Alternate Wiper Motor approaches

[vicpopo]

Hi ,

It's also that I want to do.
I just try to suggest that the setup with AC Motors is to focus like the others.
At the begining of my project AC motors were for me a mountain to climb.
Now I can configure a setup with ac motors as fast as you for JRK.
But I'm agree with you it's not the cheapest solution .

[motiondave]

The author of the thread is evaluating movement types between different motors, starting with wipers.
He is looking at something that snaps as fast as a scn5-6, of which, 12v 200 watt motors with a good lever on them move at.
I think we have sufficiently covered SPEED of motors, not so much power and or cost.
Lets leave it at that.
Let the author of the thread decide.

[RufusDufus]

Hi All, Thanks for comments so far, very useful...

The thread has gotten a little off topic though (I probably wasn't that clear in the first place).

My main interests are peoples thoughts on different ways of connecting motors (whatever type) to the sim seat - other than a lever connecting rod arrangement.

ie what methods have been used and the pros and cons of those methods from anyone who has tried them in practice.

[motiondave]

ok, the lever and rod ends is the favourite.
You could also use gilmer pulleys and toothed belts, but you still need to connect it as a hard point to a frame.
a pulley set up has been done, but more on a flight frame, allowing big movement.
With the motor, either wiper, big worm gear or 240v, you would only be using about 90-180 deg total movement anyway.

what were your plans? Race ? flight?

[RufusDufus]

I am looking at a racing simulator. At this stage I like the * style of design. Probably just start with 2DOF but design it so I can add the 3rd later for traction loss/wheel slip.

Would like to make it in a way that it can be easily broken down into sections so it can be transported in a car?

[motiondave]

I am looking at a racing simulator. At this stage I like the * style of design. Probably just start with 2DOF but design it so I can add the 3rd later for traction loss/wheel slip.

Would like to make it in a way that it can be easily broken down into sections so it can be transported in a car?

not sure what style you are looking at.
I have seen a static PVC pipe sim being made into a full moving sim. The PN18 rating pipe is very sturdy. It would be easy to pull apart in sections if you used screws to hold it together.

Got a photo of what you had in mind?

[RufusDufus]

Haha.. That's funny. I assume you're not allowed to use commercial product names in the forum - the name was replaced by a *

Anyway, I am looking at the type where only the seat moves and most of the commercial ones use the SCN5/6 actuators. I see many people have successfully made these using wiper motors.

I guess what I keep coming back to is do you loose any of the "experience" or "feel" by using motors instead of linear actuators because the motors aren't setup to give true linear translation of position from x-sim. (Or does x-sim actually do some math to compensate for this?)

[motiondave]

yes and no
Obviously a actuator that runs at 200mm per second or so is going to give fine snappy motion, but so does a motor with a lever to produce 200mm per second.
I have found the big worm gears are very good and very fast in motion and more fluid than actuators, which tend to be harsh.

I have 2 simulator, one with re-motored brick actuators, viewtopic.php?f=36&t=605
and the big motor sim, look down the bottom of the page viewtopic.php?f=37&t=159

both are similar motion, even down to fine detail, actuators harsher, motors more fluid.
But the actuators I have are hideously expensive.
So big motors are definitely the thing for sure. and a heck of a lot stronger than scn5-6.

[tronicgr]

I guess what I keep coming back to is do you loose any of the "experience" or "feel" by using motors instead of linear actuators because the motors aren't setup to give true linear translation of position from x-sim. (Or does x-sim actually do some math to compensate for this?)

No. The math of x-sim provides linear data. There is no true translation to rotation motion of a wiper motor for example. This means that if you set a constant speed from 0-180 degrees, the output speed on the actuator arm looks like a curve! A math plugin that does real rotary translation is needed but its funny that no-one asked for it before!

Maybe you can open a bug ticked and request it


Thanos

[yokoyoko]

No. The math of x-sim provides linear data. There is no true translation to rotation motion of a wiper motor for example. This means that if you set a constant speed from 0-180 degrees, the output speed on the actuator arm looks like a curve! A math plugin that does real rotary translation is needed but its funny that no-one asked for it before!

Hi guys,

I think we already have such a plugin. I use the logaritmic scaler always at the end of my math line. I think that compensates for the rotation movement of the wiper motors quite well. You can certainly discuss the exact function of the curve. Sirnoname is there certainly open to change.

rotary to linear.PNG (246.45 KiB) Viewed 4087 times

Best regards
yokoyoko