Drilling Cycle Post Problems with NCStudio

[Anonymous]

Hi,

I wonder if anyone can help me with a post issue between fusion and NC Studio. I am using the post as found below:

 https://forums.autodesk.com/t5/fusion-360-computer-aided/fusion-360-post-processor-error/m-p/6378191...

Most operations are working fine. However in the below fusion file I have a simple drilling cycle.....

http://a360.co/2ntmnzE

I first tried this as a deep drilling cycle. In the Fusion simulation this 'peck' drills as expected at 3mm steps. However when the machine runs this it does something very different. It appears to plunge 5mm straight away, and then begin a strange pecking cycle, whereby the retract height seems to increase as well. Sorry this is a bit vague, but it is hard to identify exactly what the machine is doing. It does complete the holes but it is not doing what fusion suggests. The feed rate between holes is also slow (500mm/min). 

In an attempt to work around (and knowing I probably dont need to peck at this depth) I changed the cycle to a simple drill. However this has other similar problems. It does 2 x full depth drills, does not retract far enough and then traverses across the workpiece at a height that does not clear the stock face!

Finally in addition to the above there appears to be issues with the pattern of the holes.  the holes are patterned along the X axis. However on importing into nccad and running, the first two holes are completed, but when trying to do the third (and subsiquent top holes) hole, for some reason the machine comes back and drills the second hole repeatedly instead of creating the subsiquent 3 top holes as in the pattern. I therefore have to manually change the coordinates in the G code to successfully complete the holes. Here is the code that is produced:

******************************

(1001)
(clamp ring holes only, dia 5 cutter)
(T1 D=5 CR=0 - ZMIN=-11 - flat end mill)
G21 G90 G40
G17
G28 G91 Z0
G90

(Drill1)
M9
T1 M6
M3
G54
M8
G0 X35 Y69.5
G43 Z15 H1
Z5
G98 G81 X35 Y69.5 Z-11 R5 F500
Y5.5
G80
Z15

(Drill1)
M3
M8
X111 Y69.5
Z15
Z5
G81 X111 Y69.5 Z-11 R5 F500
Y5.5
G80
Z15

(Drill1)
M3
M8
X187 Y69.5
Z15
Z5
G81 X187 Y69.5 Z-11 R5 F500
Y5.5
G80
Z15

(Drill1)
M3
M8
X263 Y69.5
Z15
Z5
G81 X263 Y69.5 Z-11 R5 F500
Y5.5
G80
Z15
M9
G28 G91 Z0
G28 X0 Y0
M30

**************************

I can manually edit the above to fix the coordinates/pattern problem. But I am stumped at the pecking/height issues.

A final minor annoyance is that the post always puts the G28 at the start, causing the machine to lift the Z axis to its limit switch and shut down. So G28 needs to be deleted from each program prior to running.

Regards

Dan

[AchimN]

Hi Dan,

i do not see an issue with the NC program itself.

The pattern looks totally correct to me and the coordinates change as expected.

Regarding the drill cycles, I also cannot see the issue here.

But, you said that the tool does not retract enough after the drill cycle and traverses not above the stock face.

That makes me think of a wrong G54 origin.

So, in your Fusion part you did set the origin to the lower left corner of the part at the top of the stock.

Did you set that location into the machine as well for G54?

[gpringleW3EPU]

Dan, I had exactly the same issue with a new machine today. We are running v 5.5.

However I also have another machine running Ncstudio on a different version (8.2) which does not have this issue and so I expect it could be software related.

Did you mange to sort this on your machine.

[infoD4F2F]

Hello, I was just wondering if you had managed to sort out the problem with the drilling. My machine is doing the exact same thing. Any help you could give me would be very much appreciate it regards Steve

[spoonykeith2]

Yeah same here, usng NCStudio 5. The simulation in Fusion 360 works fine but on the machine itself it's totally wrong. Did anyone figure it out?

[steamsb1]

Check the global parameter in the NC Studio settings, on the machine itself. There may be a retract of 10 mm (G73~G83) indicated there, it must be reduced to an acceptable value.

[cadop5R9X9]

I'm having the same issue with ncstudio v5.  Anyone find a solution to this, or is there a way to modify the fusion drill operation to use generic vertical movements like a plunge instead?