The SimFeedback-AC DIY Motion Simulator thread

HoiHman

500RPM
Premium
Reïntroducing the SimFeedback service mode, for unknown reasons it does seem to be working fine on the latest simfeedback release.

I have been using it all week when i was working on my rig, having it raised in its highest position. It still amazes me how much clearance you actually need with a 49" monitor especially with roll left and right. :cool:

Use with caution, links can be found in the SimFeedback discord channel. Leave a comment if it works for you or not.

 

Steve D

500RPM
Premium
@Ekay_Jay

1.Ensure that you route the USB cable as far from the motor controllers and servos as possible.

2. Try different USB ports and / or use a good quality powered USB hub. If you have a lot of USB devices to accommodate, consider installing a dedicated PCI card to help spread the load.


3. Properly balancing all USB devices across different USB controllers is also considered good practice. This can be down to trial and error or you can use USB View for a more scientific approach. It's cumbersome but useful once you understand what you are looking at!


4. Look at your USB Power Management settings. (Device Manager / Universal Serial Bus Controllers) Look for Root Hubs and Host Controllers and select Properties / Power Management. Untick 'Allow the computer to turn off this device to save power' if enabled. You can always switch back if you experience any issues.

4. Add a large ferrite core around the USB cable. A good few of us have used them successfully to overcome EMI issues that were affecting our HMDs where base stations are used for tracking. (I.e. Vive, Pimax, Index) However I've known builders to wrap their Arduino USB cables through them, (four or five winds), as a 'belt and braces' approach to avoid potentially random disconnects caused by EMI. Might be worth a try.


Good luck.
 
@Ekay_Jay

1.Ensure that you route the USB cable as far from the motor controllers and servos as possible.

2. Try different USB ports and / or use a good quality powered USB hub. If you have a lot of USB devices to accommodate, consider installing a dedicated PCI card to help spread the load.


3. Properly balancing all USB devices across different USB controllers is also considered good practice. This can be down to trial and error or you can use USB View for a more scientific approach. It's cumbersome but useful once you understand what you are looking at!


4. Look at your USB Power Management settings. (Device Manager / Universal Serial Bus Controllers) Look for Root Hubs and Host Controllers and select Properties / Power Management. Untick 'Allow the computer to turn off this device to save power' if enabled. You can always switch back if you experience any issues.

4. Add a large ferrite core around the USB cable. A good few of us have used them successfully to overcome EMI issues that were affecting our HMDs where base stations are used for tracking. (I.e. Vive, Pimax, Index) However I've known builders to wrap their Arduino USB cables through them, (four or five winds), as a 'belt and braces' approach to avoid potentially random disconnects caused by EMI. Might be worth a try.


Good luck.
So I disconnected everything. Started from scratch on all my wiring. Rehooked everything back up and viola, everything works.
 

Michael Roitman

50RPM
Premium
@Ekay_Jay

1.Ensure that you route the USB cable as far from the motor controllers and servos as possible.

2. Try different USB ports and / or use a good quality powered USB hub. If you have a lot of USB devices to accommodate, consider installing a dedicated PCI card to help spread the load.


3. Properly balancing all USB devices across different USB controllers is also considered good practice. This can be down to trial and error or you can use USB View for a more scientific approach. It's cumbersome but useful once you understand what you are looking at!


4. Look at your USB Power Management settings. (Device Manager / Universal Serial Bus Controllers) Look for Root Hubs and Host Controllers and select Properties / Power Management. Untick 'Allow the computer to turn off this device to save power' if enabled. You can always switch back if you experience any issues.

4. Add a large ferrite core around the USB cable. A good few of us have used them successfully to overcome EMI issues that were affecting our HMDs where base stations are used for tracking. (I.e. Vive, Pimax, Index) However I've known builders to wrap their Arduino USB cables through them, (four or five winds), as a 'belt and braces' approach to avoid potentially random disconnects caused by EMI. Might be worth a try.


Good luck.
I saw this post of yours and noticed the ferrite core. I've tried smaller ferrites and it hasn't seemed to help with my rig. I have the Valve Index and I only get gray-outs when I touch the front of the HMD where the sensors are. It's rare but I may occassionally see a random gray-out for a second and if I touch the cable, it goes away also.

I've shielded 3 of the 5 motor cables from my actuators so far, but it still hasn't helped (i ran out of shielding tape but I finished the actuators on the side where my Index's cable is).

I've noticed that if I move further away from the rig, i won't get gray-outs, and this only happens if my drivers are turned on... When the motion rig is completely off, it doesn't happen at all.

I also noticed that if I stand next to my rig, put a foot on the Traction Loss platform, i'll get a gray-out as well... as if the entire platform is emitting EMI or something.

I ordered the large/thick ferrites as well, and I'll try those when they come, but I'm not sure it'll help. Do you know anyone with a Valve Index that had this issue completely fixed (or at least made it less sensitive to the gray-outs)?
 

Tronicgr_6DOF

250RPM
Premium
I saw this post of yours and noticed the ferrite core. I've tried smaller ferrites and it hasn't seemed to help with my rig. I have the Valve Index and I only get gray-outs when I touch the front of the HMD where the sensors are. It's rare but I may occassionally see a random gray-out for a second and if I touch the cable, it goes away also.

I've shielded 3 of the 5 motor cables from my actuators so far, but it still hasn't helped (i ran out of shielding tape but I finished the actuators on the side where my Index's cable is).

I've noticed that if I move further away from the rig, i won't get gray-outs, and this only happens if my drivers are turned on... When the motion rig is completely off, it doesn't happen at all.

I also noticed that if I stand next to my rig, put a foot on the Traction Loss platform, i'll get a gray-out as well... as if the entire platform is emitting EMI or something.

I ordered the large/thick ferrites as well, and I'll try those when they come, but I'm not sure it'll help. Do you know anyone with a Valve Index that had this issue completely fixed (or at least made it less sensitive to the gray-outs)?
Have you thought to use ferrite on the servo power cable? Its recommended in many servo manuals...
 

Steve D

500RPM
Premium
I saw this post of yours and noticed the ferrite core. I've tried smaller ferrites and it hasn't seemed to help with my rig. I have the Valve Index and I only get gray-outs when I touch the front of the HMD where the sensors are. It's rare but I may occassionally see a random gray-out for a second and if I touch the cable, it goes away also.

I've shielded 3 of the 5 motor cables from my actuators so far, but it still hasn't helped (i ran out of shielding tape but I finished the actuators on the side where my Index's cable is).

I've noticed that if I move further away from the rig, i won't get gray-outs, and this only happens if my drivers are turned on... When the motion rig is completely off, it doesn't happen at all.

I also noticed that if I stand next to my rig, put a foot on the Traction Loss platform, i'll get a gray-out as well... as if the entire platform is emitting EMI or something.

I ordered the large/thick ferrites as well, and I'll try those when they come, but I'm not sure it'll help. Do you know anyone with a Valve Index that had this issue completely fixed (or at least made it less sensitive to the gray-outs)?

Hi Michael,

Yep, I'm a Valve Index user and experienced grey outs when touching the sides / top and sometimes even a temporary black screen mid-race. Same applied when I had the Pimax.

Winding the HMD cable five times around the large ferrite core, (see pic below), completely sorted the issue for me and it's proven successful for others as well. Not in all cases though so it isn't a guaranteed fix. To do that you'd probably need to go the grounding route but I've not had to.

Also make sure that the HMD cable is as far away from the servos / servo cables etc as possible. I actually suspend mine away from the rig.

1573381995554.png
 
Last edited:

Spikar

10RPM
What's everyone using for Cura settings for printing the parts?
I've set a profile I'm happy with for my prints... but having a look at the instructions I can't add the extras that it advises.

Cura doesn't allow for a solid layer every x ("include solid diaphragm every __ layers")

Also where to find settings in cura to to allow top "20" layers for example be solid.

:)
 

Michael Roitman

50RPM
Premium
Hi Michael,

Yep, I'm a Valve Index user and experienced grey outs when touching the sides / top and sometimes even a temporary black screen mid-race. Same applied when I had the Pimax.

Winding the HMD cable five times around the large ferrite core, (see pic below), completely sorted the issue for me and it's proven successful for others as well. Not in all cases though so it isn't a guaranteed fix. To do that you'd probably need to go the grounding route but I've not had to.

Also make sure that the HMD cable is as far away from the servos / servo cables etc as possible. I actually suspend mine away from the rig.

View attachment 333911
Thank you. I put about 7 or 8 small ones on mine and looped thru a larger ferrite core twice. Ill try the big ferrite when i get it. Thank you
 
Hi all,

I was wondering if anyone here has the means to help me out with printing SFX100 parts. I don't have the means or budget to set up my own 3d printer but am happy to help pay for materials and time if someone more experienced in here is happy to offer. I could also help with designing custom parts for rigs in CAD if that is of interest.

I'm located in Australia. Thank you!
 

Spikar

10RPM
Hi all,

I was wondering if anyone here has the means to help me out with printing SFX100 parts. I don't have the means or budget to set up my own 3d printer but am happy to help pay for materials and time if someone more experienced in here is happy to offer. I could also help with designing custom parts for rigs in CAD if that is of interest.

I'm located in Australia. Thank you!
PM me dude.
I'm in Aus.
Happy to help out.
Currently going to start printing my parts too.
 
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