6DOF motion sim with servomotors

new

« Prev
1
Next »

dureiken74
New Member

Posts: 6

6DOF motion sim with servomotors Aug 27, 2017 12:02:53 GMT

Quote

Post by dureiken74 on Aug 27, 2017 12:02:53 GMT

Hi,

first of all thanks for this forum and for thanos help my email.

I am starting a new project, as said in the title : 6DOF motion platform with servomotors for flight sim in VR.

I will use this kind design : x-sim.de/forum/viewtopic.php?t=1599.

I would like 400mm heave, 120° of motor rotation, 6DOF, 35° pitch/roll :

In term of angle :

What gives me 450cm for platform radius :

Mobile :

Fix :

In a vertical plan (trying 2D before 3D), does the neutral position should be like this :

Or should I put the axis of fixation at the middle of lever, like this ?

I think I'm wrong because after having done all of this, I only have 15° of roll

Thanks for your help guys !

Last Edit: Aug 27, 2017 12:03:30 GMT by dureiken74

dureiken74 New Member Posts: 6	6DOF motion sim with servomotors Sept 17, 2017 9:01:15 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by dureiken74 on Sept 17, 2017 9:01:15 GMT Hi not a lot of help here I am wondering about linear actuator sensor, what would be your advices ? thanks a lot

tronicgr
Moderator

Posts: 868

6DOF motion sim with servomotors Sept 18, 2017 18:46:40 GMT via mobile

Quote

Post by tronicgr on Sept 18, 2017 18:46:40 GMT

Sept 17, 2017 9:01:15 GMT dureiken74 said:

Hi

not a lot of help here

I am wondering about linear actuator sensor, what would be your advices ?

thanks a lot

Hi,

Sorry for not much participation on my side, too busy with kickstarter fulfilment these days.

For linear actuators, you can use a linear potentiometer if you like, fitted in parallel to your actuator cylinder:
m.aliexpress.com/s/item/1938754939.html?trace=wwwdetail2mobilesitedetail&productId=1938754939&productSubject=Linear-Potentiometer-Position-Feedback-Sensor

Otherwise you would have to use some gears and interface normal rotational potentiometers. Like a 10turn potentiometer.

Or use a string potentiometer like the one i describe on my thingverse:
www.thingiverse.com/thing:1926226

Thanks
Thanos

motionsim.blogspot.com/
www.youtube.com/user/tronicgr

dureiken74
New Member

Posts: 6

6DOF motion sim with servomotors Sept 18, 2017 19:08:54 GMT

Quote

Post by dureiken74 on Sept 18, 2017 19:08:54 GMT

Sept 18, 2017 18:46:40 GMT tronicgr said:

Sept 17, 2017 9:01:15 GMT dureiken74 said:

Hi,

Sorry for not much participation on my side, too busy with kickstarter fulfilment these days.

For linear actuators, you can use a linear potentiometer if you like, fitted in parallel to your actuator cylinder:
m.aliexpress.com/s/item/1938754939.html?trace=wwwdetail2mobilesitedetail&productId=1938754939&productSubject=Linear-Potentiometer-Position-Feedback-Sensor

Otherwise you would have to use some gears and interface normal rotational potentiometers. Like a 10turn potentiometer.

Or use a string potentiometer like the one i describe on my thingverse:
www.thingiverse.com/thing:1926226

Thanks
Thanos

thanks for your answer

could you please put aliexpress link ? doesn't work at home

thanks

tronicgr Moderator Posts: 868	6DOF motion sim with servomotors Sept 20, 2017 13:28:01 GMT via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tronicgr on Sept 20, 2017 13:28:01 GMT pt.aliexpress.com/item/Linear-Potentiometer-Position-Feedback-Sensor/1938754939.html?trace=msiteDetail2pcDetail
	motionsim.blogspot.com/ www.youtube.com/user/tronicgr

dureiken74 New Member Posts: 6	6DOF motion sim with servomotors Sept 21, 2017 18:45:55 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by dureiken74 on Sept 21, 2017 18:45:55 GMT ok thanks what is the input for the card ? could this work : www.sparkfun.com/products/10932 ? thanks

tronicgr
Moderator

Posts: 868

6DOF motion sim with servomotors Sept 25, 2017 20:27:55 GMT wannabeaflyer likes this

Quote

Post by tronicgr on Sept 25, 2017 20:27:55 GMT

Sept 21, 2017 18:45:55 GMT dureiken74 said:

ok thanks

what is the input for the card ?

could this work : www.sparkfun.com/products/10932 ?

thanks

I have links with compatible sensors on my blog:
motionsim.blogspot.com/p/links-and-info.html

The AMC1280USB can accept input from absolute position sensors like these:

a. Analog 10-bit Magnetic contactless position sensor 180 degrees: www.digikey.com/product-detail/en/6127V1A180L.5FS/987-1392-ND/2620661 (Preferred with AC motors or DC motors with crank arm gearbox like this). You can see these next to the AMC1280USB controller on the photo here.
There is a better quality version of this sensor with ball bearings that costs more but its durable to axial loads:
www.digikey.com/product-detail/en/6153V1A180L.5/987-1602-ND/3945841

b. Analog 10-bit magnetic contactless 10-turn position sensors for linear actuators:
www.digikey.com/product-detail/en/bourns-inc/AMM20B5 A1CLASL380/AMM20B5A1CLASL380-ND/3868206
Or
www.digikey.com/product-detail/en/bourns-inc/3590S-2-103L/3590S-2-103L-ND/1088586
3D printed String Potentiometer housing
www.thingiverse.com/thing:1926226

c. DIGITAL ENCODER ABS MAGNETIC 12-BIT 6MM - AEAT-6012-A06
www.digikey.com/product-detail/en/broadcom-limited/AEAT-6012-A06/516-2341-ND/2210458
3D printed Mounting: www.thingiverse.com/thing:1926094
And 3D printed mount on the gearbox: www.thingiverse.com/thing:2068945
As described here: motionsim.freeforums.net/post/4071/thread
More info about them: motionsim.freeforums.net/thread/234/firmware-2-beta

The Quadrature encoder on the sparkfun link you gave is not directly compatible, but I currently work on a solution to be able to interface them on the AMC1280USB using adapter circuit that will convert the quadrature signals to 0-5v analog absolute position signal, or Digital 12-bit position signal SSI formated:
www.youtube.com/watch?v=YAMiNQbyI2s
www.youtube.com/watch?v=o9sfpkQphaY

This adapter solution will allow easier interface with SERVOMOTORS by using their internal Quadrature sensors. You will only need to place two limit switches on the motor travel endstops for the quadrature sensor calibration, It could be done with hard-hit stops but prefer not using possible destructive solutions.

Thanks
Thanos

Last Edit: Sept 25, 2017 20:29:04 GMT by tronicgr

motionsim.blogspot.com/
www.youtube.com/user/tronicgr

dureiken74 New Member Posts: 6	6DOF motion sim with servomotors Oct 22, 2017 11:42:17 GMT Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by dureiken74 on Oct 22, 2017 11:42:17 GMT Hi I just bought hall effects parts and tried to print your 3D files thanks for the work but when I use stl file with slicer there are a lot of bugs could you export it once again ? thanks

billo2404
Full Member

Posts: 150

6DOF motion sim with servomotors Feb 12, 2018 2:43:26 GMT

Quote

Post by billo2404 on Feb 12, 2018 2:43:26 GMT

Aug 27, 2017 12:02:53 GMT dureiken74 said:

Hi.......

I think I'm wrong because after having done all of this, I only have 15° of roll

Thanks for your help guys !

Credo che l'errore sia dato dall' errata posizione di partenza della leva che non deve essere parallela al pavimnto ma formare un angolo di 90 gradi con l' asta. I motori a SX sono circa alla posizione di partenza, i centrali errati e a DX possono alzarsi di più

I think the error is given by the wrong starting position of the lever that does not have to be parallel to the floor but to form a 90 degree angle with the rod. The SX engines are about the starting position, the wrong control units and DX can get up more

Shoutbox

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

tronicgr: New blog post: motionsim.blogspot.com/2018/02/using-linear-ac-servomotor-actuators.html Feb 10, 2018 17:05:15 GMT

lovepenchant: hey i have a question Mar 30, 2018 11:35:43 GMT

lovepenchant: is this free forum ? Mar 30, 2018 11:35:53 GMT *

whereiswaldo: does someone know a lot about drivers of ac servo's? Dec 4, 2018 20:24:44 GMT

tronicgr:
New Firmware release v3.5

Read details here:
motionsim.blogspot.com/2018/12/amc1280usb-firmware-v35-release.html
Dec 15, 2018 22:57:47 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

tronicgr: Sorry for been away from this forum for some time now. Check out new firmware that supports real AC servomotor on the standard AMC1280USB: motionsim.blogspot.com/2019/05/new-firmware-for-easy-aasd-15a.html Jun 1, 2019 21:43:12 GMT *

Theuns: Hi Marko. Theuns from Brisbane. It's no easy to find the correct motors in Brisbane and if you do it's expensive. Did you find some motors for your simulator Jun 23, 2019 2:31:34 GMT

tronicgr: Hey guys,this forum is now outdated, please join my Discord server discord.gg/bx4PxYR Dec 20, 2020 6:23:50 GMT

jeanmarcfr69: Bonjour Thanos Apr 12, 2021 6:56:31 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

hfj68: Hello! I'm a newcomer and a complete novice entering uncharted territory. I'm thinking of mounting a Cessna 172 or 182 cockpit simulator with three screens on a 6DOF platform. I don’t know anything about engineering, coding, and technical. How do I start? Oct 25, 2023 18:48:47 GMT