Mdi program question

[Rick46]

Long story short. Replaced X axis ballscrew and maintenance wants to run the table back and forth for few hrs to break in the ballscrew. Is there a few lines I could manually command from mdi with a m99 at end so that it would loop back and run for say 2 hrs total or a program that will run for an exact 2 hrs.. thanks in advance.

[Guest]

You could use a DO/WHILE loop checking the cycle time...

 

WHILE[#nnnnLE120]DO1

G0G91X40.

G0G91G28X0

END1

M30

 

The nnnn being the parameter that captures cycle time. I'm on a plane right now so I can't get to my manuals or else I'd find it.

[Matthew Hajicek - Singularity]

I could be wrong but I don't think MDI likes flow control.  I would write it as a program, then you can tweak it an run it again later if you want.

[Guest]

Using a while loop and the timer function will allow will allow you to write a program to run for a set length of time. Whether you can run a simple program like that in MDI really depends on the control. I have run machines that only accepted one line at a time and others where the MDI was essentially a blank program file.

[Rick46]

Oh yea it's a Fanuc 18i-Mb control thanks.

[Rick46]

Ok thanks for suggestinions I just ended up righting a path in master cam and checked the backplot time and tweaked it to get a run time of 3 hrs. Just going to run with that. Thanks again for advice..

[Guest]

I know you already solved your issue but I figure I will post this in any case. This is a simple program I wrote awhile back to warmup the machine for a specific amount of time. A few variables would likely need to be tweaked depending on the requirements of your control.

(AUTO MACHINE WARMUP ROUTINE
(THIS PROGRAM WILL PAUSE FOR A SPECIFIED LENGTH OF TIME AND THEN BEGIN WARMING UP
(YOUR MACHINE. 

G90 G40 G71 G94 G01 G25
(G25 = WAIT FOR SPINDLE TO REACH PROGRAMMED RPM = OFF, G26=ON

G50.6 P40.00	(SET FEEDRATE OVERRIDE TO 40%

(# OF HOURS BEFORE THE MACHINE WARMS UP. IF DESIRED, SETUP BEFORE
(YOU LEAVE FOR THE NIGHT AND THE MACHINE WILL AUTOMATICALLY BEGIN WARMING UP 
(AFTER A PRE-DETERMINED INTERVAL. I AM THE ONLY GUY WHO RUNS MY MACHINE. WOULDN'T
(USE THIS IF OTHER PEOPLE OPERATE YOUR EQUIPMENT. USE THIS FEATURE WITH CAUTION.

#101=0.000 (SET TO 0 TO WARM-UP IMMEDIATELY
	
(PAUSE HERE FOR #101 NUMBER OF HOURS BEFORE INITIATING THE WARMPUP ROUTINE
	
	#101=#101*3600	(WITH #101=1, NCPLOT SHOWS THIS AS ONE HOUR, MIGHT NEED TO DIVIDE BY 1000
	G4 X[ROUND[#101]]	(FOR YOUR CONTROL.


#1=0.5      (NUMBER OF HOURS TO WARMUP
#2=120     (DESIRED X TRAVEL, FROM HOME
#3=70       (DESIRED Y TRAVEL, FROM HOME
#4=80       (DESIRED Z TRAVEL, FROM HOME

#5=1000	(SPINDLE LOW RPM
#6=2000	(SPINDLE MEDIUM RPM
#7=3000	(SPINDLE HIGH RPM

#8=20		(% OF TIME @ LOW RPM
#9=30		(% OF TIME @ MEDIUM RPM

      #10=100-#8-#9	(REMAINING TIME IS SPINDLE @ HIGH RPM	

	#8=#8/100
	#9=#9/100
	#10=#10/100

IF[#8GT1] THEN #3000=1	(% OF TIME @ LOW RPM MUST BE LESS THAN 100%
IF[#9GT1] THEN #3000=1	(% OF TIME @ MED RPM MUST BE LESS THAN 100%
IF[#8+#9GT1] THEN #3000=1(% OF TIME @ LOW & MED RPM (COMBINED) MUST BE LESS THAN 100%

(MOVE TO HOME POSITION
G00
G53 Z-1 X1 Y-1 F600
M01

(RESET THE HOUR TIMER
#3002=0
G4X1
G103 P1 (LIMIT THE LOOK AHEAD TO 1 BLOCK
WHILE[#3002LT#1]DO1
#11=#7	(HIGH RPM
IF[#3002LE[#1*[#9+#8]]] THEN #11=#6	(MED RPM
IF[#3002LE[#1*#8]] THEN #11=#5		(LOW RPM
M4S[#11]
G00 U[#2] V[-#3] W[-#4]
#11=#7	(HIGH RPM
IF[#3002LE[#1*[#9+#8]]] THEN #11=#6	(MED RPM
IF[#3002LE[#1*#8]] THEN #11=#5		(LOW RPM
M4S[#11]
U[-#2] V[#3] W[#4]
#103=#3002
END1

#102=#3002	(TOTAL WARMUP TIME

(T0101
(G00 X0 Y0
(G01 F500

(RESET FEEDRATE OVERRIDE TO 100%
G50.6 P100.00
G26	(WAIT FOR SPINDLE TO REACH PROGRAMMED RPM
M30