Hi all,
I’m building a small system to reel in and release about 25 cm of cable using a 10 mm diameter drum. The cable may experience up to 20 kg of pulling force, so I need something strong, reliable, and compact.
I’m currently using two MG996R continuous rotation servos with an Arduino to share the load (each rated at ~10 kg·cm torque), but I’m having a hard time keeping them synchronized. Even after a lot of tuning, they drift apart and make precise control nearly impossible.
I’m now looking to replace them with a single motor setup that meets the following:
- Continuous rotation in both directions
- Stall torque ≥ 20 kg·cm** (to handle 20 kg pull on a 10 mm drum, with margin)
- Minimum speed of 60 RPM at the output shaft
- Built-in encoder (or equivalent feedback) for tracking exact rotation
- Runs on 6 V (battery-powered)
- Motor driver that handles at least 5 A peak current
- Compact and robust—this will eventually be used in an outdoor, real-world environment
I’d really appreciate any advice on:
- A suitable motor that meets these requirements
- A compatible motor driver
- Any tips for power supply and general setup
Thanks in advance—just want to make sure I head in the right direction before buying more parts!