A machine that take paper money - called “bills”- and returns the same amount to you in coins is called a change machine or bill changer.
These machines are usually found in places where paper money (bills) are not accepted. Such as laundromats and parking lots that have metered machines. Another place one might see them is at an arcade where coins are used to play arcade games.
In a sentence- “you must use the change machine to change your bills into coins as the parking meters only accept coin currency”
紙幣（bill）を硬貨に替える機械は「change machine」または「bill changer」と言います。
こうした機械は紙幣が使えない場所でよく見かけます。例えばコインランドリー、パーキングメーターのある駐車場、ゲームセンター。
例文
“You must use the change machine to change your bills into coins as the parking meters only accept coin currency”
〔訳〕紙幣を硬貨に両替するために、両替機を使わないといけない。パーキングメーターには硬貨しか使えないから。
A machine usually used to change bills to coins can be called "change machine" or a "bills change". For example, you can use these in sentences in the following ways:
-I am looking for a change machine. I want coins for this $10 bill
-Do you have a bill changer here?
普通お札を硬貨に替えるのに使われる機械のことは、"change machine"か"bills change"(両替機)と言えます。
以下、例文です。
-I am looking for a change machine. I want coins for this $10 bill. (両替機を探しています。この10ドル札を硬貨に替えたいです)
-Do you have a bill changer here? (ここに両替機はありますか?)
By using the term 'Coin change machine' this explains exactly what it is but you could also say change machine people would know what you mean
This machine is also called a money changer or could be called a 'note to coin changer'
”Coin change machine"と言えば、それが両替をするための機械であることを一言で説明できます。
両替機のことを”Money Changer"または”Note to Coin Changer"とも言います。
Well, a machine which changes notes to coins would be precisely called, 'a note to coin dispenser.' If a machine changes coins to notes, then it would be called, 'a coin to note dispenser.' Any other description would be open to misinterpretation.
紙幣を硬貨に替える機械を正確に表すと「a note to coin dispenser」になると思います。硬貨を紙幣に替える機械なら「a coin to note dispenser」になるでしょう。
これ以外の言い方だと誤解される可能性があると思います。
As the world progresses, we are slowly becoming a cashless society. Many of us never pay with cash, using only our debit and credit cards. Despite this, we still need cash sometimes—especially small change. Places like laundromats that have coin-operated machines frequently have "coin machines". You insert a "bank note" or "paper money" into the machine, and the equivalent amount of money is dispensed as "coins" or "small change".
The act of changing one thing for another thing is called an "exchange", for example, you can exchange currency from Yen to Dollars; you can exchange services rendered for accommodation, etc.
A money exchange machine would receive your bills and spit out coins.
Coins are commonly referred to as "small change"because you typically don't carry enough coins to equal a large amount of money! Furthermore, coins are smaller than bills. Therefore, a small-change machine would be full of coins.
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