Thanos AMC1.6 USB 2DOF Motion Controller

[vicpopo]

Hi Thanos,
I saw once the video but without your attention ,it's not the same thing.It's very impressive what you've done already in 2008!
My actually simulator isn't so far as dynamic as yours !
Respect!
Gilles

[ne02005]

It will be still for two axis, but two motors working together for more power. It was done before.

Ok thanks.

There are any way to convert our simulators in 3 dof? with amc 1.6 ?

Thanks

[tronicgr]

Yes, you can use two AMC1.6 in independent axis configuration (JoyR). Then you can do channel mixing from x-sim profiler for all axis and even have one more axis spare if you wish rotation for your 3DOF, kinda 4DOF... It can be done with a little effort.

Thanos

[vicpopo]

Hi Thanos ,
I made a test with your firmware 1.1e and race on!
Configuration:
Amc1.6 + thanos dual h-bridge + ss490 pot hall sensor!
Xsim 2.1 (promised I will upgrade to xsim 3!! ) with effect 25 longitudinal + 26 vertical effect configured.
As you can see it's look great and works! I tested the pot ss490 , it's possible to reach a angle course more than 90°.
If I can find a h- bridge which can support my bigworm motors I could test this on my actually simulator (I know pololu)!
May be Speedy h-bridge or a evolution from your h-bridge Thanos which could support bigworm motor (I red it on Speedy post )
Video in HD format for a good watch ,enjoy !

Circuit : magny-cours

[ne02005]

Hi Thanos!

I´m still using old AMC 1.5 until arrive my Atmega 644 for make new board.

Yesterday just arived my Pololu´s 12v25A mini board!!! that you recomended. Is VERY small!!! and amazing.
It works fine (Only 3 wires! for conecting),but the motors shake a lot when they are in repose...
And sometimes the power supply (PC power suply 18A) shutdows...

With your old Hbridge, the Pc power suply never shutdowns.. What could it be?

Maybe the KP settings? May shake the motors and could be shorting the power supply?

I´m a little dissapointed, but I hope the fail be some configuration problem...

Thanks a lot!

[tronicgr]

Hi ne02005,

You mean 18v25A mini board... Yes its very small and powerful. I use computer power supply with it too and happens to shutdown sometimes when I let the motor do TOO MUCH changing direction with load. The big currents trigger the PSU safety fuse since there are peaks more than 18A...!! But there is solution to that, you could use a really big capacitor (like 1Farad / 25v) in parallel to the power inputs OR just use a CAR battery that can absorb back the excess current.

Or if you feel brave enough you could google to see how you can disable the PSU safety triggers to allow larger peak currents, with the danger to burn the PSU.

Generally I prefer to keep the KP setting low, within values 3 - 10, for normal potentiometers of 270 degree rotation, but if you are going to use more travel rotation with 10-turn potentiometers then you could increase it. Just keep it to a point that it does not shake the motor back-forth when it stops into a position and make sure you still get some dynamic motion from with with smooth acceleration and decceleration.

Thanos

[tronicgr]

Hi Thanos ,
I made a test with your firmware 1.1e and race on!

As you can see it's look great and works! I tested the pot ss490 , it's possible to reach a angle course more than 90°.
If I can find a h- bridge which can support my bigworm motors I could test this on my actually simulator (I know pololu)!
May be Speedy h-bridge or a evolution from your h-bridge Thanos which could support bigworm motor (I red it on Speedy post )

Hi Gilles,

I'm still un-boxing my equipment to my new house. I hope I'm done sorting and have my lab up and running soon. I have a huge garage now (3 cars capacity) with lots of space for my simulator.

I'll start experimenting with bigger h-bridge design for bigworm motors as soon as I have one. Be a little patience, I have some aces in my sleeve...

But if you feel brave enough you could try this neat looking h-bridge I just found on ebay. Its fully compatible and cheap enough to give it a try. The drivers its using (BTS7970) are typical rating of 68A at 25°C.
High Current Dual Motor Driver Module Board ** with Heat Sink ** PWM Signal


Thanos

[vicpopo]

Hi Thanos ,
Thank you for this information!
With this big room in your garage you will build a 6dof simulator or this one I saw i the forum with which one you can roll 360 and multi turns in all directions!
The board you linked me on ebay can drive one motor in both directions CCW and CW ,if I right understood the description!
Ok I will see!
If I have time before my holidays I will test the amc 1.6 with asynchronus motor with inverter and race on like the video above (DC motor and dual h-bridge)
Regards

[tronicgr]

The board you linked me on ebay can drive one motor in both directions CCW and CW ,if I right understood the description!

Its double driver!!! One board drives 2 motors!!! So the price is not bad at all if can hold well for the bigworm motors.!!!


Thanos

[vicpopo]

The board you linked me on ebay can drive one motor in both directions CCW and CW ,if I right understood the description!

Its double driver!!! One board drives 2 motors!!! So the price is not bad at all if can hold well for the bigworm motors.!!!


Thanos

Hi Thanos,
I saw it too but I understood that you can't drive both 2 motors in PWM mode for each motor.
Ebay description
2. method Two

Motor drive need PWM output, in the meantime MCU has two channel PWM output:

Power on. Then connect PWM output of MCU to input pins:

Attention: two channels PWM CAN NOT output at the same time, otherwise will burn the driver. (when the PWM two channels output at same time, both LEDs for the motor will be on)

3. method Three

The driver needs output PWM, but can only output one channel PWM:

Connect PWM to EN, then lead two wires to IN1, IN2 (for motor 1). Likewise for motor 2:
Regards