How many axes is too many axes?

General
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So my SR6 had a servo die recently and whilst it did survive a good time, it did not survive a long time.

Weighing up fixing it myself or moving on to another machine, I have been looking up at my options.

I still own a Handy and an FSR1, they do fine but are single axis, and I think after using the SR6 for a while, I might find myself wanting a little more sometimes.
Though for money, enjoyment or just wanting the thing to last longer than a few months, I have been a bit torn on what to go for.

Currently leaning towards the OSR2+, when I think about what I liked from the SR6 and what didn’t really bother me, the pitch R2 access felt like it added the most, and the surge and sway L1 and L2 axes from the SR6 felt like they didn’t really add to my enjoyment.
Twist and T-Valve R0 and A1 were somewhere in between, I could take them or leave them.

Wondering what everyone elses thoughts are, from either a user or a scripters perspective, are there any axes that you think give you trouble? Any that you have tried and can never go back, or that you have tried and will never go back to?

As a bonus shoutout as I mentioned that I was thinking about the OSR2+, every time I see @g90ak drop a set I do catch myself getting tempted :eyes: if you were in the market for an OSR2+ I would suggest checking out their latest post here: https://discuss.eroscripts.com/t/g90ak-osr2-drop-8-0-same-day-shipping/273700

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Dropping in to say thank you for the shout out :slight_smile: and give my (biased) opinion. Full disclosure as you know - I sell OSR2+s, so please take my opinion with a BIG grain of salt.

I find multi-axis SO important. No matter how good a single axis stroker is, it still feels extremely robotic to me. There aren’t many sex acts that follow a perfect linear axis - pretty much all of them have uneven pressure or motion, even if it extremely slight.

Having built about 10 SR6s in my sexbot tinkering career, I have a really hard time recommending them to most people. They have nearly double the amount of potential mechanical failure points and are much harder to assemble and repair. Additionally, active cooling is almost required, as the servos are packed so tightly, there isn’t much room for passive cooling. Double the # of servos is double the amount of noise too. Also, like you, I found that the “surge” didn’t add a whole lot to the experience.

However, it’s not all bad with the SR6, the weight of your sleeve is distributed across more servos, which hypothetically would lend to longer lifespan. I would still recommend SR6s for people that use heavy sleeves and use extremely intense scripts.

I find the OSR2+ to be the best balance between extreme complexity and simple and serviceable design. They’re much easier to work on and repair. It still provides a VERY good multi-axis experience with less noise and cost. I would take an OSR2+ with expensive servos over a SR6 with cheap servos ANY DAY OF THE WEEK. Moving between my SR6s and the OSR2+, I don’t feel like I’m missing much, where as moving between my OSR2+ and the Handy, it is unbearable :slight_smile:

As far as twist and the valve, definitely not worth the added complexity, noise, and weight. There are passive valve caps you can screw onto your Fleshlight if you really like that suction sensation. I know that some people SWEAR by the twist, but I really am not in that camp. I think that the concept is SUPER intriguing - to the point that I build myself a twist every time there is a design revision - but they never stay installed on my unit very long.

So long winded way of saying OSR2+ is the right amount of axes in my humble opinion. Not a sales pitch at all - there are a lot of great OSR2+'s out there. I just think it’s the perfect intersection of performance and simplicity.

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Question about noise level or devices
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Simple Consumer here. By now I have tested several devices, and I still always come back to my SR6. Having more than a single Axis just adds a lot to it.
From my experience what adds the most for me is the twistmodule, but this highly depends on the sleeve I use.
Least necessary seems to be the sway for me. Sure, it feels surprising, but it´s rarely scripted, for randomized settings it gets a bit too wild for my taste and compared to the pitch the effect doesn´t affect the fun as much. Had the T-Valve, too, but only used it once because it was too loud compared to the other servos, to the point it got annoying.
So I can say, SR6 might be my favorite, but I would also return to a OSR2+ if it completely burned out. Currently need to replace at least one servo, the device jittering at times because the right servos no longer seem to be able to hold position 100% (downside of many servos, leading to many points of failure). Still, if given the choice I would stay at the SR6.
What I would likely never return to as a “main” device is a single axis one; after experience the more complex movements I would simply miss them, especially thinking of well crafted multi axis-scripts.
Not sure if this helps, just giving my input. I´m just looking forward how the devices will evolve over the next few years.

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User here. Mostly have experience with Keon then I bought g90’s osr2+ and then I aftermarket modded it to have a Twist receiver.

Pitch/Roll is the bare minimum for multi-axis strokers and just getting an OSR will probably be enough for a majority of the people looking to get into it.

Twist adds a lot of intensity to scripts but not necessarily realism so its good but its not as crucial as Pitch/Roll. Its not necessary but its the interim b/t upgrading from an OSR to an SR6.

Surge/Sway from what I understand adds lateral movement(forward/back and left/right), so it adds another dimension but I’m not sure that its worth about double the price of an OSR. If money’s not an issue, then go ahead and buy the most expensive stroker commonly used by the community. But I wouldn’t ever recommend this for price conscious people.

The T-Valve can more or less be substituted by the Boost Suction cap, which is literally just a modified fleshlight end cap with a rubber lip piece that restricts air flow on upstrokes. I assume its not as strong of a suction compared to w/e mechanic the t-valve works off of, but its probably much cheaper than a t-valve and is easier to replace if something breaks.

tldr; OSR2 with pitch/roll is the best device price to performance wise. Get a boost suction cap to emulate a t-valve. Get twist added to the OSR if you really want something intense.

If money’s not an issue, suction cap+twist+sr6.

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I have no idea what a boost suction cap is, but I made a T-Valve and I cannot tell a difference with it running (it’s entirely possible my rubbish printing quality is affecting it).

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So I have an OSR2+Twist and because I like to tinker and experiment with some motors and drives, am doing a long-term re-design and upgrade to a SR6+Twist.

Twist & Pitch
For me, the axes that add the most are pitch and twist. But they have to be done well.
For the twist I just did an experiment with music-based scripting for the community event which seemed to work to mostly add stimulation. But there’s also the possibility to vary stimulation for slower movements like in BJs. From a scripting perspective, you try and emulate real-world movements with the number of axes you have. And the twist is a welcome possibility to do so and get some variation. While the Pitch axis can change the “pressure” patch and therefore shift the stimulation, if done correctly. Fair warning though: Depending on the version of the twist, they can get loud as hell.

Valve
Regarding the Valve (modded version effectively functioning like a piston valve) I want to throw in an aspect, one would not think of at first: The added power needed to do a stroke. While the small valve servo almost needs no power at all, I’ve done some measurements. I’ve set it to close for upwards motions, and open for downwards motions. Compared to leaving it open the whole time, it took almost twice the peak power at the same speed and stroke length for the upwards motion. Which has implications on your power source, but also means more load for the main servos and with that more heat. Of course this varies depending on sleeves, lube, etc. The main advantage I see from the valve (even more than the added stim) is cleanliness. The lube doesn’t run out as much (sleeve dependent) when there’s an under-pressure in the sleeve.

Surge & Sway
Just in theory. If I have to think about what surge and sway might add, I’d say it’s more of an extension to pitch and roll, in that the pressure patch can be shifted more nicely, but I don’t expect the change to be earth shattering. Especially considering there aren’t very many scripts with surge/sway, since with the tools we have now, scripting them is time-intensive.

@g90ak: I have to make some calculations on this, but with how the SR6 kinematics are designed, shouldn’t the load on a single servo be smaller? I would then expect less wear, noise and thermal losses within one servo (still should tackle the cooling issue though - with how the frame is designed, they have no exposed surfaces).

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Yep!

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:face_with_open_eyes_and_hand_over_mouth: I think I might need some different glasses.

Thank you.

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Suction Control Case
I was calling it the boost suction cap cause it came on the Boost line of fleshlights till they started selling the case as its own separate thing. Technically all you need is the end cap cause it works with other cases including the Keon line of cases.

It works basically the same as a T-Valve but instead of relying on a servo to open and allow air in/out, physics just does the same thing. Cause from what I understand the T-Valve opens the hole on a down stroke to let air out, and closes it on an upstroke to prevent air from escaping for a suction effect. The suction case cap does the same but instead of relying on a servo to do it, physics does it. On a downstroke air is pushed out against the rubber bit so air goes out, but on an upstroke it pulls in but the rubber bit is covering the vent so it can’t escape resulting in the suction/tighter feel.

The suction case and T-valve do require more air tightness in order for the air to not escape out of unintended vents. So that might be your issue if you can’t feel it.

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Just had a look and it looks like they don’t sell those cases on their own here so I would need to buy a Boost. Might consider getting one to try.