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glassdoctor · 11.14.2006, 12:54 PM

The glitch BrianG describes doesn't sound like the same issue I have seen.

Here's the issue we are having while racing:

This is in 1/10 offroad buggy, 4wd, and truck, running good 6 cell packs, forward only or reverse lockout, two different high end radio systems, five different cars and rx's, differnet electronics layouts, two different drivers, etc etc etc

It appears as if the MM can "misfire" in certain situations, when there is just a small amount of throttle input. What happens to us is when coming through a sweeper we let off the throttle and let the car coast a bit (with the drag brake activated) and then gently roll back on throttle.... sometimes the car will "glitch": the rear wheels lock up just for a split second and then back on power. We belive what is happening is that the MM gets a misreading on the rotor position/direction and it "fires" backwards once... then immediately goes back to the correct sequence. It is just enough to make the car loop out sideways... just like a quick stab of the brakes in the middle of a turn.

This happens to me about once per race on average... sometimes I have seen it several times in one race. I didn't notice the problem until I started racing on the smooth indoor tracks recently, where this behavior is obviously not just a bump or rut in the track messing with the car.....

We have the brakes dialed way out... the brakes are not strong enough to even make the car do what it does. And we have the drag brake set to around 30%... pretty strong... so we only need a little more brake available when we want it.

Setting the exponential on the radio to "soften" initial throttle response seems to make the problem worse, as well as setting the drake brag higher may make it happen more.

Castle's response so far is that they are blaming the connectors... they said that one guy reported a similar issue and that the problem went away when he direct soldered the motor. They think possibly the very small low voltage pulses that the MM uses to get info from the motor may not "like" the connectors. I tried putting a little solder "jumper" on my connectors to see if that would help and my buddy replaced his connectors with Corally style gold plugs that are similar to the 4mm stock ones but are a different (we think superior) design and quality. But we still see the issue.

This week I plan to direct solder my motor and see what happens.

	(#15)
glassdoctor TEAM FUSION Offline Posts: 2,041 Join Date: Jul 2006 Location: Iowa... Hawkeye country	11.14.2006, 12:54 PM The glitch BrianG describes doesn't sound like the same issue I have seen. Here's the issue we are having while racing: This is in 1/10 offroad buggy, 4wd, and truck, running good 6 cell packs, forward only or reverse lockout, two different high end radio systems, five different cars and rx's, differnet electronics layouts, two different drivers, etc etc etc It appears as if the MM can "misfire" in certain situations, when there is just a small amount of throttle input. What happens to us is when coming through a sweeper we let off the throttle and let the car coast a bit (with the drag brake activated) and then gently roll back on throttle.... sometimes the car will "glitch": the rear wheels lock up just for a split second and then back on power. We belive what is happening is that the MM gets a misreading on the rotor position/direction and it "fires" backwards once... then immediately goes back to the correct sequence. It is just enough to make the car loop out sideways... just like a quick stab of the brakes in the middle of a turn. This happens to me about once per race on average... sometimes I have seen it several times in one race. I didn't notice the problem until I started racing on the smooth indoor tracks recently, where this behavior is obviously not just a bump or rut in the track messing with the car..... We have the brakes dialed way out... the brakes are not strong enough to even make the car do what it does. And we have the drag brake set to around 30%... pretty strong... so we only need a little more brake available when we want it. Setting the exponential on the radio to "soften" initial throttle response seems to make the problem worse, as well as setting the drake brag higher may make it happen more. Castle's response so far is that they are blaming the connectors... they said that one guy reported a similar issue and that the problem went away when he direct soldered the motor. They think possibly the very small low voltage pulses that the MM uses to get info from the motor may not "like" the connectors. I tried putting a little solder "jumper" on my connectors to see if that would help and my buddy replaced his connectors with Corally style gold plugs that are similar to the 4mm stock ones but are a different (we think superior) design and quality. But we still see the issue. This week I plan to direct solder my motor and see what happens.