What do you imagine "crank" means that differs from having some heterodox views? That is the definition of this use. "a person who has strange or unusual idea

What do you imagine "crank" means that differs from having some heterodox views? That is the definition of this use. "a person who has strange or unusual ideas and beliefs" https://dictionary.cambridge.org/us/dictionary/english/crank https://dictionary.cambridge.org/us/dictionary/english/crank