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Post by wannabeaflyer on Dec 8, 2016 23:01:23 GMT
Hi Guys need some help or ideas , I have built a 6dof motion platform using dc Linear actuator, the system seems to be running fine at the moment now that I have changed some of the PID setting on my AMC128USB controller ...Thanks for the Tips @thanos..
My System is based on an AMC 128 USB controller , Ians BFF motion software and DE Sabertooth Motor Controller, im running Project cars at the Moment and sometime during the simulation for no reason I can understand at the moment, the platform will goto hold position, ( stops motion even though the PCars is still Running) so I need to Press the bff drive function button on the steering wheel and the platform restarts the motion no problem . check out the link youtu.be/j6rexHaYGqY
is this anything to do with false triggering of maybe the K assigned LM function , is there a time out setting I need to change , im checking with Ian at the moment to see if its software related , the annoying thing is that mechanically the platform does a great job , I have not tried Asseta Corsa yet to see if the same problem is there or Dirt rally all of which I have set up to run with Ians BFF motion software
Has anyone else come across this condition ? any pointer would be greatly appreciated guys Cheers
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Post by tronicgr on Dec 9, 2016 20:11:43 GMT
Before anything else I would check the timeout setting. see if you can set it to the highest value: And video where to find it: youtu.be/GCrWUpaIIwM
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Post by wannabeaflyer on Dec 10, 2016 18:22:33 GMT
Hu Thanos Thanks for this tip I willl try this later fingers crossed I will have some good news to feedback to you guys . Cheers
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Post by wannabeaflyer on Dec 12, 2016 21:07:02 GMT
back to the drawing board for me . altered the timing and it still drops to hold every now and then , I may try disabling one pair of actuators at a time to see if the problem is related to something on the controllers ,, funny thing is it definetly is a hold signal because the motor are holing hold position firmly with slight judder (may be pid setting issue ) and as soon as I press the drive button of she goes again ..
I know im pushing my luck but are there any other areas I can check to confirm there is no issue with the controller settings ,
im emailing Ian for some ideas software wise so hoping between you guys I can get this problem sorted , I will try asseta corsa later to see if the same issue occurs there .. Cheers
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Post by tronicgr on Dec 13, 2016 1:54:41 GMT
What do you mean you have to press the drive button? Which button is that? On a joystick? Is it associated with Ian's software stop/drive function? Maybe is toggling the drive function?
Do you see Ian's software on hold or it keeps sending data when this happens?
The amc1280usb won't go on hold unless there is no incoming data for the predefined delay period.
Can you take a video of when this happens, pointing the camera to the amc1280usb screen? I want to see if it will return to the standby display (with the percent bars)
Thanks Thanos
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Post by wannabeaflyer2 on Dec 13, 2016 7:30:09 GMT
Hi Thanos Thanks for trying to help me with this , I'm at work now but will look into your tips and get video done later :-) mega thanks
Yes The drive and Hold buttons are assigned to the my G25 Steering wheel from Ians BFF config File .
if I remember correctly ians Program may still be sending data as once I press the drive button there is only a small delay while the platform ramps up to full sim speed ..
I kept watching the AMC controller LCD yesterday and did not notice any dip or loss of display when there was a phantom Return to Hold occurance but will Video this tonight .
I did notice that one pair of the actuators seemed to have intermittent operation ( Act 2 & 3 ) so this need t be checked
I need to have another monitor ( Focus goes to Pcars and hides BFF )
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Post by wannabeaflyer on Dec 13, 2016 19:52:06 GMT
Hi Thanos did the test video of the amc during one of these hold signal glitches and did not see the lcd change state at all , by that I mean when the platform stopped I did not see the lcd flicker it stayed on the " Receiving data " Screen so I don think the issue is AMC related in that respect .
The AMC timeout was put back to 10ms motor speed around 85% PID (P) set at 115 and I =1 D=1 (will double check that )
youtu.be/23AWWWzarZ4 This video shows the problem occurring even with the platform disabled
Im Running P'Cars in Auto driver mode and have BFF visible on the Plasma screen , you see that both programs seem ok then for no reason ( I can see ) the BFF indicate Holding and BFF stops transmitting Data (Motion platform still disabled) I then Press the BFF Assigned Drive button on the steering wheel and then the Motion data is transmitted again so if the Platform was active it would have resumed motion ...you will notice thast several time at the end of the clip it start sending motion but then goes to hold ??
I know your busy so its a case of when you get a chance have a look see for me to see if im missing something really obvious ...the G crash setting is set at the default value of 5 .. Not sure if this is ok for F1 car at Nurembergring Cheers
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Post by vulbas on Dec 13, 2016 21:13:14 GMT
hello, answer by ian
I put 10000. and now no holding lol
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Post by wannabeaflyer2 on Dec 14, 2016 7:41:17 GMT
Hi vulbas Thanks for the Tip , I will try this later , Ian is sorting out a data logging routine for BFF to see if he can capture what's triggering this, I hope its as easy as changing this parameter LOL then I can get back to playing with the sim ( and learn to drive without needing autopilot to get me a good lap RFOL ) Cheers
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Post by wannabeaflyer2 on Dec 15, 2016 13:33:37 GMT
Hi Guys Good News to report ( I hope not prematurely ) thanks to the help and advice from Ian and Thanos and members Of this and another forum , I'm happy to report the phantom drop outs to hold seem to have been cured , it turns out that the Crash Indicator parameter in the Bff software was set too low ( I underestimated how much force these F1 cars handle ) so when the BFF software saw a value exceeding the pre set parameter limit , it was seen as a crash and therefore went to hold position .
good news is the sim speed is being cranked up and all seems well mechanically and speed wise so far , so now comes the real heavy duty duration testing ..
Just wanted to say thanks to all the guys that offered advice and helped me sort this problem ...
Wheel spinning time now me thinks :-)
Cheers Guys
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