Tutorial SMC3 Arduino 3DOF Motor Driver and Windows Utilities

Hi All,

I just installed simtools V2, but the old settings not working with the system anymore.
I tried to set the same interface settings as with 1.3.
Did anyone installed V2.0 yet with smc3?

This was my V1.3 interface settings:

Interface Output MUST be now: [A<Axis1a>] etc.

Yeah, that one got me as well when I first installed the Beta, lol. Pulled some hair out of my already balding pate.

Thanx.
Now its working. But.. the smoothing option is not working neither in the
game manager output testing, neither with the games....some games unplayable in this way....

George

Asked and answered in another thread.

SMC3 Arduino 3DOF Motor Driver and Windows Utilities

The updated SimTools v2.0 interface preset can be found here ...
https://www.xsimulator.net/community/threads/smc3-arduino-3dof.6410/

If I recall you must use a "b" though instead an "a" for dof 7-12; thus its inclusion.

Hi @RufusDufus
its great idea for this FW also like some others to have a few lines of command performing startup and shutdown output.
thank you and also @speedy for mentioning.
Hooshang

Hello,
As it is my first post I want to thanks to everyone for sharing such interesting things.

Would the trick of the MM's would work with IBT-2's to get more amps out of them before they burn, or the burning would be instant ?

I got some little trouble making things work, everything ok, but i cannot set the PWMmax to more than 70, if i do so my PSU shuts down a little when it reverses, i tried to set PWMax a "little" further and one side of an IBT-2 died.

I tried with one motor only and IBT-2 : the PSU stills do that little shutdown on reversing motors. Anyone got an idea of what could be the problem ?.

I checked the wiring and it is exactly as shown on the picture for Ibt's.
I use the code in mode2 as it is IBT-2's.
Pots are working fine in the software.

The motors I use are : MY1016 24V/250W/15.7A ( with DIY chain gearbox ) (( motors wich are not grounded ))
The PSU : T-1000 / 24V/42A
H-Bridges : IBT-2
The pots : 10K linear
And arduino Uno R3

I suspect either the IBT's or the PSU, but i'm unsure about it, anyone experienced similar problems or has an idea ?

Thanks,
Rémi.

hi ,
sorry for you that your ibt-2 died. Before it died , when PWMmax was set at 70 , was it hot ?
is it works with no load ?

Some motors need a lot more current when changing direction. I experienced something similar but my IBT became very hot before it burned.
for me, 2 solutions :
-- I decrease the load on the lever arm
and
-- I connected two IBT-2 in parallel in the same way as Pit did with the MM
after 1.5 years it still works.

Hey,

No problem, trial and error...
I tried with no load and the pots unmounted, I guess they got hot ( I didn't touch them ) because one made a hiss like an open condenser and started to become smelly ( didn't see magic smoke tho ) plus when I removed the heatsink later on, saw some of the card is stuck on the heatinks. The other one has some plastic up the BTS7060B chips wich is liglthly smelted and the C2 Condenser "juiced" but surprisingly this one is still working, no doubt i'm going to change it anyway.

What i'm gonna try is :
- To wire 2 IBT's for 1 motor
- Put non-conductive thermal paste between sinks and card as I saw earlier on this thread it helped some.

Thanks alot for helping out.

Rémi.

When we buy boards from china sometime they are poor quality, it's happen to me too. But fortunately they are cheap and we can replace it easily.
Sometime it is not our design !

Hi Rufus,
I have problem with v0.7, the nonlinear mode is still linear, only the amplitude of the triangle wave is changing, the waveform is the same, just like with linear mode. In nonlinear mode you have to give a smaller voltage to AN5 to get the same attenuation as with linear mode, but the waveform never changes.
What can be the cause?

I have all my project based on this, you have to modify something to be able to use version 2.0 of Simtools? Has anyone tried it with Rufus's project?

SimTools 2 is compatible to SMC3.

I'm not sure I understand. The attenuation is applied to the motor outputs. In non-linear mode it will hardly effect signals under half scale until you wind up the attenuation quite a bit - because its non linear.

Maybe post a video so we can see what you are talking about. That is the default mode I run with so it works.

What i did was: in SMC3 setup the target was the triangle signal. The feedback curve follows it promptly, with 5V on AN5. With 2.5V [and less] on AN5 you can see that the feedback curve's amplitude is dropping, but it will remain the same, edgy triangle. [totally straight line, then turn back sharply] If feedback would follow target nonlinearly, there must have been some round off occuring.

If not this way, then where should i see the nonlinear behaviour?
I have Arduino nano, if it matters.

If you look at the curves shown in the first post you will see that compression curves are "close" to linear for signals under 50% scale. I doubt you will see a great deal of distortion on the test signals as they don't go full scale. The idea of the non-linear scaling is to reduce the larger amplitude signals but maintain as much of the smaller signals "bumbs/road noise etc" as possible.

I agree the scaling works well. There is a considerable difference in feel between the two.