Equals Zero Designs is proud to officially announce two exciting new products for the robotics, mobility, and mechatronics world. We’ve spent many months and iterations trying to perfect these products, and together they can form a robust and powerful backbone for your next project!
First off, our in-house designed dual channel motor controller for medium sized robotic motors,
RageBridge is a two-channel DC motor driver capable of operating at up to 30 real amps continuously from 8 to 50 volts. Designed to replace obsolete single-channel R/C compatible motor controllers in a robotics application, the board will drive two channels of DC motors in forward and reverse with neutral stick braking and without any built-in delays or “double click” reverse lockout features.
Unlike most controllers, RageBridge’s “continuous” rating is a true thermal equilibrium rating, meaning you can actually push 30 amps through it with no additional convective or conductive cooling. So what if your cooling fan failed – you never needed it anyway!
The board features high-efficiency synchronous rectification to minimize switch heating as well as return some of your project’s kinetic energy to the batteries every time you stop, extending battery life. Massive D2PAK-7 low-on-resistance FETs ensure the board can take a serious beating and survive transient loads much higher than its rating.
And unlike most controller that advertise “current limiting”, RageBridge has true you-adjustable output current limits. This doesn’t mean “shut off and don’t turn on again until reset” like everyone else: RageBridge uses a unique hysteresis-based algorithm in conjunction with current sensors on each motor output channel to actually cap the amount of current flowing into your load at a value between 10 and 90 amperes, adjustable via a single potentiometer. The current limit can also be disabled completely if you dare!
RageBridge takes in up to 3 channels of R/C servo style signals: one for each drive channel, and one for an optional directional inversion (“invert switch”) if your robot or vehicle is two-ended, letting you designate which end is “forward”. You also have the option of selecting independent mode or “stick mix” mode, where the two drive input signals are interpreted as throttle and steering, via a simple header.
More information on RageBridge can be found on its product page. RageBridge options start at U.S.$185.
Next, complement to RageBridge, we present a novel drive solution for your medium sized robot or amusement machine:
DeWut? 3 Speed Gearmotor Kit
In years past, power-dense and compact cordless drill motors have been a staple of robotic drivetrains. Yet inevitably, the drill motors themselves could be in several assemblies, have no useful output shaft, and were difficult to mount.
We’ve taken the guts out of DeWalt’s powerful 18 volt hammerdrills, with their all-steel geared 3 speed transmissions, and designed a CNC machined aluminum mount that captures the motor and transmission and mates them to a standard 1/2″ diameter shaft with 1/8″ keyway suspended in two ball bearings. The case has 12 mounting holes distributed on 3 sides for maximum versatility and rigidity in mounting.
The mount allows you to select and retain the drill transmission in any one of its three gears: a low 51:1 speed, a moderate 17:1 speed, and a fast 12:1 speed. Furthermore, the drill’s adjustable clutch feature has been retained on this adapter kit. With only one screw adjustment, you can set the output to slip at virtually no torque, or depress it all the way and fully lock the clutch.
The mount itself is entirely CNC machined 6061 aluminum and the one-piece output shaft that adapts to the drill transmission is made of 1566 alloy steel. The hardware is entirely Grade 8-equivalent ASTM A574 socket cap screws. The gear retainer is laser-machined from black Delrin plastic.
We’ve improved on drill motor mounts of the past by integrating the output shaft and bearings into the mounting face. This means you can actually drive loads and wheels directly from the output shaft, with or without external bearing blocks (We do recommend having outboard bearings for most loads, however!)
DeWut?! is available in three configurations, starting from US $90. Have a look at its product page for more details and assembly instructions!
We hope that with the introduction of RageBridge and DeWut?! that 2013 will be a great year in the hobby and professional robotics and mobility world!