CNC-Fräse: Unterschied zwischen den Versionen

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The current machine's state is given by a coordinate triple, and some states (emergency swich, spindle speed, ...). The machine '''coordinate system''' is defined by the now automated homing routine. Thereafter, one can move the machine to a location, and "touch off", giving explicit coordinates for this location. Thereby the working coordinate system is defined. This is also the system displayed in Axis, However, in the background, the machine still works in the home-coordinate system for checking its movement limits. Clever!

== Nomenclature ==

Or the what is which device:

* CNC PC: a Linux machine running the LinuxCNC Software and sends out commands via Parallel Port

* G4: a old Apple G4 Case holding the stepper drivers

* Stepper Driver: Each stepper driver controls one stepper. There are 5 Stepper Driver in the G4: 2x X, 1x Y, 1x Z, 1x A (currently unused)

* Breakout Board: Is used to "convert" the parallel commands to a different protocol that the stepper drivers are using. Also has a VFD Port to control the Frequenconverter

* FU/Frequenzumrichter/Frequencyconverter: This Box controls the Spindle. It has a output of 100 to 400Hz on 3 Phases and gets controlled by the Breakout Board.

== Standard Procedure ==

There are some important steps to take, otherwise you can destroy everything - even the earth...

If you don't switch on the things in this particular order it can happen that the machine does things out of nowhere e.g. moves or turns on the spindle!!!

* Start CNC PC (dont turn on the G4 (The "G4 Case" stepper control thing), neither the FU)

* Start LinuxCNC

* Check if the "Notaus" is physically triggered on the machine (Button is pressed)

* Now power on the G4

* Now plug in the FU ("Frequenzumformer")

** Wait until the FU is booted

** Check if 100.0 Hz is set on the screen of the FU

*** Otherwise rotate the rotary encoder that it is 100.0Hz

* Now remove "Notaus" from the CNC

* Power on the Machine inside LinuxCNC

* Move near Homing position

* Home the machine

Now the machine is ready to use.

For milling the spindle needs to be warm. The manual says that you should first let the spindle run for about 1 minute on 6000rpm, then increment by 6000rpm for 1 minute until you reached your destination speed. If the spindle wasn't used for longer than one week, you should double that time.

So better is to let it run for two minutes on each speed.

There is a sample code in the Reference Section.

== Current Status==