topic ISEL Fusion 360 in HSM Post Processor Forum

ISEL Fusion 360

Anonymous — Sun, 10 Jan 2021 16:47:19 GMT

I have recently purchased a second hand ISEL milling machine. My experience is limited to a self built mill using mach3. When I create the NCP files the mill requires (amazing that Fusion has support for ISEL), the coordinates all use MOVEABS (I'm assuming this is absolute), can this be changed as I'm far more used to relative positions?

If it can't be changed is there anything I need to be aware of? My tests so far have all failed due to hitting a soft limit but will happily run all the NCP files provided with the mill.

Many thanks

Re: ISEL Fusion 360

will_1 — Wed, 13 Jan 2021 15:45:31 GMT

Hi @Anonymous ,

The post can certainly be changed to use incremental moves instead of absolute moves

To find help doing this you could check out the services marketplace.

https://servicesmarketplace.autodesk.com/

If you want to tackle this we can give you a few pointers.

I personally don't recommend the use of incremental moves. It can introduce accumulating roundoff error which might not be an issue in your case. But I also find it troublesome if you do happen to adjust any values at the nc code level since all values downstream are affected by it... but up to you.

For the soft limit error, I would start by double checking that what you have programmed fits into the machining envelope and that the workoffset on the machine is set at a reasonable position if you haven't already.

Thanks,

Will

Re: ISEL Fusion 360

Anonymous — Thu, 14 Jan 2021 19:14:29 GMT

Hi Will

Thank you for your reply

Based on your comments I persevered with absolute and am finding it 'absolutely' fine. Hitting soft limits was being caused by a line in my NCP file "N30 WPCLEAR" which I suspect was clearing my workpiece zero, removing it has solved my problem and for the first time I've actually used the machine with one of my designs. Are there any side effects of me removing the WPCLEAR that I should be aware of?

Many thanks

Re: ISEL Fusion 360

AchimN — Fri, 15 Jan 2021 09:57:12 GMT

Hi @Anonymous

You are right with your assumption about WPCLEAR. This is similar to G53 (machine coordinates) and we use that for doing safe retracts.
I did work with ISEL in germany directly to proove out the post a while ago but we didnt ran into that problem.
Therefor i´ve updated the ISEL post and added a property where you can specify if you want to use WPCLEAR or simply the clearanceHeight from the CAM system.

The updated post will show up on the library soon:
https://cam.autodesk.com/hsmposts?p=isel

Re: ISEL Fusion 360

Anonymous — Fri, 05 Feb 2021 13:19:51 GMT

Thanks that's great, really appreciate it.

I've had my first successful piece of work from design to finished shape in MDF. Only simple stuff at the moment but its working. 🙂