4Dof-Controller code for arduino mega for AASD-15A and similar driver

Solved... The problem was the output string...

Hello!!!

Help, please!

Every time I connect the board, the servo motor spins for a few turns... This is my belt servo.. it makes a mess!
How can I do so when I connect it, it stays just where it is?

Thanks a lot, my body and hands appreciate your help!

I can get the enable pin to work... I follow your schematic, PN003 = 0, but nothing happen with a basic digitalwrite high then low :

#define EnablePin A0 //used to control put the servo on

void setup() {
pinMode(EnablePin, OUTPUT);
digitalWrite(EnablePin,LOW);
analogWriteResolution(12);
pinMode(DAC1, OUTPUT);
analogWriteResolution(12);
}
void loop() {
digitalWrite(EnablePin,LOW);
delay(3000);
digitalWrite(EnablePin,HIGH);
delay(1000);
analogWrite(DAC1,1000);
}

I am using an Arduino DUE BTW

the e-stop signal should be static, holding the output pin high until FlyPT sends data and the arduino recognized the start mark it switch to low.

I agree with that @wingert , but my test code seems to be unable to enable the driver :/

Hi @Rolo F, from my understanding of it is that is what it is designed to do as, go from its parked position to home position which is the center of the 100 mm actuator travel. I have only just finished reading the thread because I'm planning on using the code in my design and not actually used it yet or looked into the code but I would say that is where you would have to modify to achieve what yor wanting to do, just my two bobs worth.

I guess I should change the arduino code... but I dont underatand about coding... but I could follow instructions

For now what I do... connect Flypt, and just then power up the servo...

Just completed converting my RSeat S1 to a 3dof rig by adding 4 SFX-150 actuators.
I'm using your v2 version (many thanks for sharing the code). I'm also using FlyPT to control the rig.

I have a couple of questions:
1. Since I'm using 150mm actuators, what parameters needs to change: Stroke_Limit to 150 any others..
2. When powering up, the Arduino code is moving the rig to the home position. When I click connect Serial output in FlyPT, the rig drops to zero and then FlyPT is again moving it to home position. So, is there a way to bypass the Arduino home position at power up or let it go home and go back down to zero.

I am currently testing the eh-msc-4dof controller. I do not have the problem you describe. As soon as I plug in the arduino the actuators start up. When I then connect FlyPT to the controller the RIG stops like this. Did you set all parameters as shown in the pictures in Github?
How do you shut down your rig? I have not found out how to drive the rig down again in a controlled manner. Currently I just turn off the power and the rig "falls" down.

Sorry, somehow I missed this and wasn't notified either.
1. STROKE_LIMIT 150 is enough, considering you also configured your AASD15-A controller parameters as stated in the README
2. You should be able to use start and stop position for this but unfortunately I cannot test this being away from my rig. Instead of <Axis1a><Axis2a><Axis3a><Axis4a> you should send zero (4 times) for stop and 32768(4 times) for start position. Remember to start with "P4" and end with "!!" There may be other ways to tell FlyPT your starting position but I can't verify now.
I'll report back as soon as I can.

Try using stop position as above, with something like: P4<0><0><0><0>!!
I'm hoping that's the way to tell FlyPT to send 0 position as I cannot currently test this.

Note that because of the end dead zones (the Arduino code will protect the actuator by not going all the way to the end), you may still feel a bit of a 'drop' to physical zero, but it should be very little.

Thank you for your reply. Your tip with P4<0><0><0>!! works somehow. Then the rig does not go down in a controlled way but at maximum speed. That's scary It would be great if there was a special code like for example P1!! which initiates the homeing and a code like for example P2!! which deactivates the rig and slowly drives into the position 0 0 0. The advantage of this would also be that I don't have to disconnect the Arduino from the computer so that the next time it is connected to the computer it will start homeing again. So I could switch the rig on and off with my switch socket without having to disconnect the Arduino from the computer. I hope that was somehow understandable...

How do you guys do this? Do you have a usb-hub with which USB devices can be activated and deactivated?

Sorry about the scare. I’ll think of something maybe using 2 speeds.

I use the kill switch connected o Arduino Reset signal and the rig goes down.

added changes to the development branch to allow using command Ph<0><0><0><0>!!
https://github.com/ehmotion/eh-msc-4dof/tree/dev/eh-msc-4dof_v2
this command uses 'homing' speed to drive the actuator to the requested position.
give it a try and let me know if it works as expected.
careful if you made other changes to your code, like stroke length!!
use this only for STOP sequence.

Brother, set, very fast return 20mm

make sure you deploy the correct code from the 'dev' branch.
it works fine on my side and you can test it from Arduino IDE Serial Monitor but be careful if you're not using the 10uF capacitor on reset since Arduino IDE will reinit the board when you open the Serial Monitor.
use the following commands, with "No line ending"
-go towards end point
Phzzzzzzzz!!
-go towards zero point
Ph########!!
-go towards the middle point
Ph????????!!

using P4 instead of Ph should have the same effect but uses fastest speed.

Can you upload your setup map?

it looks like you are using v1 and the changes I did are for v2 and specifically pointed to the v2 version https://github.com/ehmotion/eh-msc-4dof/tree/dev/eh-msc-4dof_v2