Spanking machine

Ideas and instructions how you can make your own bondage toys.
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occorics
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Spanking machine

Post by occorics »

The small spankingmachine i use with my web control box wasn't as strong as i'd like, so i tried and built my own one.
After a bit of trial and error, i have it working reliably...
20180218_121207.jpg
This is how it works:
- the arm is held by the electro-magnet, then the stepper motor tightens the bungee cord to the desired strength
- the magnet is turned off to stroke
- the bungee-cord is released again and the arm get's pulled back by the red cord until the magnet catches it and the micro-switch is closed
20180218_121231.jpg
the electronics are rather simple. On the left is a 350W / 40V power supply for the stepper. In the middle is a stepper-controller and the board on the right is just an I2C chip to interface the stepper-controller with my web-control box, read the switch and control the magnet.

The first test-drive left some nice welts, only problem is, that the machine tends to break canes...
20180218_120828.jpg
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

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my blog: https://owned-by-princess-shelle.blogspot.com
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Keyless
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Re: Spanking machine

Post by Keyless »

Yet another great piece of work. I wondered about bungee cord but thought it might not release the energy quickly enough. Clearly I was wrong! I'd be interested to know how big it is, what is the diameter of the wheel and how thick is the bungee cord and the cane? Is the cane made of fiberglass?

How do you manage to make so much stuff? Have you been chained up in your workshop? Great work anyway.
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Re: Spanking machine

Post by lj »

occorics wrote:
The first test-drive left some nice welts, only problem is, that the machine tends to break canes...
some people are just never satisfied !

just get stronger canes...
be a switch, double the fun :-)
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Re: Spanking machine

Post by occorics »

Keyless wrote:Yet another great piece of work. I wondered about bungee cord but thought it might not release the energy quickly enough. Clearly I was wrong! I'd be interested to know how big it is, what is the diameter of the wheel and how thick is the bungee cord and the cane? Is the cane made of fiberglass?
the whole thing is about 30x70 cm. Wheel diameter is 15 cm and the bungee cord is 4mm. It comes from a Lafuma lawn-chair. With 4 strands, the acceleration is just right, but it needs quite some force to stretch it properly. Even with the stepper delivering up to 300 Ncm holding force, i had to use divert the paracord once to half the force. (it would help to drive the stepper with a higher voltage, but my current driver-board isn't rated for that). Good thing about that is, that the bungee-cord is still taut in the end-position, so it acts as a stop.

The cane is a 6 mm rattan cane. I have tried other sizes, but that one just feels best. I thought about fiberglass, but that might splinter. I have tried a crop with a nylon core, that works pretty good, if i can find a thicker one, that should be perfect.
Keyless wrote:How do you manage to make so much stuff? Have you been chained up in your workshop? Great work anyway.
I just love building things, it's a nice variety to my day-job as a software-developer... and the electronics and software are now very modular, so adding new stuff is easy.
But most of all, knowing how much Domina Shelle and Lady Helena love to use the devices on me keeps me motivated (and of course i'm having a lot of fun, too) :D
And there's more up my sleeves, stay tuned... :wink:
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
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Re: Spanking machine

Post by Keyless »

Thank you occorics. Most interesting.

I was hoping you were not using fiberglass as I had the same thought about splintering as you did. You said the tension in the bungee was large. I think the shaft on the motor is about 6mm diameter (3mm radius). If so, with 300Ncm I calculate that the total force in the 4 strands of bungee must be about 2000N or about 200kg! (300*10/3 N force in the cord, times 2 because you have doubled it back through the shackle, divided by 10 to convert to kg force) Have I got that right?

I as I said in another post, it would be interesting to have a system so that the victim would administer the strokes himself and he would not be released until the required number had been applied, however long it took. Of course it would require supervision and emergency release.

I'm thinking of Mistress Ks riding crop attached to a machine like that, me secured and Mistress K saying “right, 5 strokes (or 10 or 20), get on with it” and leaving me to apply them myself. That is a scary thought.

Thanks again - and I will stay tuned.
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Re: Spanking machine

Post by occorics »

Keyless wrote:Thank you occorics. Most interesting.

I was hoping you were not using fiberglass as I had the same thought about splintering as you did. You said the tension in the bungee was large. I think the shaft on the motor is about 6mm diameter (3mm radius). If so, with 300Ncm I calculate that the total force in the 4 strands of bungee must be about 2000N or about 200kg! (300*10/3 N force in the cord, times 2 because you have doubled it back through the shackle, divided by 10 to convert to kg force) Have I got that right?

I as I said in another post, it would be interesting to have a system so that the victim would administer the strokes himself and he would not be released until the required number had been applied, however long it took. Of course it would require supervision and emergency release.

I'm thinking of Mistress Ks riding crop attached to a machine like that, me secured and Mistress K saying “right, 5 strokes (or 10 or 20), get on with it” and leaving me to apply them myself. That is a scary thought.

Thanks again - and I will stay tuned.
Yes, your calculation is right. It's an 8mm shaft, but that doesn't change much... however, the 300Ncm are holding force only. I don't get the full acceleration due to the reduced voltage (i think it would need like 60V for full force), so the motor tends to slip back when the tension gets too high. From pulling by hand, i'd guess, the tension is around 20kg. I could drive the motor with half-steps to prevent the slipping better, but arming it already takes 18 seconds, so i went for a bigger motor instead.

I have already thought about a system like you describe and it would be easy to set up with the magnetic restraints on my spanking-bench. You could combine it with an Alexa similar to this clip: https://www.youtube.com/watch?v=7iKGUEowSE8
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

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my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
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Re: Spanking machine

Post by Keyless »

I love that video. Really interesting application of tech and they both seem to be having genuine fun rather than the usual actors playing a nasty dom and a scared sub. Have you seen the maze one? https://www.youtube.com/watch?v=fV0CUGwg9TM
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Re: Spanking machine

Post by occorics »

Yes! The maze is so cool!
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
OrgasmAlley
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Re: Spanking machine

Post by OrgasmAlley »

I have used fiberglass canes with my spanking machine (http://www.orgasmalley.com/som/index.htm) for maybe 15 years, without any splintering issues. I've used 1/4" through 5/8" diameter. Originally, I CA glued the ends after sanding them round, but haven't done that to any in years. The pneumatic system here accelerates with around 250 pounds of force (when used at 150 PSI), and IMX rattan will hold up for only brief use. Just a good word for fiberglass... although it doesn't deliver the feel of rattan.
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Re: Spanking machine

Post by occorics »

OrgasmAlley wrote:I have used fiberglass canes with my spanking machine (http://www.orgasmalley.com/som/index.htm) for maybe 15 years, without any splintering issues. I've used 1/4" through 5/8" diameter. Originally, I CA glued the ends after sanding them round, but haven't done that to any in years. The pneumatic system here accelerates with around 250 pounds of force (when used at 150 PSI), and IMX rattan will hold up for only brief use. Just a good word for fiberglass... although it doesn't deliver the feel of rattan.
Thanks for your input!
I'm going to experiment with different materials this weekend...
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
lj
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Re: Spanking machine

Post by lj »

have you tried Delrin ?

It is quite high density so the impact is harder than an equivalent diameter natural cane, and is very strong and most unlikely to break.

I once had a caning session with an ex-ProDomme friend, working through a wide range of canes starting with the gentle and light and ending up with the delrin versions - somewhere around 350 strokes in total and the warm-up ( ? ) from the previous 300 strokes made the delrin just a little less severe :shock:
be a switch, double the fun :-)
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Re: Spanking machine

Post by occorics »

lj wrote:have you tried Delrin ?

It is quite high density so the impact is harder than an equivalent diameter natural cane, and is very strong and most unlikely to break.

I once had a caning session with an ex-ProDomme friend, working through a wide range of canes starting with the gentle and light and ending up with the delrin versions - somewhere around 350 strokes in total and the warm-up ( ? ) from the previous 300 strokes made the delrin just a little less severe :shock:
that sounds like exactly what i'm looking for, i will give it a try... thank you!
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
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Re: Spanking machine

Post by occorics »

lj, you were so right about the Delrin canes...!

Lady Helena gave the machine a test-drive last night. The whole session was about deepening my desire to suffer for Her amusement, so She started with putting me in a light trance and than told me to put clothespins on my nipples and balls and stroke with deep heat while She caned me.
We used a 4mm Delrin rod which turned out to be a perfect. It's like a combination of the bite of a thin cane and the thud pain of a thicker one due to the weight. And it leaves very nice welts!
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
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Re: Spanking machine

Post by sub_anal_slut »

Hi there

That was a clever way of doing it !
I have played around with making it myself , but always an issue making a machine that can repeat it easily and not too complicated , strong enough , fast enough ,or big fast actuators..


Annie
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Re: Spanking machine

Post by occorics »

sub_anal_slut wrote:Hi there

That was a clever way of doing it !
I have played around with making it myself , but always an issue making a machine that can repeat it easily and not too complicated , strong enough , fast enough ,or big fast actuators..


Annie
Thank you! i have tried different designs, too, but with only some basic tools at hand, this principle was the easiest to build. It could only be a bit faster, it currently needs around 20 seconds to arm. And it's a bit too loud due to the vibrations of the stepper-motor, but i think that can be solved. Cool thing is that the stroke itself makes almost no noise, so you can't prepare yourself for the impact...
Only issue left is that the motor sometimes skips steps when it's close to the full tension. I'm thinking about adding a counter-weight on a rope that winds in the opposite direction. I think that will help...
maid marta, Collared property of Domina Shelle Rivers and Lady Helena

https://twitter.com/ShellesPuppy
my blog: https://owned-by-princess-shelle.blogspot.com
my art: https://maid-marta.bdsmlr.com
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