Rocket3

Hello, I’m having trouble getting a RC bulldozer steering the way that I’d like, it come with the normal setup of two esc for each 540 motor and a esc for the hydraulic brushless motor, so it operates with both sticks forward for forward or pull both back for reverse, y’all get the idea, I am trying to make it work with the forward and reverse plus left and right on the left stick because as it is now to operate another function I have to let off the stick and it takes power from one track or the other, I’ve got it to work with a sabertooth but the 3s lipo ruins the 540 motors I need something that will mix the two motor channels and control the voltage into the 540 motors any help be much appreciated thanks

ron_van_sommeren

Better ask in a dedicated track (sub)forum. Don't forget to post your equipment/radio/controllers/make/type/gearing/ratings/voltage/current/...

E.g.
www.rcuniverse.com/forum/rc-tanks-369
www.rctankwarfare.co.uk
RC Tanks - RC Groups

Rocket3

I have never ever belonged to something like this before, so please forgive me, could you point me in the right direction because this situation is driving me crazy!!!!!
thanks!

ron_van_sommeren

You won't find much track knowledge/experience in this electric flight subforum. Not to mention that RC Universe has gone a bit quiet over the years.
Try the three (sub)fora I referred you to in my previous message.

Also several bulldozer, tank and track subfora in this forum
www.rctruckandconstruction.com
Semi Trucks and Construction Equipment - RCG

Forumtip
Don't forget to set/select e-mail notification when starting a new thread, all fora have that handy option.
You can even set it as default subscription mode in your forumprofile:
User CP (left in horizontal ribbon, on every page)
→ Edit Options
→ Messaging & Notification

Clicking on User CP will also show you your subscriptions that have new replies in them. I always start/enter fora via that link.

Vriendelijke groeten Ron
• Without a watt-meter you are in the dark ... until something starts to glow •
• e-flight calculators • watt-meters • diy motor tips&tricks • Cumulus MFC •

ron_van_sommeren

Note that Kv says very little about max.power or max. current a motor can handle, or about max. torque, or propsize. A 1:1 train motor and the motor in your toothbrush or in a bedroom appliance can have the same Kv of 2200rpm/volt.

Kv is the velocity constant, a physical property like mass, speed and length, expressed in the unit rpm/volt.

Kv is not a rating, not a figure of merit (explanation).
A Kv=1000rpm/volt motor on 10volt and a Kv=20000rpm/volt on 5volt will give same (no_load)speed of 10,000rpm, provided the motors can handle the current and power.

It's all about what the motor wants to do versus what the motor can do.
Kv matches desired rpm and battery voltage, there's nothing more to it.

1. Want
   Kv and voltage determine how fast motor wants/tries to run
   (rpm_noload = voltage × Kv, or, in other words, Kv = rpm_noload / voltage.)
2. Current
   RPM and prop determine torque, which in turn determines current
   (current = torque × Kv, in SI units!, or proportional to Kv³ ).
3. Can
   Max.current and max.power determine whether that battery/motor/rpm/prop combo can run without going up in smoke.

An engine tries to keep a constant torque: as load goes up, rpm goes down.
An e-motor tries to keep a constant rpm, no matter the load: as load goes up, torque must go up, and therefore current goes up.

Vriendelijke groeten Ron
• Without a watt-meter you are in the dark ... until something starts to glow •
• e-flight calculators • watt-meters • diy motor tips&tricks • Cumulus MFC •