AMC-AASD15A servo controller

PA: Don't drink and drive!!! Unless you just finished building your sim rig and celebrating!!!

Hi @Thanos,

Just wondering if any of your controllers support the T6-750RS servo controller, as per this item:

https://www.omc-stepperonline.com/t...-2-39nm-17-bit-encoder-ip65-t6-rs750h2a3-m17s

Thanks in advance, love your work.

Or the S2-SVD15 controller per this item:

https://www.aliexpress.com/item/1005006169568354.html

Or the T3D-L15A controller:

https://www.aliexpress.com/item/1005004865533266.html

(apologies for multiple posts but I wasn't quick enough editing my original post)

I just updated my AMC AASD15a to the latest firmware (fix8), as i was interested in the pullback adjustments and the ability to turn off the motors/power when in the park position. I have a 3DOF eRacing-Labs with 4 x 150mm actuators (RS Mega+) with 4 AASD15A servo drivers (80ST-M02430). For software I use SRS on Win11.

1. I don't understand the pullback options I think. My understanding is that it can finetune the bottom position of the rig, so that the motors are not constantly applying torque to hold the rig a few mm above absolute bottom, or pressing down against the hardstop. I have understood that dn002 on the servo drivers will show the applied live torque of each motor. So, based on the video I saw of this feature from @Thanos, I set all axis to 75mm pullback, as it looked like he had the same actuators in his video.
That produced these torque numbers:
FL 17, FR 18, RL -10, RR -4.

Ok, not bad i guess, but I could hear the motors engaging constantly so changed values to see if that helped. Adjusted all axis individually (did not us the copy to all axis function as I saw a post in the GitHub claiming that function did not sett the pullback for all axis properly, so sticking to setting each axis.) to 100 and got the following numbers:
FL 13, FR 17, RL, -7, RR, -3.

The i tried 200 as that was the default prior this feature being adjustable, and that produced these numbers:
FL9, FR 17, RL, -7, RR -3.

I found these numbers changing with the settings, but not in a consistent manner I was expecting. Also, the rig does not seem to alter the park position relative to the bottom hardstop no matter shat setting I use for pullback. It always seams to have the front a few mm above the hardstop like it always has had (one of the main reasons I wanted to adjust this was to get rid of the front falling a few mm when i cut power.)

Am I missing something here? Can somebody explain the pullback feature better? For example, increasing the pullback number should "lift" the rig, correct? And increase torque (or lessen a negative torque number)? But I increased from 75->100->200 and got decreasing positive numbers for the FR and FL actuators...

2. Turning of power in park position. I tired this, and it does cut power, but something weird happens afterwards. If the rig has been in the parking position for more than the defined timeout minutes (tried both 10 and 2 min), it does cut power. But when I then actuated the rig again, either via the buttons on the AMC or entering a game or test in SRS, it lifts to the STBY position (50%). But when it then goes to the parking position again it does not seem to stop, the actuators continue to try and drive the rig down against the hardstops! The first time it happened I could hear the actuators creaking and cracking, and my heart almost stopped! But luckily, it was probably just parts settling against the pressures, as the next time it happened there was significantly less noise. Both times all the servo drivers gave the AL-06 code, which I have not been able to find, but assume is a safety feature to prevent damage, or similar.
Is almost looks like the AMC does not know the actuator position after a power down using this new feature, and somehow thinks that the park position is much lower than it is.
For now I have turned off this feature, but hoping for a solution, as turning of the power and getting rid of some of the motor noise when the rig is in the park position would be nice...

Hi Folks!
I'm having an issue with the AMC-AASD15 I've just setup on my 6dof rig. I'm pretty sure I've nailed everything except for calibration, which is totally out of whack and I think I know why, maybe you guys could help me out. I'm assuming that the controller expects to find the inductive switches at the bottom end of the rig, when it's at its minimum travel. However mine is the opposite! I've based my design on @knaufinator's.

That being said there are all sorts of issues pertaining to my switches location. I've made my way around by reversing motors direction within the software, however the AMC still operates in reverse from the switches position. This messes up my calibration and haven't been able to match the position and range with that of FlyPT.

On another hand, when it calibrates upon initialization, the swing arms are all going in the opposite directions so they make a full turn going down, then up to the switches, almost 270deg. I hope you guys understand...

Is there any way to instruct the AMC about the switches being up top? Biggest issue right now is that I'm not even close to match the ranges from software to hardware.

Best regards!
Alex

Been busy, so just a quick video for now.. must have a break for fun right?

No need to use limit switches etc. just create a hard stop to the bottom side of the travel:
https://youtube.com/shorts/T-_AlPX6hz8?si=q4vq8rnNs9hX2Ud8