[PRINT_FX]

hi all,

I need to program my spindle to rotate one full turn and stop on the same position...

I know i can program
S5M03
G4P.003
M05
If i calculate using the RPM/time I would come up with the right time to use as P value but, I don't know how accurate that is...

what would be the easiest way of programming it?
macro?
a G code to turn one full revolution?

thank you guys and have a great weekend

[texaspyro]

You need a spindle with a position feedback sensor to do what you want to do. Your example will fail because it can not account for the spindle acceleration / deceleration time.

Also look into what is called "oriented spindle stop" commands. Another possibility is threading/boring canned cycles.

[PRINT_FX]

You need a spindle with a position feedback sensor to do what you want to do. Your example will fail because it can not account for the spindle acceleration / deceleration time.

Also look into what is called "oriented spindle stop" commands. Another possibility is threading/boring canned cycles.

my machine has G008/G009 automatic acceleration/decceleration...

the threading/boring canned cycles are a good idea but I am limited to one CW/CWW turn, one turn CW and one back turn CWW, reason why- there is going to be wire attached to the spindle.

[Anders6612]

With what system? M19 is spindle indexing, on many machines.
M19 with an S code for indexing for example. Have you tryed that.

Example, M19 S360

[PRINT_FX]

With what system? M19 is spindle indexing, on many machines.
M19 with an S code for indexing for example. Have you tryed that.

Example, M19 S360

nothing happens, the spindle waits for the next command... I have a HMC tosnuc-888 fanuc based

[Geof]

.....I am limited to one CW/CWW turn, one turn CW and one back turn CWW, reason why- there is going to be wire attached to the spindle.

Even if you had spindle orientation I don't think it would help because most times the spindle turns a full 360 degrees then stops at the index position.

[Al_The_Man]

On most spindles that have an encoder in order to orient the spindle for tool changes etc, there is a parameter to offset/shift in encoder counts from the index.
I know Mitsubishi uses this method, and I would think Fanuc should also be capable, but as mentioned in a previous post, an encoder is needed on the final spindle.
This is OK for stopping in a repeated position, not an arbitrary one.
Al.

[norbert.barnard]

Hi,
in order to be able to control a Fanuc Serial spindle under 1 rev means that the 1rev pulse from the position coder might be a "border case" for detection purpose.

therefore the spindle needs to be controled in servo mode, which brings only 2 methods to mind, rigid tapping or threading G32 commands.

should your machine be fitted with a analog spindle, i.e. not a fanuc spindle, then the capabilities of the drive is in question. then timing could be your only option.

[lshingleton]

You need to do a few tests on the machine to find out what you can do
M19 is a positional stop and you need this as a starting point--some Fanuc controls can do multipal stop point like M19/M119/M219

Then the next one is can you machine toan s value or c value with it
M19 C100
This is what you need for what you want

M19 C0
G91 C360.0
G04 X1.0(dwell)
G91 C-360.0
G04 X1.0(dwell)
G90

[sinha_nsit]

C-axis control is the only possibility which comes to my mind, but all machines do not have C-axis control.