Futaba M6 Conversion
Posted: 17 Oct 2021, 10:43
I've just started on another Futaba M6 open gimbal conversion, this one with a custom-designed encoder board dedicated to Futaba M4/M6 (Futaba FP-6EN and FP-6FN outside of the UK). The board was designed in KiCAD and uses my proven GTB encoder circuit schematic, but the board layout has been modified to fit the Futaba. In fact, using KiCAD (or other pcb software like Eagle or EasyEDA), once you have a proven circuit schematic, different custom shapes are quite straightforward and I've now got dedicated encoders on order for Pro Line, Sanwa Excellence, Fleet XP/FM (or PCM/Omega) and a design that should fit Micron, RCS and similar with a small badge to hide the LCD and menu switches.
So far I've removed the metal battery support so I can cut the hole for the LCD and menu switches, cut the holes for the magnets to hold the label on and all the other switches (rates, throttle cut etc), mounted the encoder and temporarily powered it up to make sure everything lines up OK.
The boards have been supplied by JLCPCB who fitted all the smd components. But the first board I assembled and fitted didn't work. After a few minutes investigation I found that the reverse protection MOSFET was missing, but the other 9 boards I'd ordered all had it fitted. I guess the smd placement machine had a mis-fire? I've simply fitted a small wire jumper to bridge where the MOSFET should have been.
The next step will be to wire all the joysticks and switches and also figure out where to fit a small Li-Po battery, a 450mA should fit to the right of the board. If I ever do a MK2 version of the encoder, I would lay out the PCB with everything except the LCD moved to the left leaving more room for larger batteries or Li-Ion or NiMH on the right (viewed from the back). I think this one will have a LemonRx DIY 2.4GHZ module, though I have more spare FrSky Rx, so a DHT may be fitted.
Mike
So far I've removed the metal battery support so I can cut the hole for the LCD and menu switches, cut the holes for the magnets to hold the label on and all the other switches (rates, throttle cut etc), mounted the encoder and temporarily powered it up to make sure everything lines up OK.
The boards have been supplied by JLCPCB who fitted all the smd components. But the first board I assembled and fitted didn't work. After a few minutes investigation I found that the reverse protection MOSFET was missing, but the other 9 boards I'd ordered all had it fitted. I guess the smd placement machine had a mis-fire? I've simply fitted a small wire jumper to bridge where the MOSFET should have been.
The next step will be to wire all the joysticks and switches and also figure out where to fit a small Li-Po battery, a 450mA should fit to the right of the board. If I ever do a MK2 version of the encoder, I would lay out the PCB with everything except the LCD moved to the left leaving more room for larger batteries or Li-Ion or NiMH on the right (viewed from the back). I think this one will have a LemonRx DIY 2.4GHZ module, though I have more spare FrSky Rx, so a DHT may be fitted.
Mike