CNC Mill DynaMite 2400

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CNC Mill
Make: DynaMite
Model: DM2400
Serial Number: Unknown
Safety Classification: RED
Link: none


Description

Computer Numerical Control

Milling (machining)

A 3-axis vertical CNC milling machine. A relic of the 1980's, it functions well as a introduction to CNC machining for small components made of plastics and soft metals (ie brass, aluminum).

Safety Rules

  • Risk of entanglement. No long sleeves, dangling clothing/jewelry, long hair, gloves (when equipment is on)  
  • Risk of eye damage. Wear safety glasses.
  • Risk of projectiles.
    • Ensure material and tooling is secure and without obstructions.
    • Ensure tooling is sharp to prevent shattering.
    • Chip guards should be in place when possible.

Restrictions

  • Obtain briefing from zone coordinator before designing CAM projects for this machine.
  • Due to the age of the machine, the speed and power of the servomotors are not capable of achieving the chip loads recommended for modern cutting tools.
    • Soft metal and plastic only.
    • Feed rates and depth of cut should be set slower and shallower than would be set on a modern machine.
  • Use appropriate cutting fluid for the material.
  • For through-cutting operations, waste material or open air shall be beneath the part.
  • Don’t over-tighten bolts and clamps.
  • Due to the limited memory on the machine, it is fed 700 lines of code at a time. Keep your CAM simple.

Notes

Specifications

  • Work Area: x= 6.200" y= 5.000" z= 4.000"
  • Spindle Stroke: 1.5" (38 mm)
  • Quill diameter: 1.4" (36 mm)
  • Spindle Speed: 150-10,000 RPM (Continuously adjustable)
  • Spindle Motor: 1/2 HP Universal AC type

Coordinate System

CAM coordinate system shall be set as follows:

  • X Axis: Left (-), Right (+)
  • Y Axis: Into Machine (+), Away From Machine (-)
  • Z Axis: Up (+), Down (-)

Tooling

  • Collets: ER-16 3/32 through 3/8"
  • The CoG does not provide cutting tools for this machine.
  • Ensure your feed rate and spindle speed are sufficient to achieve the tool manufacturer's recommended chip load.

CAM

Fusion360

  • The post-processor file can be found on the mill's computer. The filename is "dynamyte.cps".
  • KEEP IT SIMPLE! Since the machine is fed 700 lines of code at a time, complex toolpaths will take a long time to execute.
  • Contours and Traces work best. Complex pockets and Adaptive Clearing require significantly more gcode lines. The more advanced
  • Some of Fusion's toolpaths are too complex for the post processor to understand. In these cases, the post will just skip the toolpath and move on to the next. Check your gcode to make sure all toolpaths are present!
  • Avoid "Helix" lead-ins (hundreds of lines of code each). Stick to Ramp or Plunge (fewer lines).
  • Machine only understands gcodes G0 through G99.
  • The machine will typically give errors for negative Z values. Set your Z origin to the bottom of the part. However, small negative Z values seem to be okay, so setting a toolpath depth to go an additional -0.01" to cut through should work okay.
  • All offsets must be programmed into the gcode; the machine does not have the ability to program a zero offset. So, if you are using an 1/8" diameter edge finder, set your model's coordinate system to be 1/16" offset from the actual part.

Feeds and Speeds That Work Well

  • Metals: High spindle speed, low feed rate
  • Aluminum: 2mm or less cutting depth

Documentation

NOTE: These materials are not a substitute for hands-on training with an experienced user.

Operation Instructions

References