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## MASSO Documentation

### Example program for making an Arc

```N10 G00 X20 Y10 Z-1
N20 G03 X50 Y40 I0 J30```
• In the above example in the first line moves to position X20 Y10 Z-1
• An arc is made starting at position X20 Y10 and ending at coordinate X50 Y40 with centre at position X20 Y40 moving in a counter clockwise direction. The Z height does not change.
• The Arc centre is calculated as follows
• Starting position X20 + I0 = Center X coordinate X20
• Starting position Y10 + J30 = Center Y coordinate Y40 ### Example program for making an Spiral

```N10 G00 X20 Y10 Z0
N20 G03 X50 Y40 Z-0.5 I0 J30```
• In the above example in the first line moves to position X20 Y10 Z0
• An arc is made starting at position X20 Y10 and ending at coordinate X50 Y40 with centre at position X20 Y40 moving in a counter clockwise direction. The arc is the same as in the diagram above but the Z axis will decend from its current height to -0.5 units at a uniform rate over the arc to form a spiral path.
• The Arc centre is calculated as follows
• Starting position X20 + I0 = Center X coordinate X20
• Starting position Y10 + J30 = Center Y coordinate Y40

##### Note: Units are defined as either inches or mm depending on your machines setup or G20 or G21 command in use.
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Last updated on October 11, 2019
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