Force FeedBack Yoke V2

Hello Jay,

Congratulation for your superb work.
Do you have any update about you FFB V2?

Kind regards, and Happy new year.

Maurice

Hi and happy new year to you too
I haven't got news to report quite yet. The v2 is still under development so hopefully you'll see some updates on the web really soon.

Thanks for your support
Jay

Hi Jay,

also congrats for the great work from my side!

I have a month time at hand now and would like to look into your V2 project. I don't want to push you or anything but could shed some light on the basic components you have used or you are planning on using?

For the V-Rails I have found most parts in these shops (for european clients): http://makersupplies.dk/25-linear-rail or https://tronixmaker.com/en/67-v-slot-rails
They also offer cutting them as I figured you have used custom lengths deviating from the standard 250mm, 500mm, etc.

A bit more problematic is the Banebots Gearbox. Which reduction do you use? They reach up pretty freaking far... I am kind of worried about overheating problems in the motors or H-Bridges....

For the transmission you use standard belts and gears. Do you use stopper buttons to control the x an y motion ranges or did you manage to keep the gear ratios in line with the original MSFF2 angular travel ranges for the motors?

For mounting the central yoke shaft to the gantry plate the bearings in your pic seem viable and very efficient although some sort of riser has to be used in combination with standard steel motor mounting plates. I believe it also wouldn't be too expensive to have that riser milled from aluminum.....


Thx

Konstantin

deckerd wrote:Hi Jay,

also congrats for the great work from my side!

I have a month time at hand now and would like to look into your V2 project. I don't want to push you or anything but could shed some light on the basic components you have used or you are planning on using?

For the V-Rails I have found most parts in these shops (for european clients): http://makersupplies.dk/25-linear-rail  or https://tronixmaker.com/en/67-v-slot-rails
They also offer cutting them as I figured you have used custom lengths deviating from the standard 250mm, 500mm, etc.

A bit more problematic is the Banebots Gearbox. Which reduction do you use? They reach up pretty freaking far... I am kind of worried about overheating problems in the motors or H-Bridges....

For the transmission you use standard belts and gears. Do you use stopper buttons to control the x an y motion ranges or did you manage to keep the gear ratios in line with the original MSFF2 angular travel ranges for the motors?

For mounting the central yoke shaft to the gantry plate the bearings in your pic seem viable and very efficient although some sort of riser has to be used in combination with standard steel motor mounting plates. I believe it also wouldn't be too expensive to have that riser milled from aluminum.....


Thx

Konstantin

Hi
Please be patient, the v2 is on the way. I won't give you guys the list of materials and components before I have a working prototype. A simple reason for this, you will waste your money as the list is changing a lot as the development progresses.
I wish you could see how much parts and 3d prints I wasted making v1 yoke;)

Seriously, please be patient.
Jay

Hi Jay,

got it, will be patient. I was trying to start a theoretical discussion, though. As I understand the tradeoff in the concept is between strong forces (= high reduction ration = high stall torque) and speed of axis movement (=high rpm). So if the MSFFB2 Johnson motors are comparable to these: http://www.electronics-online.com/media/mconnect_uploadfiles/HC313G-011/HC313G-011.pdf , which seems reasonable, we get something like that:
Motor Stall Torque: 20 mNm
P60 26:1 : Torque 0,52 Nm
20mm diameter pulley: Force 52N or roughly 5.3kg
That's pretty good but with 7200 No Load rpm we end up with 277 rpm on the gearbox shaft, probably less.

Taking into account that we will be adding additional pulleys (at least to the yoke shaft) things start to get a little finicky.... So printed ABS pulleys might be better for fine tuning the prototype.
Also in my opinion, for non-aerobatics flying the only time you need really strong forces is for pitch while flaring to land. In straight and level flight very strong pitch forces rather indicate bad trim, which shouldn't occur too often. Therefore a lower reduction (ie. 16:1) in combination with a passive "spring buffer" at the last 3rd of the shaft might be preferable. It also helps the pitch not to get stuck at the end of the travel range.

As for the riser, I was thinking that a piece of V-Rail bolted to the gantry plate might be the cheapest, sturdiest and most versatile option to mount the bearings and motor brackets.

Anyways, just food for thought.....

regards,
konstantin

Hi Jay,
read a post, dated August, in which it seems you're stuck somewhere .... So, really no chances to see the V2 come to life ?
I was really happy with the V1 but V2 seemed really a great improvement and really missing it.
Any Chance ?

Thinking about giving the 16:1 Planetary Gear 300w 24v brushless dc combo a try for the FFB anti-torque pedal setup. From what I've read it will net roughly around 50 lbs. torque with the correct PCB. For the cyclic I will try the Microsoft Sidewinder Force Feedback 2 mod first before committing to motor upgrade. I think as long as I can net 20 lbs. of torque on the cyclic I'll be ok.

Jay could you provide a possible source for the cyclic stick (pipe) itself?