[colton_m]

Hello,

I am writing my own machine warm up program that will ramp up the spindle speed while also moving the XYZ axis.

I would like to know what peoples experiences have been with different warm-up times?

In my case I am referring to a 12,000 RPM direct drive spindle.

How much time do you figure is adequate to ramp this spindle up to full speed in 100rpm increments?

10 minutes? 15 minutes? 20 minutes? 25 minutes?

Thanks,
Colton,

[bhurts]

I don't know if you need to ramp up in 100 rpm increments. On my hurco with 8000 rpm spindle there is a built-in warm up program. It does not move z. It starts the spindle at 100 rpm while moving x and y thru there complete travels at 100 ipm. It runs the table at that speed for the entire 15 minute warm up. It changes the spindle from cw to ccw after 5 minutes and increases rpm to 1000 then after another 5 minutes goes to cw again at 3000 rpm. I believe it is a pretty good warm up cycle and was built in by the manufacturer. It's real intention is to stabilize the machine temperature to reduce the likelihood of parts changing size during production. It also has the added benefit of getting the ways oiled and the spindle oil temperature stabilized.

Ben

[Ydna]

I run a derivative of the stock spindle warmup program which has some table movements added, but it's not much different. I like to run the table around a little bit to help distribute grease on the entirety of the linear rails and the ballscrews. The other thing it does is help to get the way cover gaskets up and moving. After those movements there's a subroutine call to the spindle warmup.

FWIW my axis warmup program runs at 300-IPM, it follows the extents of the XY travel twice then *some* of the Z-travel (don't want to smash any fixtures that might be installed on the table).

I've noticed that the direct-drive spindles seem to take less time to "warm up" compared to the older belt and gear drive systems. The belts and gears create more drag onto the spindle which is totally eliminated with the direct system. For instance I have a 1999 VF2 with 10krpm gearbox (belt-driven), so if I immediately fire up the spindle to max speed on monday morning, the current commands screen reports a spindle load of around 60%. That's with an empty spindle just spinning on its own! At the end of the 20 minute warmup program, the load drops to around 30%. Letting the machine run with a moderate speed for another 10-15 minutes will reduce the load down to around 18% and it almost never goes lower than that unless running on the lower range of high gear. Compared to the newer spindles, they're ready to rock after the typical warmup cycle and might even be able to shorten it up depending on the environment and application.

[rcs60]

i WORK ON A HAAS VF2S THAT HAS A SPINDLE WARM UP LIKE THIS
AT THE BEGINNING HAAS SAYS FOR A 12K SPINDLE PUT SPINDLE OVER RIDE AT 120%
IT RUNS 20 MINUTES TOTAL
M3S500
G4U300.
S1000
G4U300.
S2500
G4U300.
S5000
G4U300.
S7500
G4U300.
S10000

[Cshade30]

The warm up that I have currently does not "HOME" the axis, rather I leave the machine out of home position and allow the machine to find home upon start up. Then I fire my "warmup" program that has a length of 15 minutes at a variation of spindle speeds. If you would like I could show you some examples of my program. I would keep the program to 15 minutes at maximum I can't imagine too many managers/owners that want to pay for a machine to spend more than that warming up before each shift.

[colton_m]

Hi Everyone,

Thanks for the comments. I settled on a warm up program that moves the XYZ axis and ramps up the spindle over 20 minutes.

I was able to make a program that covers the entire travels of my machine (VF3) moving gradually from 200 IPM to 700 IPM, while ramping the RPM from 100-12000, 100rpm at a time.

I have posted the code below for anyone that would like to use it. Works slick, you just have to change the code to suite your max RPM and travels.

%
O00002
( VF3-SS SPINDLE / TABLE WARM UP )

( ENSURE SPINDLE IS EMPTY )

G20
G00 G17 G49 G40 G80 G90

G17 G01 G90 G53 X-20. Y-10. Z0. F300.
M05

#100= 0

M97 P100 L10
M97 P200 L10
M97 P300 L10
M97 P400 L10
M97 P500 L10
M97 P600 L10

#100= 0

G01 G90 G53 X-20. Y0. Z0. F700.
M05
M30

N100
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F200.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99

N200
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F300.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99

N300
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F400.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99

N400
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F500.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99

N500
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F600.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99

N600
#100= #100 + 100
S#100 M03
G53 G02 X-10. Y0. Z-3. I10. J0. F700.
G53 X0. Y-10. I0. Z-6. J-10.
G53 X-10. Y-20. Z-9. I-10. J0.
G53 X-20. Y-10. Z-12. I0. J10.
#100= #100 + 100
S#100 M03
G53 G03 X-30. Y0. Z-9. I-10. J0.
G53 X-40. Y-10. Z-6. I0. J-10.
G53 X-30. Y-20. Z-3. I10. J0.
G53 X-20. Y-10. Z0. I0. J10.
M99
%

[Ken_Shea]

"moving gradually from 200 IPM to 700 IPM"

Had a chuckle over that, you starting out where my TM-1 maxes

[colton_m]

"moving gradually from 200 IPM to 700 IPM"

Had a chuckle over that, you starting out where my TM-1 maxes

Some modification may be required haha but it works great.

https://youtu.be/ER13oe6pEPM