TZ85 'programming'

Hi guys,

I'm in the 'testing' phase at the moment with my feather. So far I have a sheet of plywood with some drill motors mounted to it, some wheels, 2x hacked TZ85s, a LemonRX and a 12v lifepo. Transmitter is a DX6i.

So far, so ordinary. I've mixed the channels on the DX6i so that with one stick the 'robot' goes forward, back, left and right as it should.

Problem is - at low throttle, one motor moves slower than the other. I wondered if the ESC isn't reading the full range of the stick input, so I looked up how to get into the programming mode or initial setup of the ESC.

Can I get into programming mode? Can I buggery! I should add at this point that the TZ85s came 'pre-hacked' by a member of this parish, and I'm reading the instruction manual from when they were brushless controllers, so I don't even know if the method of getting into programming mode is correct.

Can anyone point me in the right direction? Thanks :)

The manual your reading is for a different set of code. That's kinda of an odd behaviour though. Have you checked the travel adjust is all 100%, the sub trims 0 and the mixs are all 100%'s?

It sounds more like a trimming issue to me which means you just need to fiddle trims till it all matches up.

I did check the travel adjust and mixes - they're all 100% as you'd expect. Didn't look at sub-trim though so I will check that.

Is there a way to 'program' the hacked TZ85s then? For example changing from Lipo cell detect to Lifepo, cut-off voltage, brake, that sort of thing?

You generally don't need to worry about those with a TZ85. They are so overspecced that they are just setup to be quite aggressive boards (meaning they'll follow the sticks quite closely).

With the "original BotBitz" TZ85's , you can use the BotBitz programming box to set all those things.

I don't know if the "open source" reprogrammed ones can do that too.

Thanks guys,

The sub-trims were on 0, but adjusting these a little has now brought the motors into "sync", and the robot now moves in a straight line when I ask it, so progress there :D