<SOLVED> G1 Not working in program

This is very confusing. Can you start at the beginning, or is it all working now?

Using ladder for delays will work, and if you are comfortable with that then that is fine, but there may be other ways (possibly even built-in ways).

If you give us a more clear problem-description then we may be able to provide answers.

Jerre122 wrote:

Any idea about other ways for getting a delay when reversing spindle directions?

Why do you need a delay? Knowing the problem you are trying to solve would make it easier to know what the best solution is.

The behaviour you want might well be something that you can program into the spindle drive.

Alternatively, if you just want a slow ramp down and up again, look at using a limit2 HAL component between motion.spindle-speed-out and whatever it drives. www.linuxcnc.org/docs/html/man/man9/limit2.9.html


If you are only using M3 and M4, and your spindle runs full speed in either direction, then you can probably do what you want with the "timedelay" HAL function: www.linuxcnc.org/docs/html/man/man9/timedelay.9.html

To avoid a delay when starting from stopped you probably need two timedelays and two XOR functions.
M3-out = M3-in XOR timedelay(M4-in)
M4-out = M4-in XOR timedelay(M3-in).

In HAL code that would look a bit like:
Maybe ladder is actually simpler?

Jerre122 wrote:

If you suddenly reverse the spindle the contactor wich activates the reverse spindle direction would activate before the contactor of the electric spindle brake. The brake wouldn't activate and the spindle would suddenly reverse (in a fraction of a second really) and the 3 V-belts going to the gearbox would slam against their case. I don't think this can be good for the spindle motor either.

It's actually probably OK, depending on a number of factors. If the only components involved are a 3-phase motor, the contactors and the incoming mains supply. This is "plug reversing" and it wasn't unusual to have motors deliberately wired to allow it in the days before electronic speed control. It is one way to stop you lathe faster, for example.
I spent some time using a surface grinder where the table traverse was controlled by a an electric motor that was plug-reversed by the trip cams on the table. That was doing 1second clockwise, plug-reverse, 1 second anticlockwise all day.

It's a nasty thing to do to an electronic speed control, but they can typically be set to ramp down and up again anyway, when they are reversed.

Depending on the number of reversals it might even be better in the long term than running a brake. If the motor can handle the reversal without overheating then it will not suffer any wear during the reversal, whereas brakes do wear fractionally with every operation. The belt slap sounds worthy of concern though.