Fusion 360 Mill Post Processor for Acorn with additional Features (New Version 5)

[FlySox]

Some interesting info relevant to the tapping discussion on pages 5 & 6 in this Tormach guide: https://tormach.com/media/asset/t/d/td1 ... _1020a.pdf

[Muzzer]

I found that Peter Smidt doesn't cover dwell in G84, as it's not std in Fanuc Macro B. However, as pointed out, it's a parameter used in Centroid's G84. I played with this some time ago - and thought I had concluded that it didn't help much. This evening I've just played with a dummy file, doing some air tapping and sure enough, it's clear I was talking out of my backside - not for the first or last time I'm sure.

My machine takes ages to slow down and restart due to the large motor and reduction gears in low ratio, so I need about 2.5s pause to allow the tap to revert to where it should have been if it had stopped quickly. That's with no load of course - a large tap would stop almost immediately.

Here's the line that does the tapping:
(S250 M3)
G98 G84 X0. Y0 Z-10 R5. F500. P2.5

It taps to 10mm depth with a pitch of 2mm and pauses for 2.5 seconds.


What I think I DO recall is that the Fusion 360 Centroid post doesn't post the dwell (P) times, so you need to manually edit the code if you want one. Which might be the closest I get to an excuse here. I suppose, if Swissi hadn't decided to edit the post to include the P parameter, it might have been sensible to fix the issue by editing the macro executed at the bottom of the hole (specified in parameter #75) to autogenerate a pause. But indeed the best result would be a Fusion post that passes the pauses through. That way you could always create a parametric expression in Fusion to shorten the pause with larger taps for instance.

I'll get there in the end! Apologies if I talked down to anyone along the way.

[converterking]

You can make the following modification to the onCyclePoint function in the post to output the dwell time with the tapping cycles. You will need to add the code to the 'tapping', 'left-tapping', and 'right-tapping' cases.

case "tapping":
if (!F) {
F = tool.getTappingFeedrate();
}
writeBlock(
gRetractModal.format(98), gAbsIncModal.format(90), gCycleModal.format((tool.type == TOOL_TAP_LEFT_HAND) ? 74 : 84),
getCommonCycle(x, y, z, cycle.retract),
conditional((P > 0), "P" + secFormat.format(P)),
feedOutput.format(F)
);
break;

[swissi]

The next version of the Post Processor will have the Dwell P factor of the tapping cycle.

For those who need it right now, download the post processor that I posted in this thread here that also includes the "Boundary Feature" as described in the post.

-swissi

[BillB]

I’m using Fusion 360 for CAD, CAM I posted a file yesterday to test. I selected the post processor inside Fusions list of posts. Is that one current for use with Acorn & CNC12 on there website? Or is this post here the better option?

[swissi]

I’m using Fusion 360 for CAD, CAM I posted a file yesterday to test. I selected the post processor inside Fusions list of posts. Is that one current for use with Acorn & CNC12 on there website? Or is this post here the better option?

As the title of this thread says, this PP has additional features. If you are happy with the standard PP use that one. If you would like to have any of the additional features as described in this thread and in the User Guide, use this one.

It's really that simple

-swissi

[BillB]

I’m using Fusion 360 for CAD, CAM I posted a file yesterday to test. I selected the post processor inside Fusions list of posts. Is that one current for use with Acorn & CNC12 on there website? Or is this post here the better option?

As the title of this thread says, this PP has additional features. If you are happy with the standard PP use that one. If you would like to have any of the additional features as described in this thread and in the User Guide, use this one.

It's really that simple

-swissi

right I’ll use yours. Thanks.

[Greg]

I have been using your post processor successfully with v4.5 for a long time. Since updating to v5.04 it no longer switches from flood to mist coolant when using the same tool for separate subsequent toolpaths. I manly use your post for 4th axis work, I have not had a chance to try it yet hopefully nothing else has changed.

[Ashsrdtuning]

How do i download and instal this post processor in fudon 360 ?
Many thanks for the help

Ash

[suntravel]

How do i download and instal this post processor in fudon 360 ?
Many thanks for the help

Ash

Uwe