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Post by tronicgr on Oct 30, 2014 18:17:10 GMT
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Post by riton39 on Oct 30, 2014 23:08:10 GMT
judder when the engine mounts the load, the engine can not go up. Too load.
I added a UPN 30 kg "+ a 30kg bag of cement
0.1 with acceleration and deceleration is better.
with 0.2 load up better, but the PID is difficult to resolve, there is delayed and the load begins to fall.
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Post by nopilotyet on Nov 1, 2014 13:34:24 GMT
Something to consider... I see definite movement of the motor and reduction gearing. It appears that before the load begins to move, the PID loop believes it is moving the load then "winds up" when load finally moves this stored energy unloads causing an unexpected feedback "jump" then the PID may be backing off and so begins an oscillation that repeats. Perhaps firming up the mechanical components would tie the movement to the PID.
Just an observation. Hope this helps.
Eric
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Post by riton39 on Nov 2, 2014 13:11:17 GMT
thank you,
for sure the mechanics are not permanently finished.
I have to finish all and all set correctly.
this is my next step now.
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Post by riton39 on Nov 11, 2014 0:20:12 GMT
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Post by tronicgr on Nov 13, 2014 23:48:39 GMT
Why not securing the motor better? I see you only bolted it on one side. The other side is free to move up-down a few mm... That confuses the PID algorithm as well...
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Post by riton39 on Nov 14, 2014 16:24:36 GMT
yes I absolutely better secure the motor ....
I just wanted to test the behavior with games.
I needed to check the functioning
I have to weld steel legs in line with the other.
but the future engine will be bigger than this one.
I'll back the engine compared to this one.
the attachment will not be at the same location.
I'll stop testing with this engine.
for me it is perfect.
Now I'm waiting to put the budget aside and I will order engines next spring I think.
During this time I will finish the frame and mdifications for large engines, the 360 ° rotation .....
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Post by riton39 on Nov 25, 2014 7:10:34 GMT
I made a video to show small effects, the differences with a range with 3g and a range with 10G.
small effects are still there, the largest range allows more details.
just to compare and to provide information
No ramp 0.0
45.0.0 PID
Motor 30 RPM
AMC motor Max Speed 100% min 0%
oversample 1
0.0 analog filtering in the drive
all drive parameter are optimized speed and reaction
I would make a video to show the loss of information with a ramp |
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Post by riton39 on Nov 26, 2014 22:31:02 GMT
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Post by riton39 on Nov 28, 2014 9:46:55 GMT
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Post by riton39 on Dec 10, 2014 20:18:06 GMT
I ask myself many questions, seeing your simulators and settings.
it is now long as I practice, I have already a simulator 2 DOF with AC motor.
I absolutely do not understand the settings you have on your drive and the AMC 128.
for me they really go against what should be done.
I do not like to comment without justifying myself, so I you make videos is speaking, I let you judge.
you have my optimized settings on video, with or without load.
it changes little thing if the engine is quite powerful.
best setting .
bad setting:
can you explain why?
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Post by riton39 on Dec 24, 2014 17:37:58 GMT
Merry christmas from France!
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Post by riton39 on Jan 15, 2015 17:53:47 GMT
hi, sorry for the traduction ...
some new project.
I advanced a little, I soldered my columns
for fixing the poles, it will allow me to move forward on finalizing the installation.
Subsequently, it is already well advanced:
verif measurements and manufacturing of X holding the poles,
mounting tabs ...
as originally planned but awaiting verif, making a 2 nd cross mountings 3 poles,
they will be sandwiched.
less cool:
I'll change what I do and turn the engine mount flat front welded to the tube.
if I did not galley too much and it's clean as I like, I turn the other to return to single tube.
then cut new engine mounting plate
I welded on the tube itself
the aim is to put the rods parallel to the tube so that the displacement is linear in the axis of "actuators"
At the same time, I soldered my other 2 wheel bracket, the first being sold to our friends from the forum.
I'll then passed to the finalization of the study of the hub will make the rotation of the assembly.
fixing on the cross will certainly adjustable to allow for advanced
the point of rotation, to increase the distance of the center of rotation.
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Post by riton39 on Jan 18, 2015 10:50:13 GMT
Modified:
I started to cut flat front or pass the cam.
it's a bit of a chore, but that did ...
make and unmake it is working!
the purpose of this mod is twofold:
- Move the engine toward the center to position, the cylinder axis to the half of the cam, that to the symmetry of the displacement.
- Move the engine back to the connecting rod is parallel to the displacement of the actuator.
I will definitely delete all the flat, my manic side.
it will be much better that way, I'm sorry I was a little fast on this point ...
especially since I had hesitated to weld immediately engine mounts without having tested true position with engines ....
That'll teach me.
then the new base engine will be a mounting plate 10 mm thick to be able to screw threaded engines.
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Post by riton39 on Feb 1, 2015 11:16:04 GMT
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