Tutorial SMC3 Arduino 3DOF Motor Driver and Windows Utilities

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Hi Pit, I'm using Arduino Uno R3, 2 Arduino IBT2, sensors Hall, 24V 400W 15A power supply and 2 wiper motors of 24V 70W (50rpm aprox). Where do you think is the problem? I'm using this system with Xsim some months and it works. Thank you.

@franccac Have you tried with PWMmax at 200 or more? Underneath that I think you really can not handle it.

Think of Simtools and SMC3 as two separate things until you get your head around it.

SMC3 simply takes any value from its serial input - valid values are 0 to 1023. It has no idea what is sending the data just getting values from 0-1023. If you set a "clip limit" of say 85 it will "clip" 85 off each end of that range. So any values less than 85 or greater than 1023-85 will be limitted to that range. If the motors still move past these limits from momentum then the feedback signals (also 0-1023 because its a 10bit ADC) will tell the software that and SMC3 will attempt to brake the motors by putting them in reverse while ever the "feedback" is less than 85 or greater than 1023-85.

Now the SMC3 "max limits" work in a similar way but only on the feedback signal. So say the "max limits" are set at 20 and the feedback signals go less than 20 or greater than 1023-20 then the motors will be shut-off for safety. But remember if the clip limits are setup and working well then hopefully the motors will be stopped and reversed back into the working range before they get to the "max limits" and get shut down.

All the above happens independently of simtools - remember I said SMC3 doesn't know what simtools is doing or what game is running or your axis settings are, its just getting position values that can be between 0 and 1023.

So Simtools then is responsible for sending values which by default are limitted to 0-1023 because you have setup the interface to 10bits for SMC3. Whether the output values actually range from 0-1023 will then depend on the axis setup and game output along with the tuning center setup etc.

@RufusDufus

So my question was the following the Simtools sends from 0 to 1023 that ok.

Already in the Arduino if I set my Clip to 100, then it does a

newvalue = Map (value, 0,1023,100,1023-100); would it be this?

My question was if this happened in the clip or max input, for your explanation I came to the conclusion is in the clip, I am sure?

EDIT:

I went searching the SMC code, I killed my doubts. Now I understand what you said about cutting the value.

if (Target1>InputClipMax1) { Target1=InputClipMax1; }
else if (Target1<InputClipMin1) { Target1=InputClipMin1; }

Now talking about adjusting the simtools, let's say that if I set the axis of the simtools to 100% it goes from 0 to 1023 so for example if I set a value for the clip of 200. and the simtools to send 100 I lose 100 steps ok? Is this a problem I can lose accuracy?

Should I work on the axis values so it does not exceed the maximum and minimum values defined in the SMC?

Yes I've try it, but it goes crazy, if you search in youtube "SMC3 2DOF wiper motor problem" from franccac23 user (yes it's me jaja) you could see an example (I still can not put links sorry). This night I will look again.

@franccac
I just saw the video, high chances of being a problem in the potentiometer, I think it is not well fixed or this problem, because when the potentiometer keeps changing without any reading stopped, the engine does not stop because it moves according to the value Of the potentiometer. Try increasing the deadzone value in the SMC program.

To see clearly in the video that when you hit the potentiometer varies and can not fix the value again by itself.

I have modified to this parameters (image) and moves okay, but only if I put some weight on the seat.

I think that the motors have some movement of the axle and the hall sensor detect this movement. I will try with LFS later, and if it works okay with me in the seat I will reforce the axle of the motors.

Thanks both, I will come with the result.

@franccac

"Deadzone This creates a hysteresis zone for the motor feedback If you need values greater than 1, you probably have too much “slack” in your mechanical setup."

I think you have to review the support of the motor and the sensors, deadzone 5 is enough, you will lose a lot of precision.

If you compare your old graphic with the current one you will notice how much noise you have in the green graphic potentiometer, ideally it will be noise-free with 0 or 1 deadzone.

@Joao Neto

I have tried growing deadzone, I put it to the maxim (20) and I do not see any diference, the motors moves out the axle to hall sensor... Is an internal problem of the motors. Also have some noise in the motors in standby, I will look this when solve first problem.

@Pit @Joao Neto Solved!
It was a problem of the wiper motor, I have explained in my rig thread, thanks for all.

https://www.xsimulator.net/community/threads/my-basic-2dof-by-franccac.10600/

G'day Rufus,

Would you be kind enough to mention in your documentation if it gets updated, that you use Pin 8 on the Arduino for internal mechanisms of your software and is unavailable. I was trying to piggy-back my ACS70028DH boards straight onto the Arduinos but not to be.


void TogglePin()
{
static int PinOut=0;
PinOut=1-PinOut;
digitalWrite(8, PinOut);
}

Cheers,

Hello, my simulation platform in LFS simulator auto shift when the vibration is very large, AC simulator is normal. The simulator is my problem set or two of G force simulation is not the same? (LFS simulator effect has a tuning is very low, "sway" 27%)

Thanks rufus work great. Following tutorials worked everything to perfection at the first attempts. Great sensitivity seems like a steep motor, perfect on all 3 channels.moster motion in configuration of 30 A, my video at the following link

Thanks rufus work great. Following tutorials worked everything to perfection at the first attempts. Great sensitivity seems like a steep motor, perfect on all 3 channels.moster motion in configuration of 30 A, my video at the following link

It's can use with Chinese Uno SMD board? My 1 boad can use SMC3 but Motor and pot not working.

My 2dof simulator works with a chinese arduino with SMC3 and goes great
This is the link I used

My old chinese board can run but new not run.

i have a question regarding limits

every now and then one of my motors stops working and a reset gets the sim working again

i am assuming the limit has been exceeded

my sim is designed so full rotation is possible without damaging the rig

is it possible to increase the limits or turn them off - so the motor does not stop working ?