Smoke pump help
12-18-2020, 07:43 PM
#1
Smoke pump help
I'm not good with speed controllers, the pump is a Tamjets smoke pump, it was working just fine with the Futaba radio, now that I've switched to Jeti, first it did not run, I made it run today, I made a program using a sequencer to make the pump to work intermittent, on the first flight today it was working fine on the always on position then I switch to the intermittent position and it started to do so then it went to always on then I couldn't turn it off in any position of the three position switch, landed with it on and turned turned the engine off ( the pump was still on ) I had to unplug the batt to turn the pump off and if I reconnect the batt it runs even with the airplane off.
Is the speed controller cooked?
Tks.
Is the speed controller cooked?
Tks.
12-19-2020, 06:20 AM
#3
Thanks for second that.
Moving in to plan B, since this happened about a year ago with another TJ smoke pump, I will do the same by replacing the ESC with the one on the picture, the first one is working just fine with that HK ESC, I really want see the dashes and dots made out of smoke made by my Boomer and Turbo.
Moving in to plan B, since this happened about a year ago with another TJ smoke pump, I will do the same by replacing the ESC with the one on the picture, the first one is working just fine with that HK ESC, I really want see the dashes and dots made out of smoke made by my Boomer and Turbo.
Last edited by CARS II; 12-19-2020 at 06:25 AM.
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Dansy (12-19-2020)
12-20-2020, 01:54 PM
#4
I think that some of the smoke you were seeing at the time of failure was all of the magic blue smoke leaving either your sequencer and/or the ESC.
The switching on and off is hard on the ESC due to the start up surge every time the pump motor starts. You want an ESC that is rated at least 3 or 4 times what the full speed running amps WHILE pumping smoke fluid of the pump. Most ESC can handle 1 or even a few quick starts in a row, but continuous pulsing will cause an over heat since every start is an over current condition.
The switching on and off is hard on the ESC due to the start up surge every time the pump motor starts. You want an ESC that is rated at least 3 or 4 times what the full speed running amps WHILE pumping smoke fluid of the pump. Most ESC can handle 1 or even a few quick starts in a row, but continuous pulsing will cause an over heat since every start is an over current condition.
12-21-2020, 09:36 AM
#17
Leave the brake off.
The brake is to more quickly slow a heavy prop or if it is in a car that needs braking. The brake will make more heat.
If you can connect an amp meter that is capable of recording a peak to see what your pump pulls while starting up with long lines and fluid in it. That is the number that you ESC needs to handle to survive the sequencer.
The brake is to more quickly slow a heavy prop or if it is in a car that needs braking. The brake will make more heat.
If you can connect an amp meter that is capable of recording a peak to see what your pump pulls while starting up with long lines and fluid in it. That is the number that you ESC needs to handle to survive the sequencer.
