx is programmed to 100% both sides of neutral (you shouldn't have to as it's the default with Cockpit SX, or at least is with my 35meg one). Failing that can you bind it to your own Tx as a temp measure, re-calibrate & see if that makes any difference. Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 16, 2016 Author Share Posted May 16, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Robin Etherton Posted May 16, 2016 Share Posted May 16, 2016 Mmm! That's just what I ended up doing. Frustrating isn't it Robin Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted May 16, 2016 Share Posted May 16, 2016 Percy, just another thing to check is the lipo, if it's dropping volts under load the LVC might be cutting in and reducing the power. Have you tried a lipo you know is good? Quote Link to comment Share on other sites More sharing options...
Peter Beeney Posted May 16, 2016 Share Posted May 16, 2016 Is it worth just slipping the esc throttle lead into a spare channel, for power, and a servo into the throttle channel? This at least will visually prove full stick movement or otherwise. If ok, then extend the throttle travel beyond 100% in the tx and see if that has any effect… …or perhaps even reduce it, cannot do any harm. However, when I’ve pottered around with this in the past I did find that going too far over the top made the esc shut down altogether! Only just a thought… PB Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted May 16, 2016 Share Posted May 16, 2016 As you have two Easy Stars the most positive way would be to change over the ESC, motor, radio one at a time until the bad one behaved the same as the good one! It might not be easy but at least you would know exactly which bit was causing the problem. Edited By Simon Chaddock on 16/05/2016 14:58:46 Quote Link to comment Share on other sites More sharing options...
Trevor Posted May 16, 2016 Share Posted May 16, 2016 You can eliminate all transmitter and receiver related causes by simply connecting the ESC to a servo tester instead of to the receiver. Trevor Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 16, 2016 Author Share Posted May 16, 2016 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Robin Etherton Posted May 16, 2016 Share Posted May 16, 2016 Trevor Could you explain that one (about the servo tester ) in a little more detail please. Robin Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted May 16, 2016 Share Posted May 16, 2016 Robin Apologies for barging in but a picture tells many words. The ESC is providing the 5V to power the servo tester (red wire) which in turn provides a signal (white wire) to the ESC which then controls the motor speed according to the position of the servo tester knob. No radio link required. Edited By Simon Chaddock on 16/05/2016 18:52:53 Quote Link to comment Share on other sites More sharing options...
PatMc Posted May 16, 2016 Share Posted May 16, 2016 As a straw clutching last resort I was going to suggest listening & counting all the bleeps with the ESC in programming mode to see if that gave any clues, then I realised the last item in programming mode is a default reset. The default settings are probably what you'd choose for this model so if you haven't already done one I suggest trying that. Bear in mind that you may need to re-calibrate again after. If that doesn't do the trick wouldn't it be best to take it back to the retailer under warranty rather than get into surgery ? Quote Link to comment Share on other sites More sharing options...
Robin Etherton Posted May 16, 2016 Share Posted May 16, 2016 Simon Thanks for that . So what result would Percy expect to get from the suspect controller. Sorry to labour the point but this electricary stuff does my head in. Having only just last week bought a servo tester like the one in the picture I could try this myself. Robin Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.