incremental z movement

Hi all. I am new to this forum and just started using this software. I am trying to use this software in g-code format on a cancellation machine. I would like to output the z moves as an incremental statement rather than absolute. eg g91 z 0.5 rather than g1 z1 then g1 z1.5. Hope this makes sense and hope someone can help.Thanks.

I don't believe there is an option to do that with the Z move. Probably your easiest workaround will be to write a script or small program to modify the G code file. A Z move usually only takes place every layer (unless "spiral vase" is selected), so it would also be possible to modify the G-code file by hand in a text editor as there are not that many places it needs changing (just do a search for the letter "Z" and change the numbers by hand).

Dave

Hi Thanks
I'm actually running this software on a laser powder deposition machine that is designed for cladding aerospace parts. the machine is fanuc based. I would like to put various bits out as # variables that can be controlled at the beginning of the program. i.e. feed as F#300 and not F500.
This would apply to rapid, cross traverse etc with a different variable rather than an actual value.

My next point is because i am using a powder feeder i want the powder to stop at the start point with no cross over or seam as this causes build up. Can this be done. I can easily add code on travers commands but need to physically shorten the path so as not to overlap on each slice.
Hope someone can help.
regards
paul

Thanks
I was really wondering if there is anyway to get to the post processor as this is what i am used to whn using cad cam software.

Slic3r is designed for FFF machines. I should think you need to get hold of slicing software that is specific for the 3D printing technology you are using - while they may have a common basis, they each have sufficiently different requirements that a toolpath that works for one technology is unlikely to be suitable for a different technology. You can certainly use a knife to loosen a screw, and digital callipers to tighten a nut, but it is better to use a tool that is designed for the job rather than misusing a tool designed to do something different.

Dave

Thanks Dave. I understand your point and agree, however I am currently doing a bit of r and d. The software does 90% of what I need it to do. It would just save me some time if I could edit the post processor. The initial trials, though primitive are promising.

Being at R&D department, you may consider starting from the sources [github.com], forking the project and eventually modifying it to cope with your needs.