Messages

31

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 13, 2011, 02:51:41 PM »

Ah yes 2,000mm/s/s is correct.

Unfortunately I'm not at the machine at the moment, but will upload the code and xml tomorrow night for your much appreciated evaluation

32

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 13, 2011, 02:26:30 PM »

Howdy Hood,

It's definitely not in Exact Stop Mode, I've made 200% sure of that. Heck I've run it in exact stop mode just to see if it makes any difference, which is obviously doesn't, just a bit slower.

My accel/decel rate is 0.3 seconds, I've had it on 0.1 second but the machine starts sharking a bit, so I tuned it down a bit just in case.

It's currently on Velocity 10 000mm/min with accel/decel on 2000 mm/min, but still no real change in cutting time.

Any more suggestions would be greatly appreciated

33

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 13, 2011, 12:03:57 PM »

Hmmm not sure how to put this, but how does one get mach3 to run smoother when engraving?

For example, when engraving the letters "finest ten" in the picture above, the feed rate is set at 500mm/min, however in mach3 the feed rate keeps changing, usually well below 500mm/min as it goes along.

I can understand that it has to slow down here and there to take tight corners etc etc, but once again, when running this on a HAAS machine it's pretty much setting on 500mm/min the whole time.

On our current machine everything takes about 3 times longer to engrave since mach3 keeps dropping the feed rates well below what it should be.

Would smooth stepper perhaps make mach3 run more smooth feed rate wise?

34

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 10, 2011, 06:12:05 AM »

Ok nevermind, doesn't look as if the Software manual works when attaching it here, what a pity.

35

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 10, 2011, 01:08:54 AM »

Plenty info on tuning in the manual with descriptions on what each parameter does, just figuring out how far you can push each parameter,keeping in mind that some have to be moved x4 and other /1.5 otherwise they cause resonance.

I'm just a bit confused still about the "Limit of Load Inertia Estimation" parameter as I'm not really understanding how one goes about changing it in auto tuning.

I've attached the software help file for tuning the servo's in case anyone gets bored and feels like reading it

Agreed BR549, it will take a lot more time getting it 100%, and yes, we did save all our old settings

PS.... had to rename the file for uploading, please rename .pdf to .chm

36

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 09, 2011, 03:34:58 PM »

Thanks for the reply Hood.

We still fiddling around with the servo software, but did notice something labeled "date scope" Just not sure which settings we should be monitoring as they have about 20 different ones to choose from

37

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 09, 2011, 02:07:41 PM »

Hmmm can't seem to find any parameters called "velocity loop" nor "position loop" BR549.

We did auto gain tuning on all the axis. Afterwards we had to adjust "Kvp: P Gain of speed loop" to get rid of the resonance on all the axis.

Then did another sample cut and wow, it's looking really good, almost 100% !!!

Only problems that remain now is:

1) The z axis is sounding a bit funny,almost as if the ball screw is hitting against the bearing when moving....rather strange, but we've taken a video and will forward it to our manufacturer tomorrow.

2) When cutting at the speed we would like to cut,which is about 3 times faster, the engraving almost returns to the state it was before we did the auto gain tuning. Which leads me to believe we'll need to up some of the parameters in order to go faster. Just need to figure out how to get rid of the resonance as we up the values.

Apart from that everything is MUCH better

38

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 08, 2011, 01:40:41 PM »

Oops I forgot to mention that all the axis settings are exactly the same, hence only the one parameter page.

PS : Can't seem to find the button to edit my previous post

39

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: June 08, 2011, 01:22:14 PM »

Ok finally got the cable to connect to the servo's for tuning.

I've attached the parameters page for the tuning as they are currently. But before I can start editing settings we first need to do some reading as to what most of them actually do.

Any input would be appreciated on the current settings

PS: camarillojohn : I understand what you trying to say and everything is right in that area, thanks!

40

General Mach Discussion / Re: Mach3 Problems - Rant!!

« on: May 30, 2011, 06:57:11 AM »

Ok here is the right info:

http://www.delta.com.tw/product/em/motion/motion_servo/motion_servo_product.asp?pid=2&cid=1&itid=2

model : asd-a0721ab

Hope it helps.