Sorry to hear your having troubles and hopefully I will not have the same. Just out of curiosity do you mind if I ask you how much you have spent. I am just over the 7K mark and don't see a way to do it much cheaper. Just want to make sure that my post is close to accurate.
Its a complex project so i guess some challenges are to be expected, hopefully with some perseverance and help i can get this sorted.
re cost i stopped counting after some time back but id say 6-7k is about right. Things where you can cut quite a bit of costs is source motors and gearbox's from china, use cheaper VFD's, use smaller heims etc.
In case its of use to others with wj200's these are my settings so far in the rough order to get things running:
1.B037 - 0activate advanced display 2.B092 - 02Set fan control to temp controlled 3.B083 - 10 hzPWM Frequency (goes to 15 - higher is quieter(less whine) but harder on motors, best to find balance between noise and frequency that suits you)
4.A001 - 1 Frequency source 1=Terminal control(AMC) 2-panel control (F001 speed) use for inital testing 5.A002 - 1 Run command source 1=Terminal control(AMC) 2-Panel control (start and stop buttons, for initial testing via keypad set to 2) 6.A003 - 50hz Motor Frequency (set to motor nameplate) 7.A082 - 220volt Motor Voltage (set to motor nameplate) 8.H004 - 4 pole Motor Pole (set to motor nameplate, 4 is factory default) 9.H003 - 1.1kw Motor Power(set to motor name plate) 10. B090 - 50%Dynamic brake usage in % (for brake resistor if using 0-100%)
11.f001 - Set run frequency 12F002 - acceleration speed 13.F003 - Deceleration Speed 14.A004 - 03 3=sensorless vector mode
15.A005 - 00(factory default)
H001Auto tune 01 without rotation, 02 with rotation H002 - 02 Use autotune data
can also control function of analog terminals 1-7. In our example we are using 1 and 2 for forward and reverse,
C00100 is forward C00201 is reverse
can change direction here Ie Change C001 to 01 and C002 to 00 for each motor or just swap A/B wires on AMC instead (which is what i did)
its late so i may have missed some things here but there is enough to get the motor running normally so i hope it helps, i will add to this as i go. (Thanks to steve and thanos for some of the settings)
I am using the same pots and I don't seem to have an issue with tnem.. I can get to center nicely even by hand.. although I have other problems.. but that is in my own thread.. Can you otherwise try to set the A013 to 3.. sort of threshold..should be the signallevel .. default at 0..
Thanks Michael ill take a look at A013 see if it helps.
The pot center is easy to set by hand but it never returns to absolute home after rotation and difference between home or not is minute it seems.
What is the MIN motor speed setting on the Amc1280usb? It could be responsible of cutting off the speed before the target or much later than it should. Play with that setting as well, some found useful to set the min motor speed to 2 or 4.
OK something interesting i discovered today kind of by accident.
I was testing the 6dof board outputs with a multi meter to try and find out where this electrical jitter problem i have is coming from.
When i connected the + and - probes of the multimeter as in the image the jitter completely disappears and the motor runs perfect. when i take the probes off and run the motor the jitter comes back again.
Thanos do you have any idea why this is, Could there be some kind of grounding issue going on? or is the multimeter creating some kind of resistance or something.
also the output is registering between 0.45 and 0.8 volts even when the motors are at rest, is this correct?
I ordered some 0.1uf tantalum capacitors to run across the 10v analog out and ground and... IT WORKS! huge difference. (also waiting on some ceramic disc ones to try as apparently they may be better for this purpose)
After some more bedtime reading i understand this is de-coupling the 24v DC supply and removing the unwanted noise which is causing the jitter. In fact from what i have read it seems every ones sim may benefit from this as all switching DC PSU's introduce noise into the system which de-coupling will clean up.
indications seem to be that placing the capacitor as close to the IC output (amc) would be best but placing the capacitor across the L and O terminals of the VFD seems to be just as effective and would make it allot easier and tidy to house the capacitors there providing only one is needed.
Now theres a very small blip left which i guess may be because the 0.1uf is general purpose and a different value may be better so i have ordered a oscilloscope to test (same model as you used in your 6dof output testing video thanos and was only £45). Once i identify the exact frequency then hopefully i can get the matching cap or possibly a couple of different values to place in parallel if needed.
Such a relief to finally be getting somewhere with this issue.
The solution posted by mitch in the referenced thread above sounds like the same problem, only mitch was trying to solve it by setting the VFD to ignore frequencies below a certain value. I tried this and it reduced the sensitivity of the motors and still only partially worked so cleaning the noise closer to source seems like the much better way.
There are a few things you need to capture on the noise shape. Like how high is it in volts and its frequency. I see from the video, its maximum 30hz, but it could be higher. You will need to increase the zoom in the time scale.
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