MMotorTank — EV3-G Custom Block

A custom block for LEGO MINDSTORMS EV3 Education software (EV3-G) that controls two M Motors simultaneously for tank drive. The standard EV3-G software has no block for driving two M Motors as a tank, so this fills that gap.

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Download

Get the latest MMotorTank.ev3b from the Releases page.

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Installation

1. Download MMotorTank.ev3b from the Releases page.
2. Open EV3-G.
3. Go to Tools → Import Block.
4. Select MMotorTank.ev3b and import.
5. The M Motor Tank block appears in the Action palette.

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Features

Item	Details
Target Software	LEGO MINDSTORMS EV3 Education (EV3-G) v1.4.5+
Modes	Off / On / Seconds / Degrees / Rotations
Port Selection	Two-port UI in the top-right corner (default: A+D)
Power Left/Right	Independent, -100 to 100
Invert Right	Compensates for physically reversed right motor mounting
Reverse Both	Reverses both motors for backward driving
Languages	15 languages

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Parameters

#	Parameter	Description
1	Ports	Select the two M Motor ports (e.g. A+D). Shown in the top-right corner of the block.
2	Power Left	Left motor power, -100 to 100. Negative = reverse direction.
3	Power Right	Right motor power, -100 to 100. Negative = reverse direction.
4	Invert Right	Enable if the right M Motor is physically mounted in reverse (default: on).
5	Reverse Both	Reverses both motors simultaneously. Use for driving backward.
6	Brake at End	Applies brake after movement ends. Off = coast to stop.

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Modes

Mode	Description
Off	Stops both motors.
On	Runs both motors continuously at the specified power.
Seconds	Runs for a specified number of seconds, then stops.
Degrees	Runs for a specified number of degrees (360° = 1 rotation), then stops.
Rotations	Runs for a specified number of rotations, then stops.

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Inversion Logic

XOR = Invert Right XOR Reverse Both

actual_left  = Power Left  × (1 − 2 × Reverse Both)
actual_right = Power Right × (1 − 2 × XOR)

• Invert Right = on, Reverse Both = off → Right motor runs in reverse (standard tank wiring compensation)
• Invert Right = off, Reverse Both = on → Both motors reversed (backward)
• Invert Right = on, Reverse Both = on → Only left motor reversed (left turns backward)

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Documentation by Language

Language	Link
🇺🇸 English (US)	docs/en-US.md
🇬🇧 English (GB)	docs/en-GB.md
🇯🇵 Japanese (日本語)	docs/ja.md
🇩🇪 German (Deutsch)	docs/de.md
🇫🇷 French (Français)	docs/fr.md
🇪🇸 Spanish (Español)	docs/es.md
🇮🇹 Italian (Italiano)	docs/it.md
🇳🇱 Dutch (Nederlands)	docs/nl.md
🇵🇹 Portuguese (Português)	docs/pt.md
🇷🇺 Russian (Русский)	docs/ru.md
🇰🇷 Korean (한국어)	docs/ko.md
🇨🇳 Simplified Chinese (简体中文)	docs/zh-Hans.md
🇩🇰 Danish (Dansk)	docs/da.md
🇳🇴 Norwegian (Norsk)	docs/nb-NO.md
🇸🇪 Swedish (Svenska)	docs/sv.md

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Requirements

• LEGO MINDSTORMS EV3 Education software (EV3-G) v1.4.5 or later
• Windows (EV3-G is Windows/Mac only)

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License

MIT License