Great Design! Nice and simple.
That does look great! Thanks for the pics. I am just starting this journey of a DIY foil assist and will be using it on axis masts so this is of real interest. Do you have a link to your other files for the mast clamp mount that you don’t mind sharing? The link provided works but just shows part of it (unless I’m doing something wrong).
Many thanks.
Update: my mistake. I have just downloaded the app and can see them. That is brilliant. Thanks.
1 Like
Hello Everyone,
I have a local battery making company that have said the could make up the below for this project. I am not confident with the battery making side, hence getting a company involved to do it properly. Would you mind looking at the below spec they have sent me and let me know if it will do the job with the 6374 or 6384 motor?
Many thanks,
James
6S3P Molicell P42A 21700 battery pack.
22.2V 12Ah BMS,Balancing Protection Circuit 50A Continuous 80A peak
Dims 130mm x 65mm x 75mm
weight 1.5kg
Output Lead to XT90 Discharge Connector
Output Lead to XT60 Recharge Connector
The pack is finished in a double shrink wrap coating
I think the battery specs should be OK for a foil assistant, Molicel P42A are good batteries that deliver high A. I can get on the foil on my efoil with 50A battery current.
1 Like
But his batt is only 6s and only 3p, so battery sag will be important. Is 20v*80V=1600w enough yo get you on the foil?
1 Like
Yes you are right, could be on the lower end, maybe better go with 8S or higher current (4P).
1 Like
Thanks for both of your replies. Pablo_foil - what would you recommend for a foil assist? I went for 6s3p after reading the posts in this thread and this seems to be commonly mentioned. Nothing is built yet though so keen to hear all views.
Yes. That is correct. If i recall correctly thats the config of the commercial foildrive and also other builds here. The p42 can deliver 45A, so its just a matter of using higher currenr bms or just use it for charging (you can still add a fuse for discharge).
Having said that, i also paid a local guy to build the pack for me. Fuse for discharge and bms to charge. But honestly i only have the bms because he insisted a lot on it. If i had to do it again id remove it completely and use an external balance charger, as many have done here. This way you know exactly what is goong on in each cell, you can set the exact voltage/storage, etc
3 Likes
Man this is awesome! SMART! Would love to try this clamp out on my Axis mast! I cant seem to download the file from the Fusion link you posted. I think file sharing through those links requires a premium membership. Could you share the fusion file some other way? Im running a flipsky motor so would probably need to modify the bolt hole pattern.
This mount is awesome. Nice work!
Thanks also for sharing the fusion link but the link shared doesn’t allow download. Is there any way you could change the settings for us to try it out?
Thanks for the extra info on this pablo_foil. I think I will go for 6s4p.
Ok, i have the same and works fine. Total weight =3.75kg, so not the lightest out there.
Just one comment.
What is your intended use? As a foildrive its a bit overkill since you get more than 10min ride time and 3p have proven enough in many builds. But if you want to play a bit with it then it should be ok. But then you could consider using 8s, as was suggested here and in the assistplus
Hi pablo_foil,
My plan was to build an assist plus version. I’m 90kg and would be on a SUP foil board. Maybe the 8S3P will be the one I need then. I don’t need to foil in flat water. I just want to catch loads of waves. I just want to make sure I have enough power for plenty of waves. So then, in your opinion, 6S3P 21700 or 8S3P 21700?
Thanks,
James
If you are not constrained by weight or esc, I’d go for 8s3p. Just make sure your batteries can deliver high amps, like the p42…
6s is kind of the bare minimum and for your weight you’d probably have to paddle to get started.
2 Likes
My old box was leaking so I purchased a new one. Same as FD but without the clear lid. Have had great success with a cooling fan on the esc
efoiling for short time frames and using it as an assist.
5 Likes
In my previous setup, I was successfully running a 150A Marine ESC. It worked very well and I got immediately full power and was able to ride.
I’ve now moved to Maker X GO FOC SV6 - FW 5.2. Still on 6S.
Went through normal setup in FOC and I tried it yesterday on the water… I couldn’t even lift the foil. I believe my VESC conf requires more tuning. I was about to switch to BLDC but still wondering if I can’t get it working perfectly on FOC.
I had Motor Current Max setup to 54A (this is done via detection) and I’m now moving it to 90A. Same for Current Max Brake (which I don’t care that much)
I’m using Graphene 6S1P & Motor is N6374 130kv - Current Control
I’ve also installed the no hw limit firmware for VESC
Did I miss something ? @Manufoil @Alexandre any thoughts?
It looks great the way it is all put together. I am a complete beginner and only just started gathering my bits for my first build. I’m surprised a fan in a sealed box works so well but it sounds like a route I should consider. How does the heat dissipate when it is all sealed?
1 Like
I have the same MakerX VESC. It worked fine for one time testing but then just died. No idea what is wrong, no 5vdc output from BEC and it doesn’t run the motor. Does not smell burnt. Their customer service is terrible…I don’t recommend buying their products. I have since received a Flipsky VESC. I cannot remember the name of it but it’s similar in size and specs to the Maker X. So far, it works well during testing. It is very nice to have data displayed on the Maytech remote. I will test in the surf soon and I also have a R/C type ESC to try afterwards.
did you manage to connect to VESCTOOL and flash the firmware?
did you run the flipsky VESC on the water so far?
I did connect and program the Flipsky VESC, and yes, update firmware. I have tested it only in a pool, not on the ocean yet.
1 Like