SCN5 overstressed?

When driving (25% limit mode) (100mm) when I turn right I sometimes hear my actuator making a light bleep beep noise (This is when I am driving with sound off, with sound on you obviously won't hear a thing but I always test with sound off.

When I turn left the right actuator makes no noise it is fine.

When I did buy my rs485/usb adaptors I did buy one from a different supplier but both from China. They look the same although there is a slight size difference.

Sometimes it makes the electrical beep. Seems to do it on the way up. Dangerous?

p.s Soz for the pictures to be sideways. The room is crammed and can't get into proper position.

5]Zi6_0037.JPG[/attachment]

Re: SCN5 Hardware Thread

@Fahim,

If your actuators are making a slight bleep noise, it is because they are overstressed. This is most often a result of improper actuator angles or pivot point location. In the wiki, I posted a tutorial on how to test for this.

Re: SCN5 Hardware Thread

The pivot is in correct positon. When there is no power to the actuators I put a force where the backside sits and the actuators don't move.

Looking at the pictures you can see there is angle. I might get new rs485 adaptors.

BTW it is only the left one that makes a slight beep noise every so often.

Looking at the pictures do you think it is better than the frex setup.

Also does anyone else race with volume at 0 to hear every little detail.

Would be good to hear if anyone else ever hears this noise.

Re: SCN5 Hardware Thread

The sim looks nice btw!

The actuator bleep noise always occurs when the actuators are struggling. I am not aware of any other circumstance that can cause this sound.

There are only a few reasons why the actuators would be struggling:

-Actuator angles
-Something is binding
-Excessive load (greater than 250lbs)
-unbalanced load
-pivot point not in proper position. (Be sure to determine your seats balance point with your arms and legs extended!)

Have you tried the slider test that I mentioned in my previous message yet? This will help you to see the actuator stress and resulting bleep for yourself.

I have tried this with the volume off as you will see in the wiki in my tutorial about how to test this.

Re: SCN5 Hardware Thread

I'll do this now. Wiki Tutorial.

Actuator angles
-Something is binding = NOTHING IS BINDING
-Excessive load (greater than 250lbs) = I'M NOTHING IN WEIGHT
-unbalanced load =
-pivot point not in proper position. (Be sure to determine your seats balance point with your arms and legs extended!) = This is what it is. I think when I brake and turn right, the force could be going on the left actuator. I will just change pedal positions. I did notice when I slouch down in the seat it does not make the bleep noise.




BTW I've just ordered 2 daventech usb adaptors. The company that sells them is in England so I should get them in 2 working days.


p.s thanks about sim pics. Yours covers set it off nice.

Re: SCN5 Hardware Thread

Imho the actuator arms are too narrow on the bottom so you may need to move the speaker columns...

What are your speed and accelleration settings in the Profiler SCN5 setup?

Re: SCN5 Hardware Thread

Initial speed = 10000

Initial acceleration = 512


Inital position after homing = 214740000


The race frame is a NIXIM which I bought. I don't think I can change the frame it self unfortunatley. But I can turn the bottom brackets and have it re-weld. So at most I can get one inch more on each side.

Problem 95% solved. Only made one bleep in about 3 laps.

My seat was tilting to the left and I could not tell when sitting in the seat.

I adjusted the left actuator rod end to make it HIGHER so the seat is balanced in centre.

BTW is the initial speed and acceleration settings okay which i posted above.

Great job Fahim,

I'm glad you found the issue as Berney stated earlier the possible causes. Although your angles are more optimal than the Frex design, you could still benifit from them being a bit wider and further back but you are obviously limited by the existing frame. If you're not very heavy that should be fine but be careful if someone heavy decides to take a ride in your rig .

Make sure you test things our properly with the test plugin to see how far you can really push your actuators in their current configuration.

....Mike

hi,
i see your pictures and i mean you mast have more way between the accuatoren in the ground.and
ca 10 cm more back i have make a paint the first is your design.do you have the seat on one side than the scn5 have a minus degree.on the top from the scn5 you can have a short way (22cm).

Thanks Nima, I can get one inch or maybe abit more at the bottom on each side so that is 6-7cm more in total.

But I am happy now I just made the seat central because it was leaning about 2-3 cm to the left at starting position.

Thanks Mike, i'lll test for 2 months before I get powder coating done on the brackets and pivot structure,