-(으)ㄹ 양으로

-(으)ㄹ 양으로 explains the purpose or resolve behind an action: 'intending to do ~, with the aim of ~'.

목적·의도Purpose, plans & wishes

Han: The intention points to a future action, so the verb takes only -(으)ㄹ; the past tense belongs in the main clause (쌌다).

Examples

밤을 새울 양으로 커피를 한 잔 더 마셨다.I drank another cup of coffee, intending to stay up all night.

그는 끝까지 버틸 양으로 도시락을 두 개나 싸 왔다.Intending to hold out to the end, he packed as many as two lunchboxes.

아이는 엄마를 놀래 줄 양으로 문 뒤에 숨어 있었다.The child was hiding behind the door, meaning to surprise his mom.

그녀는 다시는 그를 만나지 않을 양으로 전화번호까지 지워 버렸다.Determined never to see him again, she even deleted his phone number.

V+(으)ㄹ 양으로

떠나다 → 떠날 양으로, 먹다 → 먹을 양으로

Attach it to verbs only, and do not put a past marker before it: say 떠날 양으로, not 떠났을 양으로. Tense is shown in the main clause.
The person who intends and the person who acts in the main clause are usually the same.
It sounds written or narrative; it is used mainly in statements describing someone's motive and is unnatural in commands or suggestions.

Wrong: ~~내일 일찍 떠났을 양으로 짐을 미리 쌌다.~~

Right: 내일 일찍 떠날 양으로 짐을 미리 쌌다.

The intention points to a future action, so the verb takes only -(으)ㄹ; the past tense belongs in the main clause (쌌다).

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