Messages

41

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

« on: May 30, 2011, 05:21:03 AM »

I'm still waiting on a reply from our manufacturer.

I would imagine it's this one:

http://www.fastltd.net/asd-a2_series-494_en_cd.html

Will supply the exact model number as soon as I get it, but for now I think it's either the ECMA-C10807GS or ECMA-C10807FS

42

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

« on: May 30, 2011, 04:18:52 AM »

I asked my manufacturer and this is all I got :

Delta B series .75kw servo motors
Delta AC servo drives

Would that be sufficient?

43

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

« on: May 30, 2011, 02:55:54 AM »

I remember asking our machine supplier if they tuned the servo's right, on which they replied, the servo's are pre-tuned from their supplier.

So I really have no idea if it's right or wrong or how to go about checking.

I've attached some documentation on the servo drives we using, it's the 0.75kw flavor.

Appreciate the help

44

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

« on: May 29, 2011, 08:15:31 AM »

Exact Stop makes no difference unfortunately

45

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

« on: May 26, 2011, 03:13:34 PM »

Ok so we decided to do some more testing by first engraving something at 1800mm/min with 600mm/min plunge feed rate and then again, just MUCH slower at 30mm/min with 10mm/min plunge feed rate.

Turns out the slower you go the better the results get, which is rather useless, but definitely shows that something is wrong somewhere, just not sure where.

The attached pics sums it all up.

46

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

« on: May 26, 2011, 12:43:09 AM »

Thank you for your efforts Richard.

Looking at your annotations it seems like you wanting the z axis to move out of the material by say 0.1 - 0.3mm when doing corner sharpening.

Am I correct in making this assumption?

I know some cam packages do this by default and will look into adding this into my existing cam package if it's the case.

The 30 degree cutter is definitely right since I've used it on a different machine cutting the same gcode without any errors in corner sharpening,so it can't be that.

Unfortunately I can't see all that clearly how your 30 degree cut went in your picture. Is it cutting away the corners or not? If not, can you perhaps send me your xml file so that I can see what differences we have in mach3.

47

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

« on: May 25, 2011, 09:34:08 AM »

Here is the gcode used for the problem area.

If anyone can cut this it would be great, then at least we'd know whether it's the machine or if mach3 is setup incorrectly.

Cutter being used is a 0.1mm d-bit with 30 degree angle.

Block size is 115mm x 70mm

Any help would be greatly appreciated

48

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

« on: May 25, 2011, 01:09:22 AM »

Thank you for the informative reply BR549. I will contact our manufacturer and ask how they've calibrated the motor to react when it comes to overrun/underrun. According to them the whole point of going ball screws/servo's/encoder was so that everything will always be in the right position since the encoder always keeps track of the movement, but I see where you going with this and it does make sense especially when you look at the sample cut results. They also assured us that the motors/servo's are 0.005mm accurate.

Richard, backlash comp is turned off. Like I mentioned previously we have run the exact same program using the exact same cutter on a HAAS machine and it cut perfectly, which leads me to believe that there is nothing wrong with the code itself?

49

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

« on: May 24, 2011, 03:16:45 PM »

DOes it do this on EVERY small sharp corner?  IF so then LOOK to the servo tuning, too much overrun will do it every time. The servo will overun the position and then back up to correct.

Just a thought, (;-) TP

BR549, please explain overrun and how one would go about detecting whether it is in fact what's busy happening?

Just to clarify some things that Marius1975 missed in mentioning:

The machine uses ball screws on all axis, driven by servo motors.

All axis has been calibrated and are 100%

We have cut the exact same program (gcode) using the exact same cutter on a HAAS machine and it came out perfectly.

The problem only occurs when doing "corner sharpening" and affects all areas that requires corner sharpening.