Centroid Community CNC Support Forum

glbreil wrote: ↑Sat Jan 27, 2024 5:39 pmOnce I have set home using M26/X/Z can I just use a G28 to return there without messing up my home setting.

cncsnw wrote: ↑Sun Jan 28, 2024 7:25 pm Not quite right, but if you do not have a jog panel pendant or console, and you never use the keyboard jog equivalents, then your fix will work just fine.

I would have swapped SkinJogAx2Plus_M_SV and SkinJogAx2Minus_M_SV between the two lines, so that the upward-pointing jog buttons in all three contexts do a minus jog, and the downward-pointing jog buttons in all three contexts do a plus jog.

cncsnw wrote: ↑Sun Jan 28, 2024 11:43 pm Those sections of the PLC program do take a little consideration.

First, remember that it is initially based on the hardware jog panel and keyboard jogging, where keys have fixed addresses: the jog key in the center of the jog panel that points up (Y+ on a mill, X+ on a lathe with rear-mounted tools, X- on a lathe with front-mounted tools) is always INP1089 (or JPI33). The up arrow key on the keyboard is always SV_PC_KEYBOARD_KEY_87.

Second, note that there are several lathe configurations to be supported, preferably without having to have a different PLC program for every one:
1) Horizontal lathe with rear-mount tools: Z- left, Z+ right, X+ up, X- down (the default)
2) Horizontal lathe with front-mount tools: Z- left, Z+ right, X- up, X+ down (selected by adding 2 to parameter 1)
3) Vertical lathe with the carriage on the right: X- left, X+ right, Z+ up, Z- down (selected by adding 4 to parameter 1)
4) Vertical lathe with the carriage on the left: X+ left, X- right, Z+ up, Z- down (selected by adding 4+2=6 to parameter 1)

So the purpose of the four separate jog key stages is to map the presumably-fixed jog key addresses to the desired functions for the machine, according to the value of parameter 1.

If you compare JogKeysNormalStage with JogKeysInvert2Stage you will see that axis #1 (Z) jogging is unchanged; and that, for axis #2 (X) jogging, the references to jog panel keys (Ax2PlusJogKey_I and Ax2MinusJogKey_I and keyboard equivalents (KbJogAx2Plus_M and KbJogAx2Minus_M) have been swapped. The USB MPG jog keys (UsbMpgAxis2JogPlus_M and UsbMpgAxis2JogMinus_M) do not need to be swapped, because those keys always say "Jog -" and "Jog +" respectively, and are not laid out in a way that is specific to machine geometry.