I will copy pasta now what I had posted in the .builders forum so far. Some pictures with commentary.
So to conclude, the XESC 6.6 has an issue/flaw by design. It isn’t capable to delive more than ~45A, which is pretty devastating considering size, wheight and cost. <-So a no go.
The XESC 6.6 is removed from the shop now, EBMakers dealt quick and appropriately with this problem in my opinion.
I purchased the “Super mini Makerx ESC” from them and got it on the last week. I didn’t tested it yet because I’m a bit bussy lately. And I also had difficulties to get a test setup with telementry (metr pro) running because I missed/forgot that they use different (smaller) connectors (I think/hope that these are JST-ZH 1.5mm connectors we will see when mine arrive).
Anyway I made some pictures for a quick closer look (maybe an review when I got everything running) on the -in my opinion- more interesting “MakerX mini FOC” .
A nice touch, (I guess) they use some kind of routing packaging service for shipping to Germany, this way the package slipped through customs. I didn’t had to paid tax or VAT for this one:wink: just the 135$ with quite fast (6 days) free shipping.
The ESC came well packaged in the small box whith proper antistatic foam+shelding bag. As silverline said about the 6.6 single the casing is an all aluminum nicely sandblasted and anodised (I love that kind of finish). It is also well labeled (It strongly remids of stewii’s ESCape labling which, just so good tp read and such a clean look)
It came with these accessories: 3 matching bullets for the motor wiring, a female XT60 for BAT to match the presoldered ESC, connectors with 5 cm of cable for PPM(3 pin) and hall(6 pin) [? at leastI guess that] and also the usual cheap micro usb to usb-A.
And now just as a comparison and to get a feel for the tiny size (I don’t had a banana for scale and forgot to make a picture with something well known like a 18650) a Flipsky FSESC 6.6 (the one with housing and pushbutton Antispark) Anyway the “mini FOC is really cute” . I didn’t made a picture but I also weight the mini FOC with plugs, cable and it’s heatsink housing the mini FOC weighs just 86 g and is really small .
Now the internals, they don’t look bad even the small resistors are well soldered (even though some joints would be a bit happier with a tiny bit more flux, but we all know there is never enough flux). The curcuit board is well cleaned but not conformal coated (something I will add once it proves to meet my expectations in testing) *please curse me for making a picture in horizontal mode and sorry for the distortion
The heatsink/casing was thermal padded on both sides on expected heat sources, the compression overall OK but I think they should try to accommodate thinner thermal pads for better conductivity (thermal pads are not really well conductors after all)
Now a quick glance on the connectors, they are marked on the board when possible (it is on the casing anyway) but mostly not because it’s so tight on the board. As I said these are not the usuall JST-PH 2.0 mm but instead something smaller, I think and hope it’s a JST-ZH connector type 1.5 mm but it could also be a GH (1.25 mm) or SH (1.0 mm) I’m not really sure the time will tell (when my connectors arrive).
I have to admit that this ESC isn’t planed to be used on an esk8 but on a reasonable sized ebike hub motor instead. It is reserved for my nicely looking NSU, just as a sweet everyday commuter. To get caught with an ilegal DIY ebike is way less likely than with an esk8 after all in germany (I will keep and ride my boards, calm down, just commuting will be with this one)
**EDIT 31th of May 2019 : **
So far I can tell that the MINI FOC works as expected. I did the normal setup procedure with a PSU just fine and played a bit with one of my batteies. I used it only with my hub motor so far. And now I’m waiting for some PicoBlade equiped cables.
In the meantime @YUTW123 from EBMakers informed me that the MINI FOC that I (and a few others) have are a little bit flawed. One trace is a bit undersized and in their lab testing setups that draw more than 50A for more than a few seconds tend to burn (50A is only possible with improved/forced cooling for more than spikes anyway but @YUTW123 is right, 20-35A is plenty for moderate non “insane” builds)
They adviced me(us) to reinforce the curent capabilities on that trace like in this picture, I think the now shipping MINI FOCs will be delivered reinforced and maybe they will improve the design in the near future. I put some solder on top of that trace all along that trace (top and bottom of the pcb) so you know.
These kind of beta testings and problems are a bit annoying and maybe EBMaker should had tested and figured all that before shipping but they informed me and others quite fast and honest. It’s no big deal for myself 50A is basicly out of spec anyway.
BTW I only use 10S batteries on my projects if possible, usually without a BMS and charge always with a balance charger to 41V for my few projects. I have a icharger 4010 DUO and a icharger 3010b+ with strong DIY Server PSUs (which like to mess with cheap USB cables nearby which is why I usually don’t use my big 24,5V 2,4kW DIY server psu for any setups)