Found it all on your AMC board.........what a difference. I can't wait until we get it all correct, especially the arm movements for maximum movement. It is so much smoother now. When we Skype you can fine tune it even more. Flying feels great!!!
I'm hoping my upper platform is ready today, or at least by Sunday. I set the <P> setting to 5 and the i and d to 0. The platform seems to run very smooth that way. As I increase the P, the platform seems to get a little more abrupt in its movement. (I know the steel platform will be much more solid, especially where the arms mount to it.) The downside to the lower P setting is it seems to cut down the range of motion. I know we will fix this when we Skype but I figured explaining it to you would give you a little more info on what's happening. One other thing is that motor number 4 seems to be down well below neutral during normal use when flying. It works fine and moves properly but it seems it's center point is not correct. This is only when using the BFF program with X-plane. During racing sims along with the test function in x-sim it is centered like the rest. Looking forward to Skyping.
I figured I would upload a video of my platform in motion. Even though it is not the final upper platform at least you can see what kind of movement I'm getting thus far. I'm flying x-plane and you can see the computer down on the right of the video to track the movement. The platform has not been calibrated yet so the full motion might be greater once its complete. Thanos will assist me once the completed upper platform is installed. I'm running the motors at 100%, my P at 9, I at 1 and D at 0. Oversample is at 4% I'm sure its not all correct but it seems to be much smoother than at first. Looking forward to Skyping with Thanos once complete to calibrate.
Looks good Steven! Great range of motion and really smooth as well!
From the video I see it needs higher P (perhaps 18 or 22) and I'll need to find for you the setting for the PWM frequency of the vfd‘s to set it in 10kHz or more so it wont be so audible (whining noise)
Thank you Thanos.......trying to do as much as I can so I don't have to take up too much of your time. I am learning a lot by trying to do it myself. Thanks for your support. I'll change my P to 18 and see how it goes. If you can tell me where to find the PWM frequency that would be great. That would make my wife very happy.......lol!!!
When I raise the P value the platform becomes very jumpy. I can assume some of that is from the wooden platform and it's mounting points which are strong but not as solid once welded. I see the jitter there not in the motor arms where I thought it was also coming from. I guess we can address that once I mount the new platform. I will admit at a P value of 18 the platform is more sensitive and it reacts better to Xplane. It has it smooth moments but when the motion gets abrupt it shakes. I might go back to my tighter HEIM joints if maybe that's the case but that will be my last option since I think they were binding too much. Many variables to consider. One step at a time.
Could the external brake be causing the motors to be a little jumpy???
Ok, I just realized that I never turned on the external braking in my inverters for my resistors. Under B090, Dynamic braking usage ratio, it is currently set for 0.0% I'm going to set it at 50% to start. Not sure if that's going to help but we have to try. That will activate the regenerative braking resistor. My B083, Carrier Frequency, we had set at 12. It could go to 15. This is where we set the PWM carrier(Internal switching frequency). I assume this is where we can try to go a little more to reduce the squeel?
Take a look at the amount of movement in the platform with me just moving it by hand. There is a lot of play in the gearboxes causing the movement. You will also see how it vibrates and shakes when I put it through it's movements when testing on x-sim. Maybe the upper platform is not heavy enough but it still does it with me on top. Just want to make sure that this is something that can be adjusted as I'm a little concerned after all this work.
Try reducing the on-line and off-line speed more. It looks like its very fast to me on the video. I remember when I was trying Richards platform (a year an a half ago now), I had to reduce the speed 50% as his gearboxes were too fast. Slowing it down a little bit will make the vibration go away or minimized as well.
For the backlash you may try something like Vicpopo did on this platform, with tension strings to keep the platform from free falling during downwards motion and keep the backlash to minimum: www.youtube.com/watch?v=JwrDSTO61uE
dureiken: Hi there, it's really quiet here someone could help me for my 6 dof project ? thanks a lot
Aug 8, 2017 15:34:46 GMT
tronicgr: dureiken Hi, Open a thread and I'll try my best to help. A little busy with Kickstarter details at the moment but I'll see what I can do.
Aug 12, 2017 11:57:42 GMT
dureiken74: I just did it
Aug 27, 2017 11:59:06 GMT
fimmy: How's the firmware going?
Sept 6, 2017 8:34:43 GMT
tronicgr: @fimmy I had to put it on hold to finalize the manufacturing of the new kickstarter controllers. I tested parts of it to ensure compliance with the new features and looks good so far. I'll get back to it soon for integration.
Sept 9, 2017 12:52:35 GMT
Theuns: Very nice design.I'm also busy with mine and changing it also to Linear Actuators with 220v Servo motors.I'm waiting for my new controllers from Thanos. If I may ask Do you have any Sketchup files of your design and willing to share it I Thanks Theuns
Sept 14, 2017 22:45:09 GMT
atayeu: Hey everyone! I'm reading up and gathering all of the intel I can find for my first motion platform. this is by far best information for creating one.
Oct 14, 2017 7:25:57 GMT
tmcnam: I must be crazy but I still can't find the blueprints to the platform by GA-Dawg. Any help would be appreciated. Thanks guys.
Mar 10, 2019 21:31:57 GMT
Trip Rodriguez: Sorry tmcnam, the shoutbox doesn't get much attention. Did you find the blueprints? They are at the VERY bottom of the extremely long first post. It says "attachments: 6DOF.zip
May 4, 2019 19:13:25 GMT
zivby: How much weight this setup can carry?
May 19, 2019 11:57:16 GMT