Nozzle calibrations work not corectly
bacrua
Output:
Ideally, regardless of the selected mode, manual calibration was always performed by pressing the "manual calibration" command (this is logical, since choosing a mode only saves you unnecessary trouble, and not how you should not block the work manually if such a situation arises).
Change the program code so that the selection of the “manual”, “houming” mode takes effect without restarting the program.
Since it is very annoying when the calibration error occurs several times in a row.
ma...@makr.zone
> Change the program code so that the selection of the “manual”, “houming” mode takes effect without restarting the program.
Sorry I don't understand. I need a longer explanation how it
should behave in what case.
However, I feel that the real problem is the pipeline. You need
to make it more robust, so that failures almost never happen. I'm
confident this can be achieved.
I consider calibration as part of homing a very good practice and
failure should also fail the homing cycle. That's sort of a
pre-flight check for the machine and vision in particular, same as
visual homing.
If you "postpone" the vision problem it will instead fail in the
middle of a job where it is much more inconvenient, or could even
lead to spoiled parts/boards.
_Mark
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ozzy_sv
bacrua
1 Run the program, change the nozzle calibration mode "MachinHoume" and apply the changes.
2. restart the program and start up the machine.
3. When performing a calibration, close the nozzle to cause the program to generate an error.
4. Click on the "Calibration" button. (a dialog appears that the "MachinHoume" mode is set). And it should work. Since the "MachinHoume" mode is not a blocking of the "manual mode", but a mode for convenience and getting rid of unnecessary fuss.
5. Click OK in the dialog box.
6. Change the calibration mode "manually" and apply the changes.
7 Click on the "Calibration" button (a dialog will appear that the "MachinHoume" mode is set). And it should work. Since we set the mode to "manual". The manual mode will only take effect if you restart the program.
8. Now we restart the program, restart the machine, the manual mode has taken effect.
PS. My visualisation is lost due to camera position and lighting. I turn on the lighting and the flashlight shines directly into the camera. (this is such an inconvenience of mine) But still the manual mode should not be blocked. He is to immediately correct the situation. And was not block. For example: the autopilot of an aircraft is disabled when the pilot takes the helm, immediately, without restarting and unnecessary actions. (Our situation is different. To fix it, you need to turn it on, turn it off, restart, wait and if it happens again, start over).
Example 2: The automatic traffic control light is working, but if necessary, the traffic controller comes out and does not turn off the traffic light, but manually corrects the situation.
Well, I explained as I could. THANK YOU VERY MUCH FOR YOUR WORK, WITHOUT YOU I WOULD BE WEAK.
ma...@makr.zone
After 6 you could home again. No need to restart the program.
Maybe I'm still missing something?
_Mark
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bacrua
Why, instead of making it easier, you need to make difficulties, and then overcome them.
What are the problems. I can park "home" 50 times in a row. And remake the machine, and do not turn on the lighting, and arrange it at random, and then correct it with tweezers. The question is different. FOR HOW MUCH CONVENIENT TO USE.
2. If I change the mode from "homeming" to "manual" then the changes should take effect after pressing the "apply" button. But not after restarting the program.
P.S. Or am I somehow not correct. Why the obvious things that I would do in one click, YOU do in a few or the most time consuming.
What is your age?
tony...@att.net
bacrua
In manual mode
1.turn on the machine
2 Automatic or manual transition to "home"
3 choose a nozzle
4 press the button to move the attachment to the camera
5 press calibrate.
if not calibrated, I press calibration, if not calibrated again, then change the parameters and press calibration again.
What does the program do automatically?
Repeats points 1-5 for me. This is the whole function of this mode. But in this function, point 5 is blocked by the " MachineHome " mode, and I cannot repeat the calibration as many times as necessary for a successful calibration. What are the benefits and need for blocking? In my case, this leads to the uselessness of this mode. Since this leads to unnecessary movements and wasting time on clicks, movements, restarts. But with automation, it's silly not to use it.
It makes no sense to use programs and equipment that should make the task easier.
ma...@makr.zone
Hi Tony
We could create a new calibration setting called
"FirstNozzleUse". It could postpone calibration to the first use
of the nozzle/tip that matters, e.g.
before the first pick or before the first nozzle tip unload.
But I'd like to keep the MachineHome the way it is.
I wrote this logic and my intention was to make the calibration a part of the homing cycle. I have 0.2mm run-out on that nozzle tip holder*, I guess you can see that running the machine that way is a no-go. Before the nozzle is calibrated, the machine is simply not considered homed.
The same applies to visual homing. Only the homing fiducial is
stable on my machine, the Liteplacer has the end-switches mounted
with only one screw plus they are in harms way when a crash
happens, so you can never rely on end-switches on a Liteplacer. So
if visual homing fails, I equally consider the machine unhomed.
Like I wrote earlier, this extended homing cycle is sort of a
pre-flight check for the machine. If it does not work due to
pipeline problems, it is a good thing the machine would not
continue. You then need to solve the pipeline problem before
anything else.
Many things get tested through a successful vision cycle. From basic motion, to light, to camera settling etc. This is also essential for testing during development. It has saved my machine from crashes many times already.
_Mark
*) Yes, I have a replacement nozzle tip holder that I should
mount, but that's beside the point.
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bacrua
ma...@makr.zone
> But why block the ability to fix manually?
First of all, you can't calibrate when the machine is not at
least mechanically and/or visually homed. Otherwise, the Machine
does not yet know how far and which way to move to the bottom
camera.
So to support what you propose, we would have to store multiple states "Mechanically homed", "Visually homed", "Homed and Nozzle tip calibrated", etc. and for each homing related calibration we'd need to add one new state. And then you'd have to start assigning "minimal homing states" to the various user functions. That's becoming very complex for something that is IMHO really not a true problem.
Like I said: Set to Manual. Home. Fix the pipeline. Set to
MachineHome. Problem gone for good.
_Mark
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bacrua
Then just switch modes, the changes took effect immediately after clicking "apply"
james.edwa...@gmail.com
Hi, Mark. I would like to interject a “use case”. I never switch nozzles, I always use a 3cm diameter bellows. When I calibrate the nozzle I set the pipeline to see the brass fitting in the middle and calibrate, and all is OK. But if I want to calibrate the camera, then the nozzle is moved so far away that the camera can’t see the fitting, and the calibration fails. To calibrate the camera I have to switch to a very small nozzle so I can have a pipeline that can calibrate both the nozzle and the camera. It would be good (for me) if there were separate pipelines for calibrating the nozzle step and calibrating the camera step.
By the way your comments about the camera “learning” the shape were very interesting. I could see that would be very useful.
Best, Jim
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tony...@att.net
tony...@att.net
ma...@makr.zone
Hi James
I don't understand why having a separate pipeline will help, if
the brass fitting is not seen by the camera. Can you explain?
Also, calibrating your camera should more or less be a "one-time" thing. It should not be needed routinely, so changing the nozzle tip a few times seems acceptable to me. Or is there something special about your machine that requires frequent recalibration?
@Tony, I agree that the camera calibration belongs into the
camera, but why a new pipeline? Are you using the nozzle tip to
calibrate? If yes, isn't it OK then to reuse the pipeline that this
nozzle tip defines?
_Mark
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tony...@att.net
ma...@makr.zone
> but I know the top camera can't use a nozzle tip for
calibration so it will need its own pipeline.
Just use a fiducial (part), like visual homing. This way we have
all the functionality in place and if that functionality evolves
(which is likely, see the discussion in the group right now), so
will the calibration. The fewer "reinvented wheel" pipelines we
have, the better. ;-)
_Mark
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james.edwa...@gmail.com
The brass fixture is about 1.5cm deep inside the bellows. So when the nozzle is not exactly over the camera the brass fitting is obscured by the bellows rubber of the nozzle. No, there is nothing too special about my machine. I have been changing the optics (like changing the camera-part distance or focal length of the lens and when I do, I have to recalibrate. I agree, it is not a big deal. I actually threw this question out there because I thought I might be missing an already existing feature of Openpnp.
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