Jay77 9 Posted July 6, 2020 Hello all, So, I finally got my Lunchie running with a GoolRC motor and ESC, but I’m having trouble with the stutter. It does eventually go, but the delay between forward and reverse is taking the fun out of driving it. Video below... Any advice? Jay Share this post Link to post Share on other sites
Mark_C 198 Posted July 6, 2020 Back in the day (christ I sound old..) you'd get that sort of stutter with radio interference, sometimes low battery in the transmitter etc. Have you run this transmitter/receiver with another ESC and found it to be ok ? Does the ESC have a throttle alignment in setup you could try ? I was thinking of getting a goolrc set, but this sort of thing and the picture of a very similar unit that caught fire is kind of putting me off.. Aisde from all that tell us more about the lights setup you've got ther, they look pretty good ? Share this post Link to post Share on other sites
Jonathon Gillham 4595 Posted July 7, 2020 Thats a sensorless setup isn't it? It looks like cogging, but thats the worst I've ever seen. Sensorless can often have a little delay which behaves like that but that to me looks faulty as its taking too long to get going. It appears that the ESC is getting signal as its trying to move too so unlikely to be the rx or tx, and it isn't behaving like a flat battery. Have you had that setup in any other cars or is this new? Share this post Link to post Share on other sites
mtbkym01 3946 Posted July 7, 2020 Yep certainly looks like cogging, you could try hard wiring the esc and motor to remove any resistance in the plugs Share this post Link to post Share on other sites
KEV THE REV 2304 Posted July 7, 2020 I've just fitted a 3650 60A Gool motor and ESC into a Lunchie , and it is sharp off the mark even with a NiMh battery and responds well to foreward , reverse , brake etc . It is much faster than the 15T motor I took out of it . I hope you get yours sorted Share this post Link to post Share on other sites
Falcon#5 594 Posted July 7, 2020 Have you tried swapping 2 of the ESC to motor wires around? Share this post Link to post Share on other sites
IoWBasher 170 Posted July 7, 2020 Have you calibrated the esc ? Also what battery are you using. If you're using a Nimh or Ni-cad pack then it might not be able to supply the amperage needed on startup Share this post Link to post Share on other sites
skinned 134 Posted July 7, 2020 Sounds like a bad sensor wire to me...or....no sensor wire Share this post Link to post Share on other sites
Silver-Can 402 Posted July 7, 2020 I would also guess that it is cogging. I would also check your wiring too as a little cogging at low speed is to be expected with sensorless - but as others have said, that is way more than normal. I had a similar issue with a different sensorless setup and it was where my dodgy soldering had let me down. Basically I had only soldered half of the motor wire onto the connector connecting it to the ESC. Resoldered and worked fine after. Just a thought. Share this post Link to post Share on other sites
Wooders28 4703 Posted July 7, 2020 Looks a bit extreme. Was that light throttle, or straight to full? This was the only time I've managed to catch my 4300kv Goolrc cogging. Running 3s, straight to full throttle. Share this post Link to post Share on other sites
nowinaminute 2813 Posted July 8, 2020 Seems like cogging but I've never seen anything that bad from such a combo, especially with the short gearing of the lunchbox. If I had to guess, I would say either there is a hardware problem or a bad connection somewhere along the way. Even when I run a tiny 380 size motor in my Lunchbox it only really cogs if I try to make a creeping start uphill or something, otherwise it's very responsive. A full fat 540 brushless should have no problems shifting this even without a sensor. Share this post Link to post Share on other sites
wolfdogstinkus 1876 Posted July 8, 2020 The only time I've seen stuttering that bad was a loose motor connection but then the motor wouldn't run at all, it just stuttered until the connection was properly soldered. 1 Share this post Link to post Share on other sites