Cutting Condition Setting; Manual Setting Of Cutting Conditions - Roland CAMM-3 PNC-300 User Manual

9. Cutting Condition Setting

Before you begin the actual cutting process, the cutting conditions such as the revolution speed of the spindle motor and the feeding
speed of each axis must be designated according to the quality of the workpiece and the type of tool used. There are several deciding
factors to be taken into account when designating the cutting conditions.
1. The quality of the workpiece
2. The type of tool used
3. The diameter of the tool used
Designate the cutting conditions in consideration of the above factors by performing the following three PNC-300 setting operations.
1. The spindle motor revolution speed (tool revolution speed)
2. The feeding speed (tool moving speed)
3. The cutting-in amount (depth of one cutting operation)
Note : When settings have been made with both the software and the PNC-300, the last settings made have priority.
In this manual, these three conditions are called the cutting conditions. The characteristics and points to consider for each of these
conditions are as follows.
Item
Spindle motor
revolution speed
Feeding speed
Cutting-in amount

Manual Setting of Cutting Conditions

The cutting conditions can be set manually according to the method described below.
If the cutting conditions can be set with your current software, this is a faster and more efficient method than manual setting. It makes
no difference when you come to construct a program. The following method is appropriate for making delicate halfway adjustments to
conditions previously set using software, etc.
Feeding Speed
1
Press the [MENU] key to make the following screen
appear on the display.
The bigger this number, the faster the cutting speed. However, if this number is too large, the work surface
may melt or burn due to excessive friction. Conversely, if this number is made smaller, the time taken for
cutting becomes too longer. Generally speaking, the entire cutting speed is determined by the cutting edge
speed, so the smaller the tool diameter, the higher the spindle revolution speed required. (When performing
engraving without rotating the cutting tool, set "REVOLUTION" to "OFF.")
When the feeding speed is high, processing becomes rough and flash marks tend to remain on the cut surface.
On the other hand, when the feeding speed is slow, processing takes more time. Be careful because a slower
feeding speed does not always result in improved finishing.
When the cutting-in amount is deeper, the cutting speed increases, but the cutting-in amount is limited by the
quality of the workpiece. In cases where the required depth can not be cut at once, repeat cutting several
times to depth that does not breach the limit.
4. The cutting method
5. The cutting shape
Characteristics/Points to Consider
Revolution speed : 3000—8000 rpm
2
Press the [ ] or [ ] key to move the blinking cursor
(" ") to "XY-SPEED."
To set the lowering speed of the head, move the
blinking cursor (" ") to "Z-SPEED."
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