M30 Macro

[Houseman303]

Who can help me? I've studied TB300 and also the instructions for writing macros, but I can't figure it out. (I can only think of M5 and Goto 0, but it won't be that easy.)

M30 should:
jumps back to the beginning of the program

[Nigelo]

What exactly are you trying to accomplish? You are not correct as there is no "should" about it - Perhaps you mean "I would like to..."

M30 designates END of Program and by default, performs no operation. It is therefore understandable that the final lines of your program remain on screen to provide useful end of program information. However, simply pressing cycle start at this stage will rerun the same program without additional steps e.g. no Reloading program is required.

If you are looking to rerun program, say 5 times to "mass" produce 5 parts, then after loading program and graphing to check for errors, hit RUN and set Repeat to ON and enter 5 followed by Enter. Now hit Cycle Start. Your Program will, of course, need a step at the start that allows loading further stock to be machined if not automatically done with an auto loader. The system will keep track of the number of parts machined until it reaches 5 in this example.

Note that entering 5 in the RUN menu and leaving Repeat set to the default OFF will require a Cycle Start to restart each subsequent part.

[tblough]

If you want your program to run continuously, add a block number at the beginning if there is not one already at the line you would like to resume from. Then add a GOTO nnn line, where nnn is the prior selected line number, near the bottom of the program. You want to position the goto after the last movement lines, but before the shut down lines at the end.

You need to understand G-code so you can position the return marker and goto statements in the correct spots. For instance, do you want to leave the spindle and coolant running at the end and restart at the first cutting move? Or, do you want to stop and restart the spindle each loop? Do you need a pause for the operator to switch parts? Do you want to display any informative messages?

What you are asking for is not a simple thing, and could cause serious injury. That is why there is no "canned" solution to automatically restart a program.

[Houseman303]

The M30 should reset the display to the beginning of the program, not restart it.

[Nigelo]

The M30 should reset the display to the beginning of the program, not restart it.

I repeat there is no "should" about it and what are you trying to do other than pick holes in software that functions correctly? Read the manual.

[cncsnw]

M30 "should" rewind the spool of punched paper tape, so that the next Cycle Start starts over at the beginning of the program.

Sadly, Centroid controls lack spools of tape, so we have to settle for behavior where M30 just ends the program, and Cycle Start starts at the beginning by default.

[cncsnw]

If you want M30 to go back to the beginning and run from there, just make your own M30 macro (file mfunc30.mac) that contains either an M2 (if you want it to move Z to home and wait for Cycle Start) or M102 (if you do not want it to move to home or wait for Cycle Start). Then your M30 will do what you want.

[Houseman303]

M2 is not the solution. The control waits for the cycle start on the M30 and when I do that, the program restarts and waits when the tool is changed.

[cncsnw]

If you do not want the control to wait for Cycle Start, then put in M102 instead of M2.

[Houseman303]

M30 is not supposed to do anything other than display the program from the beginning on the screen. do not restart and run. The background for me is to know exactly which program is loaded. That's right at the top, but I don't really look there all the time. For me there is no limitation on the program name/description in the program.