Archived: the OG noob question thread! 😀

XTLA · July 18, 2019, 1:11pm

I need single focbox latest ver if anyone have it, don’t want to make a thread just for this , not in hurry tho.

Flasher · July 18, 2019, 3:21pm

That’s a misinformation. I have Trampa superstars and they can fit 6, 7 and 8 inch tires( currently have them on 125mm gummies). They are for larger axles but mine had spacers you put between the axle and bearing to make it fit to 8mm axles

ZachTetra · July 18, 2019, 3:24pm

Is there a difference between Caliber I and Caliber II hangars?

Gonna get some 150mm trucks and the reject BKB mounts

ABSKnut · July 18, 2019, 6:53pm

Are motor pulleys supposed to slide on relatively easy or do they need to be hammered on? I have some Maytech 6374 190kv motors and 18t Dickyho pulleys but they do not go on very easily at all. Also when I put in a motor key they don’t seem to be straight.
What am I doing wrong?

b264 · July 18, 2019, 8:13pm

As long as you don’t connect the batteries in parallel while they are at mismatched voltages, you should be okay

MysticalDork · July 18, 2019, 8:17pm

They should be a slip or light push fit. I’d check the motor shafts and the pulley bores for burrs or high spots, and maybe take a little bit of fine emery cloth and polish both sides, then try again.

kalebludlow · July 18, 2019, 9:13pm

So the BMS does turn off when the switch is connected. I have tried reversing the polarity of the switch but that was the same problem

MysticalDork · July 18, 2019, 9:51pm

Try a different switch? Or check the continuity of your existing switch, make sure it’s actually switching?

whaddys · July 18, 2019, 9:55pm

Hey so I’m switching my gearing from 16/36 to 18/40 and trying to anticipate what belt size change I will need to make. Currently running 275mm with the 16/36, how much larger you think I’ll need to go 18/40??

MysticalDork · July 18, 2019, 9:58pm

Plug all your info in here. https://www.bbman.com/belt-length-calculator/

whaddys · July 18, 2019, 10:17pm

perfect thanks!

Dareno · July 19, 2019, 1:00am

So do I my friend. So do I. One committed bench suicide with no help from me.

glyphiks · July 19, 2019, 1:04am

I’m really confused about what charger I need to get to work with Diebiems… a lot of of posts saying you need a charger that will charge 3v higher than pack, others saying that pack voltage is ok.

Can anyone clarify?

Flasher · July 19, 2019, 1:05am

Noob question slightly unrelated. I have a step down I’m going to plug to my battery to control a bunch of lights. In words, wiring will be:
BATTERY>STEPDOWN>RACING SWITCH>LIGHTS
Is there a way of knowing how much the converter consumes when not in use (switch on the off position)
I know it would be on all the time and I’d add a loopkey in front of it for at home but id like to leave it when I ride and just flick the switch to turn the lights on

Flasher · July 19, 2019, 1:13am

From what I read on his github

Charging mode

When the CHARGE+ input is brought >3V above the PACK+ terminal the BMS is booting into charge mode, the microcontroller will check the cell voltages and if desired enable the switch to allow current to flow from CHARGE+ to PACK+. In this mode the microcontroller knows the presence of the charge. If the charger is removed the microcontroller will keep the BMS on for a configurable amount of time to display a status message (show for example the charged amount) followed by powering down

glyphiks · July 19, 2019, 1:17am

Is it just me or does anyone else have no idea what any of that means…

glyphiks · July 19, 2019, 1:18am

Got a link to the github?

Flasher · July 19, 2019, 1:19am

from what I understand, you need the charge to be 3v higher than battery at time of plugging in to start its charging mode. So as long as you dont try to charge it when it’s only missing 3v you’ll be fine with pack voltage charger

Here’s his github:

github.com

DieBieEngineering/DieBieMS/blob/master/README.md

DieBieMS - Hardware
===
# Introduction
My personal transportation environment is becoming more and more electrical. All my new vehicles so far contain Lithium based batteries and need some form of automated management to be utilized in a safe and easy way. All affordable alternatives that I could find were either to dangerous(extreme cell voltage limits), couldn't carry the desired current (>70A), not compact enough or were not customizable. With this fully opensource project I would like to contribute to a more safe and affordable Lithium based electric vehicle (or possible other usage) future.

![alt text](Binaries/Images/DieBieMSV0_4TOP.png "DieBieMS V0.4 TopView")

![alt text](Binaries/Images/DieBieMSV0_4BOTTOM.png "DieBieMS V0.4 BottomView")

### Other parts of this project
This is the hardware repository containing all hardware source files (designed in altium) and the project outputs to build a BMS PCB. There are three more repositories for this project:<br>
[DieBieMS Firmware](https://github.com/DieBieEngineering/DieBieMS-Firmware) has to be flashed to the empty BMS STM32, the build .bin and hex file can be found in the BMS tool [resource folder](https://github.com/DieBieEngineering/DieBieMS-Tool/tree/master/res/firmwares).<br>
[DieBieMS Bootloader](https://github.com/DieBieEngineering/DieBieMS-Bootloader) can be flashed with the BMS Tool in the firmware tab.<br>
[DieBieMS Configuration tool](https://github.com/DieBieEngineering/DieBieMS-Tool) the tool to configure the BMS and upload the bootloader / update the main firmware.<br>

### Latest hardware release (production files)
Production data for most recent version can be found [here](Project%20Outputs%20for%20DB10005_DieBieMS). The initial project blog/log can be found [here](http://www.electric-skateboard.builders/t/diy-6s-to-12s-bms-with-can/2639). And the schematic in PDF [here](Project%20Outputs%20for%20DB10005_DieBieMS/DB10005_DieBieMS.PDF).

### Features
This BMS is an all in one solution, combined with a lithium battery it is possible to replace an existing lead based battery pack (ideal for upgrading a bulky and heavy electric scooter with a much lighter li-polymer pack). In order to be a plug and play system the BMS carries all power electronics and controller systems to switch the main power path and communicate with external interfaces (displays, buttons or anything else you adapt to it). A small list of features:

This file has been truncated. show original

glyphiks · July 19, 2019, 1:33am

Thanks. Still seems really odd to me that if I’ve got a 42v pack that I can’t charge unless I’m under 39v.

MysticalDork · July 19, 2019, 2:29am

A lot of the brick chargers with aluminum cases have adjustable output voltages. You can get a 42v charger and tweak it up to 45v.