Here is my first topic and I am presenting my Winch for Foiling, Wakeskate and Skiing.
Material:
UNU Hubmotor 3kW with removed rim bed
Controller VESC from a guy from Germany
Side parts and spacers made of aluminum
Flanks for the Spoil room made of 4mm stainless steel
Rope Dyneema 2mm - about 200m length
Actually Maytech V3
The advantage of a Hubmotor is that I actually already have the Spoil room and don’t need any other mechanics to operate it. With the controller I can bring the motor to 11kW peak at short notice.
The engine delivers more than enough torque, which is needed for starting, and is available used cheaply.
In addition, there is enough power to build a small “skiing lift” for the children
Located in lower Austria…
I have a second winch too.
The idea is to use two winches, each pulling in one direction, to get endless pulling on the water.
Would be easy to setup. One winch pulls, the other one brakes. Then switching direction…
Where are you located?
Hey @MRUEM love seeing that I’m not the only one building a custom wake/snow winch! How’s the progress?
Mine is ~1.5 years in the making, and finally being tested on water in Latvia this summer.
MXUS 3K V3 Turbo (16:4) motor
Kelly KLS7212S - replacing this with Spintend ubox alu lite 100V/100A soon for UART speed control & better overall config options
20s4p custom battery pack with Samsung 21700 40T cells & BMS
I see we’ve taken a very similar approach for the spool design
3mm dyneema, ~150m currently
Extruded aluminum frame (20x20) + water cut aluminum sides + stainless steel torque plates
ESP32<-ESP NOW->ESP32 remote throttle (currently in some PVC piping for water tightness)
Max load observed on the battery has been ~56A so far for top of the water start. Haven’t tried deep water start yet.
Hi @emalihins Thank you for your post.
Nice looking build you have. Do you have pictrures from the inside?
My winch works great, but I’m having a problem where, during sudden load changes (e.g., if the rider falls), the rope springs toward the winch like a spring, causing it to overturn on the rope pulley.
This usually happens with beginners who still have little control.
Perhaps there needs to be an eyelet about 1 meter in front of the rope inlet to catch the rope? How did you create the rope inlet and the internal spool?
I can still only attach one image, will post the other one separately.
I too have an unsolved problem of the rope leaving the spool sometimes. I think this mostly happens during transportation, when the rope is let out too much and has the possibility to jump off the spool. During riding I almost don’t see this any more, and have been attributing it to three factors:
Dyneema rope is static, so it doesn’t really have any stretch/springiness
Edges of the aluminum spool sides are only a few millimeters away from the top/bottom covers of the winch, preventing the majority of the rope falls
The motor doesn’t stop instantly, so after the throttle is released there’s some residual rotational movent left in it, which helps the rope to slow down in a more controlled manner
When this happens, however, it’s hell. Looking at some commercial winch designs, I think they enclose the spool completely, leaving no room for the rope to leave the spool. Not sure how to achieve this yet though.
I also have a 2mm Dyneema rope. I meant that if a rider falls under load, or accelerates too hard and then releases the trigger, there is a sharp change in load that can cause the rope to slip over the spool. This mostly happens to beginners who have no familiarity with winches or remote controls. It doesn’t usually happen to me, but I understand how it works, whereas a layperson wouldn’t.
Your winch looks great, thanks for the photos. I was already wondering whether it needs a rope pusher inside. That would be easy to implement. It would slow down any load changes. Completely enclosing the spool internally would also be possible, but it would be very complex.
I’ll first try a ring eyelet about 1m in front of the rope inlet. That seems to be the simplest option at the moment.
Really curious what rope system you end up trying and how it performs.
In the meantime I’ve received an inductive proximity switch, going to try to fit it behind the fairlead to detect end of rope. This is before my VESC arrived and I can detect load/revolutions programmatically.
How’s the progress?
