Thanks and questions ;)

Here's the place for discussion related to CAM/CNC and the development of the Path module.
gdo35
Posts: 167
Joined: Wed Jan 25, 2012 7:25 pm

Thanks and questions ;)

Postby gdo35 » Thu Feb 16, 2017 11:12 pm

Hi all !

First thanks to all developpers for that amazing Path module ! :o :o :o :!: :!: :!: :!:

Before my questions, here is the expected result of my first milling :
DSC_0022.png
DSC_0022.png (487.47 KiB) Viewed 297 times


It is the base of my robot.

I used the very useful sliptonic dogbone dressup which worked fine :
http://www.youtube.com/watch?v=Ix_HfaL0TxU

Just doing a profile from face was so easy... Good job !
path.png
path.png (72.14 KiB) Viewed 297 times


But I have 2 questions :
  • How can I make a profile for a XZ or YZ part ?
  • How can I set an offset to avoid my CNC to start from 10mm to 0mm but to start from 0mm to -10mm on Z axis ?

Thanks,
gdo

OS: Ubuntu 16.10
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.17.10101 (Git)
Build type: None
Branch: master
Hash: 99fa203f323927b0dd027420d4421b577b7420c3
Python version: 2.7.12+
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17
chrisb
Posts: 1630
Joined: Tue Mar 17, 2015 9:14 am

Re: Thanks and questions ;)

Postby chrisb » Fri Feb 17, 2017 12:11 am

Thank you for sharing, I always like to see real things coming out at the end.
gdo35 wrote: How can I make a profile for a XZ or YZ part ?
Currently I think you have to make a clone and turn it by 90°
How can I set an offset to avoid my CNC to start from 10mm to 0mm but to start from 0mm to -10mm on Z axis ?
You should not work with your machine's absolute coordinates but with workpiece coordinates. If your machine controller cannot handle the latter (which I hardly can imagine) you can adapt the post processor.
Last edited by chrisb on Fri Feb 17, 2017 3:46 pm, edited 2 times in total.
triplus
Posts: 4833
Joined: Mon Dec 12, 2011 4:45 pm

Re: Thanks and questions ;)

Postby triplus » Fri Feb 17, 2017 12:14 am

Nice to see such projects! Thanks for sharing.
gdo35
Posts: 167
Joined: Wed Jan 25, 2012 7:25 pm

Re: Thanks and questions ;)

Postby gdo35 » Sat Feb 18, 2017 12:53 pm

chrisb wrote:Currently I think you have to make a clone and turn it by 90°

Not very practical but not too difficult either.

chrisb wrote:You should not work with your machine's absolute coordinates but with workpiece coordinates. If your machine controller cannot handle the latter (which I hardly can imagine) you can adapt the post processor.

I work with absolute coordinates in linuxcnc... :( I will check deeper into docs to find if I can work with relative coordinates...

Thanks,
gdo
chrisb
Posts: 1630
Joined: Tue Mar 17, 2015 9:14 am

Re: Thanks and questions ;)

Postby chrisb » Sun Feb 19, 2017 10:04 am

gdo35 wrote:I work with absolute coordinates in linuxcnc... :( I will check deeper into docs to find if I can work with relative coordinates...

I am sure you can, we had this here recently.
gdo35
Posts: 167
Joined: Wed Jan 25, 2012 7:25 pm

Re: Thanks and questions ;)

Postby gdo35 » Fri Feb 24, 2017 9:51 am

Thanks for your reply.

This topic is too general and I will open a more specific one on each problem.

chrisb, thx for help, I found some clues with G10 L2/L20 instructions. I have to test this.

gdo
chrisb
Posts: 1630
Joined: Tue Mar 17, 2015 9:14 am

Re: Thanks and questions ;)

Postby chrisb » Fri Feb 24, 2017 10:12 am

gdo35 wrote:Thanks for your reply.

This topic is too general and I will open a more specific one on each problem.

chrisb, thx for help, I found some clues with G10 L2/L20 instructions. I have to test this.

gdo
You're welcome, I think it is rather the G54 - G59 series of GCodes where you can define different coordinate systems