non-squareness compensation

[Sebastian Pichelhofer]

I pushed a small code commit (https://github.com/openpnp/openpnp/pull/446) yesterday and added a wiki section about non-squareness compensation with the GCode Driver today. (https://github.com/openpnp/openpnp/wiki/GcodeDriver#user-content-non-squareness-compensation).

With the liteplacer this made a significant difference. I would be interested to know if your machines are all perfect squares or if you had issues before.

Regards Sebastian

[Cri S]

I have it square. Even if machine is not square, this get corrected automatically thanks to fiducial code and manual feeder/camera position setup. As nozzle offsets are checked using camera and flour even if Z axis is not 90 deg , only controllable using laser pointer, even that cancels out. Legacy strip feeder code have the option to correct pick position on every pick in case . the only limitation is, error must be lesser or equal 3mm for 220x160 mm PCB, that is plenty room for allowed missaligment.

[Sebastian Pichelhofer]

On Sat, Feb 11, 2017 at 8:19 PM, Cri S <phon...@gmail.com> wrote:

I have it square. Even if machine is not square, this get corrected automatically thanks to fiducial code and manual feeder/camera position setup.

I actually noticed the problem because my fiducials would be recognized correctly during the fid measurement run but had a significant error offset afterwards when moving the camera to FIDs manually. This was already noticeable with boards around 60mm height. My machines non-squareness factor is 0.006

Regards Sebastian

 

As nozzle offsets are checked using camera and flour even if Z axis is not 90 deg , only controllable using laser pointer, even that cancels out. Legacy strip feeder code have the option to correct pick position on every pick in case . the only limitation is, error must be lesser or equal 3mm for 220x160 mm PCB,  that is plenty room for allowed missaligment.

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[Lisandro B]

This is a great feature that will allow people on cheap machines and/or built without experience to work properly
Also, on big machines, like mine 600*600mm it is a lot of work to square perfectly. I have done it, but lots of hours

[Jason von Nieda]

Nice work Sebastian! Thank you for this contribution!

Jason

On Sat, Feb 11, 2017 at 5:03 PM 'Lisandro B' via OpenPnP <ope...@googlegroups.com> wrote:

This is a great feature that will allow people on cheap machines and/or built without experience to work properly
Also,  on big machines, like mine 600*600mm it is a lot of work to square perfectly.  I have done it,  but lots of hours

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[Morteza Kh.n]

Greetings,

Where can I find GcodeDriver.java in a windows machine?

[Jason von Nieda]

Hi Morteza,

Are you looking for the source code, or do you just want to use GcodeDriver? If you want the source code you have to clone that from Github at https://github.com/openpnp/openpnp. There is more information about getting started with development at https://github.com/openpnp/openpnp/wiki/Developers-Guide.

If you just want to use GcodeDriver with your machine, it's already included in the download. Just select GcodeDriver in the driver selection dropdown: https://github.com/openpnp/openpnp/wiki/Setup-and-Calibration%3A-Driver-Setup

Jason

On Tue, Feb 14, 2017 at 9:19 AM Morteza Kh.n <morte...@gmail.com> wrote:

Greetings,

Where can I find GcodeDriver.java in a windows machine?

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[Zeljko Zed]

Hi,

I have plan to make first start of my machine next days. X,Y travel is about 600x600mm and I am little afraid that's not in square. After read this post  I think that this possibility is excellent. Please help me to understand where I must exactly enter formula for non square (and exactly which form of formula). I read carefully from this page: https://github.com/openpnp/openpnp/wiki/GcodeDriver#user-content-non-squareness-compensation   

and point 5. is not clear for me... is that from g-code control panel MOVE_TO_COMMAND or...? 

Thank you

Zeljko

[Jason von Nieda]

Hi Zeljko,

In step 4 you should come up with a mm measurement. You are measuring the distance from the line. If you come up with 0.5mm and you moved 100mm along Y before measuring then you calculate 0.5mm / 100mm = 0.005 and you enter 0.005 here:

Jason

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[Zeljko Zed]

"From the forest I can not see the wood" it is so clear,  I can't see this... OMG.

THANK YOU and I'm sorry to bother you...

Zeljko

On Saturday, February 11, 2017 at 6:10:02 PM UTC+1, Sebastian Pichelhofer wrote:

[Jason von Nieda]

It's no bother at all. Good luck! :)

Jason

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[Lisandro B]

The awesomeness this software finds no limits