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/min
2. 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.