OK some kind of progress although not sure exactly what is going on..
When i switch on VFD 1 , both 24v a/b outputs on amc go to 24+ volts and f001 (the frequency reading) jumps to 14000 and skits around.. but no movement on motor.
So i tried VFD 3 that has a pot wired to it. when i turn this one on A goes to 24+volts, B is 0 until i press a direction button for a few moments and the motor comes to life and starts rotating continuously on its own. when i press a direction it turns in that direction until i let the button go and then continues rotating on its own again.
Am i correct in saying all AB's should read 0 volts until i press direction? if so why is the amc outputting continuous +24 voltage on its own when i turn on the vfd. Its as if the AB's are cancelling each other out preventing the motor from running.
The VFD's that only have a OR b outputting continuous seem to partially work.
I dont have an a/b group that has both a/b at 0volts until i press a direction. they are either both 24+ or some are a on b off or visa versa.
Could this be an interference or noise issue or maybe even bad pots?
Hope this is clear to follow, its a bit confusing.
OK so having each motor on its own movable mount gives some more flexibility in placement and modification later, but one problem is it was making it tricky to line everything up.
So i had some wood in the garage and knocked up a quick jig to align the motors to correct distance and angles.
Made it really quick and easy. The shafts in these motors have an m12 thread at the end so just bolted jig to each shaft and voila.
You are clamping the motor on the 'rails'.. or how you might describe it .. Aren't you worried the motor will slip to the outside? Thinking of the same principle instead of bolting it through the rails... or perhaps of a slice of rubber, bicycle tube, between the crossbars and rails.. I see the advantages of not having it bolted or welded through and through, but isn't here some catch..:-)
In the last stage of designing the lower frame but still deciding on the motor mounting!
im not sure dr D intended to raise the main beams up off the floor originally as it now seems to be causing some flex but was needed due to the lever arm length. I kept my lever arms at 160mm CC so the beams and mounts are all at the same level on the floor. the weight of the steel and gearbox's and motors is pretty darn heavy all together.
Once it is bolted with nyloc nuts and torqued hard it appears to be very solid but i guess we will see,
i figured if i need the extra security later ill just weld the mounts to the frame once its tested and i know its all in the right place.
Ah.. Saw the video and see what you mean with the flexing.. I thing if you connect the motors at the top with a bar it will stop or limit the flex.. I will make a wooden cornerpiece so that I can connect 2 motors at the corners.. I'll go for the same route as I see the options you have in case you need a small change.. BTW my levers will be 180mm and my rods at the topframe at 90mm apart, didn't wanted to do the 50mm version, would mean less stable in my idea.
please film the testing of you frame.. would love to see it moving!!!
yep i wanted longer levers which is one of the reasons i went with bigger gears and motors, but after working out the height of the sim at maximum heave it was getting uncomfortably close to the ceiling. i probably had enough room but ill know better once i have "mark 1" up and running
yep ive got a few ideas where i can add extra supports if needed, i think our gearboxes will allow easy mounting of extra supports.
will get vids for sure, a bit of work to do still before i get the platform mounted but at least i can push forward again now.
This is X-sim offline 6dof test programme. The pots are zeroed but not connected to shaft. Tried connecting one pot to shaft which on movement caused the shaft to rotate then stop and oscillate. I think this is something to do with 135, 246 config and pot direction? the lever directions do not match the xsim model on movement so I am checking a/b wiring at the minute to get directions to match.
OK all motors move OK in xsim 6dof software without pots connected.
When I connect the pot to the shaft I can tune it so that the shaft is stationary and frequency is zero on inverter ie 50% pot position. But as soon as move command is sent (ie with manual sliders on 60dof plugin or even with amc buttons) the motor just races off to the 180 limit of the pot then stops and oscillates.
Is there a setting I'm missing to set the pot correctly?
Test the other setup as the one you are using for sensor postion . If pos 135 neg 246 selected , test the other one.And normally if I remember because there is a while since I wired my sim rig , you have to swap the wire for 3 sensors positions .
But normally if everything is ok when choosing pos 123456 it has to work correctly.
OK I have it sorted now, its just AB direction issues, I am finding the easy way to solve it is just leave pos 135 and neg 246 and just switch the AB wires on AMC until everything is correct.
another problem I have found now the flexible couplers like the one on ebay:
These are not proving to work that great, they may save stress on the pot but because of the amount of flex it is proving difficult to get the pot to re-centre exactly on return to home position. Think I need to find a different solution without the flex.
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
jeanmarcfr69: Thanos je suis francais et j'ai besoins de compléments d'information pour finaliser une installation avec 1 x AMC1280USB DELUX avec extension 3x servo motor DORNA. POurriez vous m'aider ?
Apr 12, 2021 6:58:17 GMT