Can I use x-sim for any RS485 compatible actuator?

[x1610]

hi
Thanos whrothe

Trust me, its rigid because of the ball joints. The only backlash you may get is from bad quality gearboxes (0.1mm-0.2mm). Other than that the whole platform is solid.

The geometry don't have to be exact angles etc. The software can be adjusted to fit any dimensions and angles for perfect output.



Ball joints and rod ends have a limited angle of movement ,les than 30 degrade mostly.
Are you shure those joints stay allways below there limits.
regards

[sirnoname]

Jrk's do have firmware bugs. It is very easy to bring them into self vibration. Therefore it is very hard to setup a responsive street feeling like the SCN5. I asked often to join the beta group and compare this interfaces and compare this interfaces. It is not correct to hype a single interface without comparing in a group what we do here, the high resolution plugin is very young without the needed response. However for the first try a JRK is not bad but comes with restrictions. The price for one motor is high compared to a DIY solution which gets updates or are directly editable.
I have compared the many PID algorithm out of the robotic forums around the world. It seems that the most do work with integer instead of floats because of 8 bits. The result was the open source firmware because arduino use floats. It is based on the most followed PID algorithm out of the robotic sector.
I hope the new interface out of the robot combat section, the Kangaroo, will be come with a better algorithm.

[tronicgr]

Ball joints and rod ends have a limited angle of movement ,les than 30 degrade mostly.
Are you shure those joints stay allways below there limits.
regards

Yes, you can set the max limits for all angles in software.

[tronicgr]

Jrk's do have firmware bugs. It is very easy to bring them into self vibration. Therefore it is very hard to setup a responsive street feeling like the SCN5. I asked often to join the beta group and compare this interfaces and compare this interfaces. It is not correct to hype a single interface without comparing in a group what we do here, the high resolution plugin is very young without the needed response. However for the first try a JRK is not bad but comes with restrictions. The price for one motor is high compared to a DIY solution which gets updates or are directly editable.
I have compared the many PID algorithm out of the robotic forums around the world. It seems that the most do work with integer instead of floats because of 8 bits. The result was the open source firmware because arduino use floats. It is based on the most followed PID algorithm out of the robotic sector.
I hope the new interface out of the robot combat section, the Kangaroo, will be come with a better algorithm.

Maybe a good parameter to think of before buying motors/actuators is the cost per HorsePower in combination with speed m/s ... (that includes power supplys/batteries/motor_drives).

[yokoyoko]

Jrk's do have firmware bugs. It is very easy to bring them into self vibration.

That's true - I experienced the same!

Therefore it is very hard to setup a responsive street feeling like the SCN5

At this point I have to disagree. Sure the SCN5 are "engineering porn" but even with the jrk's and a "fitting" PID you can get a responsive street feeling (you just have to know the limits!).

I asked often to join the beta group and compare this interfaces and compare this interfaces. It is not correct to hype a single interface without comparing in a group what we do here

Exact!!! Good point. Still hard to find a way how to compare the interfaces.

the high resolution plugin is very young without the needed response.

In my opinion it is working great. It is defenatly a great improvement to the uso settings! --> it works much better (especially for "road feelings")

I hope the new interface out of the robot combat section, the Kangaroo, will be come with a better algorithm.

sounds intersting!

[x1610]

Hi

Thanos whrote

Maybe a good parameter to think of before buying motors/actuators is the cost per HorsePower in combination with speed m/s ... (that includes power supplys/batteries/motor_drives

I agree,VFD are a cheap and good solution.
I must pay 240,00 euro for a VFD and 1Hp motor,with Dc i cant make that force for that money.
But the company adviced me not to go the VFD way,because high voltage danger,they recomend skilled people for VFD.
For now i dont know wich way to go.
Will the high voltage danger be solved when i insulate motor from simulator?
Please some advice from more skilled people.

[kermit]

Hi,
I have 2 ac motors(0,75 kw 3 phase 230 v) with a gearbox I = 30 means at 1500 rpm will give about 50 rpm ,
with max load about 250 kg each.
I will be using 2 frequent inverter
I want to use it for a moving platform with a cessna cockpitsection
(total weight incl pilot about 450 kilogram calculated force needed about 200 kg because the pilot sits offset about 55 cm from pivotpoint)
on top of a pivot , with only an Y and x(2 Dof) direction for now already build.
Maybe in the future a 3 dof.

I have treid a velleman K8055 board but with no luck ,
so I have ordered an AMC 1.6 from one of the members ( it was taken by customs ), so now I have to wait.
I have ordered an pmw to volt (0-5 to 0-20 mA)device, but will it be enough to drive the platform or will I need something else?

I`m planning to build a electric cabinet with all the components to make it safe and build for home current of 50 HZ 230 volts
SORRY for hyjacky your post
regards Kermit

[tronicgr]

Hi

Thanos whrote

Maybe a good parameter to think of before buying motors/actuators is the cost per HorsePower in combination with speed m/s ... (that includes power supplys/batteries/motor_drives

I agree,VFD are a cheap and good solution.
I must pay 240,00 euro for a VFD and 1Hp motor,with Dc i cant make that force for that money.
But the company adviced me not to go the VFD way,because high voltage danger,they recomend skilled people for VFD.
For now i dont know wich way to go.
Will the high voltage danger be solved when i insulate motor from simulator?
Please some advice from more skilled people.

Its perfectly safe. On the 6DOF on the next photo, all six ac motors are connected to the metal frame with no voltage leakages. And as extra safety measure the frame was grounded.

6DOF_monitors_mounted.jpg (574.05 KiB) Viewed 3512 times

http://motionsim.blogspot.com/2013/04/some-photos-of-6dof-platform.html


Thanos

[tronicgr]

I have treid a velleman K8055 board but with no luck ,
so I have ordered an AMC 1.6 from one of the members ( it was taken by customs ), so now I have to wait.
I have ordered an pmw to volt (0-5 to 0-20 mA)device, but will it be enough to drive the platform or will I need something else?

I`m planning to build a electric cabinet with all the components to make it safe and build for home current of 50 HZ 230 volts
SORRY for hyjacky your post
regards Kermit

Yes, It would be better if you open a new thread with your project.

I'm not sure if a converter to 0-20mA can work linear, never tried it. Its recommended to use true analog output 0-10v for the speed and 0-24v for the direction signals.

Thanos

[telfel]

Hi

Will the high voltage danger be solved when i insulate motor from simulator?
Please some advice from more skilled people.
x1610

All metalwork requires to be bonded to earth, don't rely on ball / universal joints to provide an earth path.

230 / 240 volt can kill you. and the 3 phase at 380 / 414 volt will if you get it wrong, if you don't know what you are doing get a qualified electrician to check it over. The higher the voltage the greater the current, and you only need a small current to kill you.

3 phase motors / voltages are not meant for domestic use, you need to pay attention to cable size and length and not use extension leads.

regards Terry