Sanwa Gemini 2 question

[Chris Elworthy]

I have a Sanwa Gemini 2 40mhz radio. The default settings on the radio have the throttle and brake EPA's at 100% but this figure can be advanced upto 140%. Does this mean that this is regulating the power and if I was to increase my EPA's to the maximum 140% I would receive more top end speed and brake force?
Any advice would be great


Chris

[dpackster1980]

Nope, less. If I'm correct then default full throttle is 100% when you calibrated the esc so if you increased the EPA then you'd have more the throttle stick further to get full throttle but you can't as there isn't enough travel. Lowering the EPA means you'd fit full throttle sooner and brake sooner. You won't go any faster.

I used to own one, comfiest transmitter I ever owned. I wish I bought the new 2.4 instead of the Futaba 3GR. The Futaba feels cheap in comparison.

[Chris Elworthy]

Cheers for that mate I was just curious as I didn't feel I was getting enough brakes. I have a Speed Passion GT2 speedo and turned my brake power down to 75% as I felt 100% made the car unsettled. Problem is 75% doesn't seem quite enough now that's why I was wondering whether the radio wa preventing me from Achieving full brake.
I totally agree with you on the comfort front it's beautiful in hand. I recently returned to the hobby after 6 years away and picked up a Gemini to get me going. Back in the day I used to use a KO esprit 2 and it was nowhere near as comfortable as the Sanwa. I took a look at the 3gr but didnt like it so just stuck with 40mhz for now.
Good news though!! The Sanwa Gemini X (same as the Gemini 2 but 2.4ghz) is finally going to be available in GB soon! SMD will be the distributor and I've heard that they should retail around the £160 mark which ain't half bad.

Chris

[imull]

Sorry, but if you have calibrated at 100% and increase to 140% you won't notice any difference other than the speedo might complain (some are intelligent enough to know what the end points are and if the radio goes outside those points).

It works like this, your radio generates pulses, 1.5ms pulse with is neutral, 1ms is full brake and 2ms is full throttle and as you move the stick the pulse width changes in between these values.

If you go to 140% you will still generate 1.5ms wide pulse at neutral but the smallest and largest pulses will now be 0.8ms and 2.2ms respectively.

You only really need to 'overdrive' the steering servo to get more travel (sometimes) and it only works with digital servos.

Most speedos won't calibrate if the pulse width is outside the normal values.

Equally if you reduce the EPA you get less travel (throttle/brake) and as you state that 75% brake isn't enough then you need to find the sweet spot on your EPA, as you've told the radio not to produce full width brake pulses.

Apologies if this is teaching you to suck eggs

Ian