# MCU and control-loop requirements for accelerating a 60 mm shutter disc to 720 RPM and stopping it within 20 ms
**URL:** https://community.simplefoc.com/t/mcu-and-control-loop-requirements-for-accelerating-a-60-mm-shutter-disc-to-720-rpm-and-stopping-it-within-20-ms/8229
**Category:** Uncategorized
**Created:** [June 18, 2026, 10:09am UTC](https://community.simplefoc.com/t/mcu-and-control-loop-requirements-for-accelerating-a-60-mm-shutter-disc-to-720-rpm-and-stopping-it-within-20-ms/8229 "2026-06-18T10:09:37Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@a305092445](https://community.simplefoc.com/u/a305092445)
#### Post date: [June 18, 2026, 10:09am UTC](https://community.simplefoc.com/t/mcu-and-control-loop-requirements-for-accelerating-a-60-mm-shutter-disc-to-720-rpm-and-stopping-it-within-20-ms/8229/1 "2026-06-18T10:09:37Z")
Hi everyone,
I am developing a rotating shutter using a 2804 motor with a magnetic encoder. The motor has a rated torque of approximately **0.03 N·m**.
The load is a **6061 aluminum disc** with the following approximate specifications:
- Diameter: 60 mm
- Mass: 10–15 g
- Target speed: 720 RPM
My motion requirements are:
1. Accelerate the disc from rest to 720 RPM within 0.3 seconds.
2. Maintain a stable speed of 720 RPM.
3. After receiving a stop command, decelerate and stop at a specified angular position within 20 ms.
I would like some advice regarding the controller and control architecture:
- Is an MCU such as the STM32G431 necessary for this level of performance, or would an ESP32 or Arduino-class MCU be sufficient?
- Could a SimpleFOC Mini combined with an ESP32 or Arduino meet these requirements?
- Would I need to design a custom PCB with proper current sensing and implement cascaded current, velocity, and position control loops?
I would appreciate any suggestions regarding suitable hardware, control modes, and expected loop frequencies.
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### Author:  [@o\_lampe](https://community.simplefoc.com/u/o_lampe)
#### Post date: [June 18, 2026, 4:38pm UTC](https://community.simplefoc.com/t/mcu-and-control-loop-requirements-for-accelerating-a-60-mm-shutter-disc-to-720-rpm-and-stopping-it-within-20-ms/8229/2 "2026-06-18T16:38:27Z")
Not every ESP32 comes with FPU. That’s important to know.
In general I don’t see a problem, stopping at a certain angle within 20ms is the toughest part.
The simpleFOC mini is a good match for the 2804. Attaching the diametral magnet can be tricky because of the hollow shaft.