Fixed camera lighting upgrade

Mike · November 22, 2022, 08:35:59 PM

Quote from: trev on November 21, 2022, 11:46:50 PM
Mike, how is the OTF camera performing with the white led upgrade?

Huge improvement - almost never need to tweak thresholds now, and pretty much unaffected by all but direct sunlight.

trev · June 19, 2023, 11:09:04 PM

Mike, is the wiring to the LEDs 12v? I am thinking of tracking a board with some white me LEDs on.

Mike · June 20, 2023, 10:10:10 AM

Yes, 12V - it does dip a bit when the vacuum pump is on, but that's not an issue as it's always on when you need vision, so consistent.

trev · June 20, 2023, 04:29:18 PM

I have a switched mode power supply so don't think I will see the dip. I found that initially the OTF camera would work but as the day progressed things would just get more and more unreliable. Maybe sunlight. But it was just a shame. Looking froward to implementing this now as the RV4s running with OTF can actually run at a decent pace.

trev · July 05, 2023, 03:13:54 PM

Managed the white led OTF upgrade. Seems to be doing the trick. Took a bit of calibration and a placement offset adjustment in the cdf file but placed great after that. Real speed improvement to be able to use OTF reliably.

Thanks Mike for the initial info.

Mike · July 06, 2023, 01:48:55 PM

Quote from: trev on July 05, 2023, 03:13:54 PMManaged the white led OTF upgrade. Seems to be doing the trick. Took a bit of calibration and a placement offset adjustment in the cdf file but placed great after that. Real speed improvement to be able to use OTF reliably.

Assuming you removed the mirror, did you do the camera centre adjust as mentioned above?
Changing illuminator shouldn't need a placement offset adjust, only the brightness threshold.

trev · July 06, 2023, 02:37:36 PM

Hi Mike

When I put the mirror back on, I did focus, centre and ratio? in calibration. I do not believe I had the offset previously but talking to a friend who used to run RVs he said he used to have one cdf for OTF and one for Fixed because he always had an offset he had to put in.

Are you saying that if the calibration is performed correctly then the OTF calibration will take care of any offset?

Mike · July 07, 2023, 07:21:40 PM

Just going on first principles, once calibrated, both cams should be aligned to "true" centres and no offset should be needed in the CDF.
It could be there are some oddities in the software ( or maybe a bent nozzle shaft), but I've never had any need to do any manual offsetting, apart from the occasional pick offset on asymmetrical components

trev · July 11, 2023, 12:21:21 AM

But the OTF camera doesn't do a rotation or movement. The camera is fixed to the arm so it can't correct any error and check it's fixed. It seems to take one reading any done

Mike · July 15, 2023, 12:12:58 PM

Not sure what you mean by "doesn't do rotation or movement" that - both cameras measure offset and rotation to provide a correction for the placement position.
After doing the camera centre adjust, this should calibrate the camera positions relative to the nozzle, and placement should then be the same regardless of camera used.
There may be some threshold differences between cameras, but not placement offsets.

As mentioned above, after doing the upgrade I noticed some offsets between fixed and OTF, but these went away when I did the centre adjust - don't recall if I only did just the OTF, or both.