makana 0,1 mm putaran Ditanyakan berapa waktu pemotongan sesungguhnya. ? (5% ) Dari soal nomor 8 jika waktu non produktif 250% hitunglah waktu pemesinan total! 0.(5% ) Sebutkanlah 4 jenis waktu pemesinan vang termasuk waktu non -produktif?

The provided text appears to be Indonesian and describes a machining problem. Let's break down the questions and attempt to answer them, assuming some context that isn't explicitly given.**Understanding the Problem:**The problem involves a machining operation where "makana" (likely referring to a material being cut) is being processed with a feed rate of 0.1 mm per revolution. We need to determine the actual cutting time, considering non-productive time.**Question 1: Actual Cutting Time**We lack crucial information to calculate the actual cutting time. We need to know:* **Total length to be cut:** The total length of the "makana" that needs to be machined.* **Spindle speed (RPM):** The number of revolutions per minute the cutting tool makes.With this information, we can calculate the cutting time as follows:1. **Cutting speed (mm/min):** Feed rate (mm/rev) * Spindle speed (rev/min)2. **Cutting time (min):** Total length to be cut (mm) / Cutting speed (mm/min)**Example:**Let's assume the total length to be cut is 100 mm and the spindle speed is 1000 RPM.1. Cutting speed = 0.1 mm/rev * 1000 rev/min = 100 mm/min2. Cutting time = 100 mm / 100 mm/min = 1 minute**Question 2: Non-Productive Time**The problem states that non-productive time is 250% of the total machining time. This means that for every minute of productive (cutting) time, there are 2.5 minutes of non-productive time.To find the total time, we add the productive and non-productive times:Total time = Productive time + Non-productive time = Productive time + 2.5 * Productive time = 3.5 * Productive time**Example (continuing from above):**If the productive (cutting) time is 1 minute, the total time would be 3.5 minutes.**Question 3: Types of Non-Productive Time**Four examples of non-productive time in machining are:1. **Machine Setup Time:** The time required to prepare the machine for the operation (e.g., mounting the workpiece, adjusting tools).2. **Tool Changing Time:** The time spent changing cutting tools during the operation.3. **Idle Time:** Time when the machine is not actively cutting due to delays or interruptions.4. **Inspection Time:** Time spent checking the workpiece for quality and dimensions.**In conclusion:** To accurately answer question 1, we need the missing data (total length to be cut and spindle speed). Question 2 shows how to calculate total time given productive time and the percentage of non-productive time. Question 3 provides examples of non-productive time categories.