Stuck on fiducials and missaligment
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Lisandro B
Oct 26, 2016, 1:14:11 PM10/26/16
to OpenPnP
Im stuck with this, surely a missconfiguration, any help greatly apreciated.
I manually set the origin of the board
Just to check, I look that the first fiducial and component (both closest to 0,0) are ok, they are
Then I do a fiducial recognition, but the result is that it moves the origin lower and if I control again the fiducial and component, they also end below
All of this end with some components at the top correctly placed but it "degenerates" as it goes low.
Please see: https://youtu.be/q4b04BaKwWs
I manually set the origin of the board
Just to check, I look that the first fiducial and component (both closest to 0,0) are ok, they are
Then I do a fiducial recognition, but the result is that it moves the origin lower and if I control again the fiducial and component, they also end below
All of this end with some components at the top correctly placed but it "degenerates" as it goes low.
Please see: https://youtu.be/q4b04BaKwWs
Jason von Nieda
Oct 26, 2016, 1:59:58 PM10/26/16
to OpenPnP
Lisandro,
A few things to check:
1. How old is your OpenPnP? There was a pretty major fiducial bug fix done on September 5th that could reflect this error.
2. How do you have your fiducial defined in the package footprint definition? Is it the right size?
3. Consider increasing your camera settle time. I notice that your head bounces a lot after moves, and if is still bouncing when the picture is taken this will throw things off.
Jason
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Lisandro B
Oct 26, 2016, 2:38:23 PM10/26/16
to OpenPnP
1-Latest development
2-Yes, right size, it detects i every time and the "fiducial reticle" fits perfectly
3-I noticed that so I measure the time it takes to stabilize which is approximately a second, its in 1500ms
txs!
2-Yes, right size, it detects i every time and the "fiducial reticle" fits perfectly
3-I noticed that so I measure the time it takes to stabilize which is approximately a second, its in 1500ms
txs!
Lisandro B
Oct 26, 2016, 3:03:02 PM10/26/16
to OpenPnP
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<entry>
<string>Fidu-None</string>
<part-settings enabled="true">
<pipeline>
<stages>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageCapture" name="0" enabled="true" settle-first="true"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="13" enabled="true" prefix="bv_source_" suffix=".png"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.BlurGaussian" name="10" enabled="true" kernel-size="9"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="4" enabled="true" diameter="525"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="1" enabled="true" conversion="Bgr2HsvFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskHsv" name="2" enabled="true" hue-min="60" hue-max="130" saturation-min="0" saturation-max="255" value-min="0" value-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="3" enabled="true" conversion="Hsv2BgrFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="6" enabled="true" conversion="Bgr2Gray"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.Threshold" name="12" enabled="true" threshold="210" auto="false" invert="false"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FindContours" name="5" enabled="true" retrieval-mode="List" approximation-method="None"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FilterContours" name="9" enabled="true" contours-stage-name="5" min-area="50.0" max-area="900000.0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="11" enabled="true" diameter="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawContours" name="7" enabled="true" contours-stage-name="9" thickness="2" index="-1">
<color r="255" g="255" b="255" a="255"/>
</cv-stage>
<cv-stage class="org.openpnp.vision.pipeline.stages.MinAreaRect" name="result" enabled="true" threshold-min="100" threshold-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageRecall" name="14" enabled="true" image-stage-name="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawRotatedRects" name="8" enabled="true" rotated-rects-stage-name="result" thickness="2"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="15" enabled="true" prefix="bv_result_" suffix=".png"/>
</stages>
</pipeline>
</part-settings>
</entry>
<entry>
<string>FidCuadrado</string>
<part-settings enabled="true">
<pipeline>
<stages>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageCapture" name="0" enabled="true" settle-first="true"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="13" enabled="true" prefix="bv_source_" suffix=".png"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.BlurGaussian" name="10" enabled="true" kernel-size="9"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="4" enabled="true" diameter="525"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="1" enabled="true" conversion="Bgr2HsvFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskHsv" name="2" enabled="true" hue-min="60" hue-max="130" saturation-min="0" saturation-max="255" value-min="0" value-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="3" enabled="true" conversion="Hsv2BgrFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="6" enabled="true" conversion="Bgr2Gray"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.Threshold" name="12" enabled="true" threshold="200" auto="false" invert="false"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FindContours" name="5" enabled="true" retrieval-mode="List" approximation-method="None"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FilterContours" name="9" enabled="true" contours-stage-name="5" min-area="50.0" max-area="900000.0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="11" enabled="true" diameter="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawContours" name="7" enabled="true" contours-stage-name="9" thickness="2" index="-1">
<color r="255" g="255" b="255" a="255"/>
</cv-stage>
<cv-stage class="org.openpnp.vision.pipeline.stages.MinAreaRect" name="result" enabled="true" threshold-min="100" threshold-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageRecall" name="14" enabled="true" image-stage-name="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawRotatedRects" name="8" enabled="true" rotated-rects-stage-name="result" thickness="2"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="15" enabled="true" prefix="bv_result_" suffix=".png"/>
</stages>
</pipeline>
</part-settings>
</entry>
<entry>
<string>Fiducial-none</string>
<part-settings enabled="true">
<pipeline>
<stages>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageCapture" name="0" enabled="true" settle-first="true"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="13" enabled="true" prefix="bv_source_" suffix=".png"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.BlurGaussian" name="10" enabled="true" kernel-size="9"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="4" enabled="true" diameter="525"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="1" enabled="true" conversion="Bgr2HsvFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskHsv" name="2" enabled="true" hue-min="60" hue-max="130" saturation-min="0" saturation-max="255" value-min="0" value-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="3" enabled="true" conversion="Hsv2BgrFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="6" enabled="true" conversion="Bgr2Gray"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.Threshold" name="12" enabled="true" threshold="210" auto="false" invert="false"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FindContours" name="5" enabled="true" retrieval-mode="List" approximation-method="None"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FilterContours" name="9" enabled="true" contours-stage-name="5" min-area="50.0" max-area="900000.0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="11" enabled="true" diameter="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawContours" name="7" enabled="true" contours-stage-name="9" thickness="2" index="-1">
<color r="255" g="255" b="255" a="255"/>
</cv-stage>
<cv-stage class="org.openpnp.vision.pipeline.stages.MinAreaRect" name="result" enabled="true" threshold-min="100" threshold-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageRecall" name="14" enabled="true" image-stage-name="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawRotatedRects" name="8" enabled="true" rotated-rects-stage-name="result" thickness="2"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="15" enabled="true" prefix="bv_result_" suffix=".png"/>
</stages>
</pipeline>
</part-settings>
</entry>
<entry>
<string>Fidu80LFracc-None</string>
<part-settings enabled="true">
<pipeline>
<stages>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageCapture" name="0" enabled="true" settle-first="true"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="13" enabled="true" prefix="bv_source_" suffix=".png"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.BlurGaussian" name="10" enabled="true" kernel-size="9"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="4" enabled="true" diameter="525"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="1" enabled="true" conversion="Bgr2HsvFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskHsv" name="2" enabled="true" hue-min="60" hue-max="130" saturation-min="0" saturation-max="255" value-min="0" value-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="3" enabled="true" conversion="Hsv2BgrFull"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ConvertColor" name="6" enabled="true" conversion="Bgr2Gray"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.Threshold" name="12" enabled="true" threshold="210" auto="false" invert="false"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FindContours" name="5" enabled="true" retrieval-mode="List" approximation-method="None"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.FilterContours" name="9" enabled="true" contours-stage-name="5" min-area="50.0" max-area="900000.0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.MaskCircle" name="11" enabled="true" diameter="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawContours" name="7" enabled="true" contours-stage-name="9" thickness="2" index="-1">
<color r="255" g="255" b="255" a="255"/>
</cv-stage>
<cv-stage class="org.openpnp.vision.pipeline.stages.MinAreaRect" name="result" enabled="true" threshold-min="100" threshold-max="255"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageRecall" name="14" enabled="true" image-stage-name="0"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.DrawRotatedRects" name="8" enabled="true" rotated-rects-stage-name="result" thickness="2"/>
<cv-stage class="org.openpnp.vision.pipeline.stages.ImageWriteDebug" name="15" enabled="true" prefix="bv_result_" suffix=".png"/>
</stages>
</pipeline>
</part-settings>
</entry>
</part-settings-by-part-id>
</part-alignment>
<fiducial-locator class="org.openpnp.machine.reference.vision.ReferenceFiducialLocator"/>
</machine>
</openpnp-machine>Jason von Nieda
Oct 26, 2016, 3:15:10 PM10/26/16
to OpenPnP
Hi Lisandro,
That's all the comes to mind immediately. I will have more time tonight or tomorrow night to take a closer look and see if I can figure something out.
Have you, by chance, tried any other boards? It would be interesting to know if this behavior happens on every board or just that one. And by board I mean board design, not just a different copy of the same board.
Jason
Lisandro B
Oct 26, 2016, 5:00:40 PM10/26/16
to OpenPnP
Jason, thank you very much as allways.
Yes, im making several of that design and also another with a lot more leds in it, same behavior.
Tried to measure the board with the DRO and joging the camera to check if the size of the board is the same of the machine and it is, so I can discard that "steps per mm" are the same
Yes, im making several of that design and also another with a lot more leds in it, same behavior.
Tried to measure the board with the DRO and joging the camera to check if the size of the board is the same of the machine and it is, so I can discard that "steps per mm" are the same
mojalovaa1
Oct 26, 2016, 5:49:23 PM10/26/16
to OpenPnP
If I m see correct when you are press with mouse that go to pcb zero position you are bee with cross under real pcb zero position , that look me like that you are not calibrate camera correct or you have big lens distortion .
Jason von Nieda
Oct 27, 2016, 8:42:11 PM10/27/16
to OpenPnP
Hi Lisando,
After having a closer look, I think you have a steps per mm problem on, at least, your X axis. Probably Y too. It looks like your steps per mm setting (in your motion controller) is set slightly too high.
I suggest you get a ruler of at least 100mm and check to make sure that when you tell your machine to move 100mm, it moves 100mm. You can do this by laying a ruler on the bed, moving the camera above one line and then jogging left or right by 100mm. I think you will find it's actually jogging more like 101 or 102mm. You can adjust your steps per mm to fix this.
Jason
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Jason von Nieda
Oct 27, 2016, 8:56:26 PM10/27/16
to OpenPnP
I have added a new Wiki page for configuring steps per mm: https://github.com/openpnp/openpnp/wiki/Setup-and-Calibration%3A-Steps-Per-Mm
Jason
Lisandro B
Oct 28, 2016, 6:33:32 PM10/28/16
to OpenPnP
I remember to have done that measurement with a metal ruler, but to be honest, that was on the first machine: This one uses the same parts from the older one, except that the rods are longer and so the belt.
Will do it again and let you know the results
as allways, I REALLY APRECIATE YOUR HELP!!!!!
Will do it again and let you know the results
as allways, I REALLY APRECIATE YOUR HELP!!!!!
Jason von Nieda
Oct 28, 2016, 6:57:43 PM10/28/16
to OpenPnP
Sounds good, hope it helps!
Jason
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mojalovaa1
Nov 3, 2016, 6:14:09 PM11/3/16
to OpenPnP
Lisandro , you are solve problems?
On my old machine all so sometimes have same problems , after run auto fiducial detection sometimes position is not ok , I m think that is step/mm but is not I m make calibration , all so camera is calibrated .
For me is strange because after fiducial detection all time change pcb rotation position , but pcb is not moved .
On my old machine all so sometimes have same problems , after run auto fiducial detection sometimes position is not ok , I m think that is step/mm but is not I m make calibration , all so camera is calibrated .
For me is strange because after fiducial detection all time change pcb rotation position , but pcb is not moved .
Jason von Nieda
Nov 3, 2016, 7:48:52 PM11/3/16
to OpenPnP
Moja,
There was a big bug in fiducial detection that was solved on September 5th. This might have been the cause for the problems you saw. More info here: https://github.com/openpnp/openpnp/commit/f64bde6c9bce37b43a89fde2c21315657885e372
Jason
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mojalovaa1
Nov 5, 2016, 6:28:51 AM11/5/16
to OpenPnP
Jason , I m run yours official version and all so have same problems , have you idea what can fake me ?
Have same problems like Lisandro but on right down side for x 0.2 mm and for y 0.4 mm .
I m set step/mm and measure with micrometer .
All so set px/mm (use paper with cube 5x5 mm )
All so set px/mm (use paper with cube 5x5 mm )
Have same problems like Lisandro but on right down side for x 0.2 mm and for y 0.4 mm .
Cri S
Nov 5, 2016, 9:07:09 AM11/5/16
to OpenPnP
Tray put the board a bit angled and offset inside machine. Record board zero and angle( should be zero) . on every attempt resets the board zero values before testing it.
Check board if auto fiducials work.
Test that you have max offset and at least 1 or 2 degree of angle.
Fiducial code into auto placement and on GUI button works slightly different.
If problem sussist publish board coordinates before and after fiducial recognition, coordinates of fiducial on placement and real coordinates of fiducial center captured with find circle script. I attach a copy of the script, you must remove .txt and actually its configured for 1-2mm fiducials. If different you must change it. Include two components, corrected and placements coordinates near fiducials in the report.
To get the corrected coordinate out, capture camera pos.
I hope both have deactivated nozzle offset correction as this actually depredicate camera for taking out any measurement.
Check board if auto fiducials work.
Test that you have max offset and at least 1 or 2 degree of angle.
Fiducial code into auto placement and on GUI button works slightly different.
If problem sussist publish board coordinates before and after fiducial recognition, coordinates of fiducial on placement and real coordinates of fiducial center captured with find circle script. I attach a copy of the script, you must remove .txt and actually its configured for 1-2mm fiducials. If different you must change it. Include two components, corrected and placements coordinates near fiducials in the report.
To get the corrected coordinate out, capture camera pos.
I hope both have deactivated nozzle offset correction as this actually depredicate camera for taking out any measurement.
Jason von Nieda
Nov 5, 2016, 11:02:55 AM11/5/16
to ope...@googlegroups.com
Moja,
Using a micrometer for setting steps per mm is not recommended. You need to be able to measure the error across a longer rage. I recommend using at least a 100mm ruler. See this: https://github.com/openpnp/openpnp/wiki/Setup-and-Calibration:-Steps-Per-Mm
In every case where people have had errors like this it has been due to steps per mm, so I would focus on that first.
Jason
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mojalovaa1
Nov 5, 2016, 2:26:12 PM11/5/16
to OpenPnP
I m measure distance on pcb , calculate distance on coordinate and measure distance with camera and result is confused .
First need say that I m check step/mm and that is ok .
First need say that I m check step/mm and that is ok .
distance between LED 13 and LED 16 on real on pcb is 120 mm
distance on coordinate calculation is 119.970 mm
distance on coordinate calculation is 119.970 mm
distance measured with camera and machine move manual is 119.570 mm
That is for X axis .
distance between LED 9 and LED 12 is 120 mm on real pcb .
distance on coordinate calculation is 120.02 mm
distance on coordinate calculation is 120.02 mm
distance measured with camera and machine move manual is 120.220 mm
That is for Y axis
I m test all so move with ruler and look OK .
Have you idea what can be ?
mojalovaa1
Nov 5, 2016, 2:29:42 PM11/5/16
to OpenPnP
Jason von Nieda
Nov 5, 2016, 2:57:39 PM11/5/16
to ope...@googlegroups.com
Moja,
You said you checked step/mm, can you describe how you checked it? If you aren't checking it over 100-200mm you aren't going to get good results. The biggest source of these types of error is incorrect steps/mm.
This part of the software is extremely simple, and there is very little that can go wrong. It's just sending simple Gcode to your controller that says "Go to X,Y". It's up to your controller to go to that position. OpenPnP really doesn't have much to do with it.
There are three things that can account for the problem you are seeing:
1. Something wrong with OpenPnP.
2. Something wrong with controller setup.
3. Something wrong with hardware.
To rule out #1, try sending the same commands from Pronterface. Line up the fid and then send a G0 to Pronterface. If you see the same error it's not a problem with OpenPnP.
#2, as I said, is almost always steps/mm. If you can't reliably move 100mm in each axis then nothing is going to work right. I actually tune my machine at 300mm and across 300mm I am less than .1mm off.
Another thing to check is your acceleration settings. If you are accelerating too fast you might be losing steps.
#3 could be belt tension, backlash, slipping pulleys, not enough current on motors, etc.
Whenever I am trying to diagnose a problem like this I always work to remove as many variables as I can. Remove OpenPnP from the equation. Try with Pronterface or just a serial terminal. Then you know that OpenPnP is not the problem. Then you can move on to the next step.
Jason
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mojalovaa1
Nov 5, 2016, 4:59:32 PM11/5/16
to OpenPnP
Thanks Jason
Problem is be step/mm , I m use plastic school ruler and that is problems , then I m use master meter tape ( if that name is correct on english like this http://all-free-download.com/free-vector/download/tape-measure_312620.html ) , now is more better but is not 100% perfect , I can say maybe 98% , for calibration need use calibrated ruler but I not have it , all so can help if you measure long distance , for X axis I m use now 300 mm and for Y 200 mm .
Cri S
Nov 5, 2016, 5:18:22 PM11/5/16
to ope...@googlegroups.com
A4 or letter size paper is pretty accurate.
If after checking lower and left size edge for x and y and upper right angle is wrong, there is probably mechanic angle accuracy problem.
Mechanical caliper are really good for accuracy checking with camera.
Il 05/nov/2016 21:59 "mojalovaa1" <moja...@gmail.com> ha scritto:
Thanks JasonProblem is be step/mm , I m use plastic school ruler and that is problems , then I m use master meter tape ( if that name is correct on english like this http://all-free-download.com/free-vector/download/tape-measure_312620.html ) , now is more better but is not 100% perfect , I can say maybe 98% , for calibration need use calibrated ruler but I not have it , all so can help if you measure long distance , for X axis I m use now 300 mm and for Y 200 mm .
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Jason von Nieda
Nov 5, 2016, 5:19:16 PM11/5/16
to OpenPnP
Hi Moja, glad to hear you worked it out! Good luck with your calibration. Sounds like you are getting very close.
Jason
On Sat, Nov 5, 2016 at 3:59 PM mojalovaa1 <moja...@gmail.com> wrote:
Thanks JasonProblem is be step/mm , I m use plastic school ruler and that is problems , then I m use master meter tape ( if that name is correct on english like this http://all-free-download.com/free-vector/download/tape-measure_312620.html ) , now is more better but is not 100% perfect , I can say maybe 98% , for calibration need use calibrated ruler but I not have it , all so can help if you measure long distance , for X axis I m use now 300 mm and for Y 200 mm .
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mojalovaa1
Nov 5, 2016, 6:40:56 PM11/5/16
to OpenPnP
I m test all so boot vision in work , and work solid with TQFP32 package , but on my version openpnp ( because have set all actuators and other staff that Cri.s is make to my machine ) , and when will have more free time all so will try finish machine file for official version OpenPnP .
My suggestion is that think add my GRBL driver on official version , only need make some change that will be supported , but you know what is possible and what is not .
My suggestion is that think add my GRBL driver on official version , only need make some change that will be supported , but you know what is possible and what is not .
Jason von Nieda
Nov 5, 2016, 7:27:19 PM11/5/16
to OpenPnP
Hi Moja,
If you want to add this driver to the official code it needs to meet the coding standards in https://github.com/openpnp/openpnp/wiki/Developers-Guide#contributing. It also needs to be documented and updated to make all of the hardcoded and "magic" numbers configurable. This is the case for any code that gets merged into the codebase.
The GcodeDriver does nearly everything this driver does and it does it in a configurable, flexible and documented fashion. I would prefer to spend my time improving the GcodeDriver, which benefits everyone, than updating the GrblDriver which is no longer in wide use.
Jason
On Sat, Nov 5, 2016 at 5:40 PM mojalovaa1 <moja...@gmail.com> wrote:
I m test all so boot vision in work , and work solid with TQFP32 package , but on my version openpnp ( because have set all actuators and other staff that Cri.s is make to my machine ) , and when will have more free time all so will try finish machine file for official version OpenPnP .
My suggestion is that think add my GRBL driver on official version , only need make some change that will be supported , but you know what is possible and what is not .
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mojalovaa1
Nov 12, 2016, 9:49:42 AM11/12/16
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Jason , can you please look this my video and say what can be problems , like I m say before this is the best what I can set with step/mm , all so I m try change camera angle and have some difference but the best is this on video ?
evilwulfie
Nov 12, 2016, 10:06:50 AM11/12/16
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I am curious, have you greased up your
rails really well ?
I have noticed that they work much smoother when greased.
I have noticed that they work much smoother when greased.
On 11/12/2016 7:49 AM, mojalovaa1 wrote:
Jason , can you please look this my video and say what can be problems , like I m say before this is the best what I can set with step/mm , all so I m try change camera angle and have some difference but the best is this on video ?
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mojalovaa1
Nov 12, 2016, 10:10:25 AM11/12/16
to OpenPnP
Work very well , only problem can be if pulley is not bore in center , I m buy it on ebay before but can not say that is something high quality produced ?
Jason von Nieda
Nov 12, 2016, 10:15:01 AM11/12/16
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Moja,
Sorry to say, but this still looks like a steps/mm issue. Two things to try:
1. Manually align to the board corner and then try going to the two fids using the buttons in the placement panel. Does it work better?
2. Record a video showing your steps/mm tests. 100mm or greater ruler and move 100mm at a time. Does it land on the lines well?
Unfortunately, if you don't have steps/mm dialed in there is nothing that can be done. That is the fundamental requirement for any CNC machine to do useful work.
Jason
On Sat, Nov 12, 2016 at 8:49 AM mojalovaa1 <moja...@gmail.com> wrote:
Jason , can you please look this my video and say what can be problems , like I m say before this is the best what I can set with step/mm , all so I m try change camera angle and have some difference but the best is this on video ?
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mojalovaa1
Nov 12, 2016, 1:20:39 PM11/12/16
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Hi Jason
I m try all but same all time , fist I m again set stepp/mm , difference is be 0.003 step per mm that is not something disaster , then I m change acceleration but same , then I m change max speed from 20 000 mm/min to 2000 mm / min and same again .
Think that need be some mechanical problems but can not found what is , have you idea what can be , belt is ok with tension only if some one tooth is not damaged , pulley look ok , maybe hole is not on perfect center but look ok ?
Rails is cleaned and oiled and angularity is ok .
I m try all but same all time , fist I m again set stepp/mm , difference is be 0.003 step per mm that is not something disaster , then I m change acceleration but same , then I m change max speed from 20 000 mm/min to 2000 mm / min and same again .
Think that need be some mechanical problems but can not found what is , have you idea what can be , belt is ok with tension only if some one tooth is not damaged , pulley look ok , maybe hole is not on perfect center but look ok ?
Rails is cleaned and oiled and angularity is ok .
Jason von Nieda
Nov 12, 2016, 1:34:45 PM11/12/16
to OpenPnP
Moja,
Pick a spot and move camera to it. Then jog 100mm away in X-, X+, Y-, Y+ each time going back by the same amount. Does it return to the same spot every time? If not, you may have backlash or belt tension problems.
Maybe someone wants to write up a "Troubleshooting Mechanical Problems" wiki? I don't have time today, but if someone wants to do that it would be very helpful. It could cover belt tensioning, backlash, acceleration and speed, etc.
Jason
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Trampas Stern
Nov 12, 2016, 5:01:28 PM11/12/16
to OpenPnP
I had a shapeoko mill and to calibrate and test mechanical accuracy I made a PCB fiducials and then used OpenCV and a python script to find the points. This allowed me to check for missed steps, back lash, calibration, etc.
I found that the backlash in the machine was really bad and caused me great pains as it was not consistent. For my PNP I using hiwin rails in hopes it works better.
I do have a few more of these PCBs if anyone is interested in them.
Trampas
mojalovaa1
Nov 12, 2016, 5:11:06 PM11/12/16
to OpenPnP
I m repair one part , belt on Y axis is be damaged , fibers in belt is damaged , now I m change that belt and on Y axis is ok , only on X axis have little deviation ( 0.1 mm max , min is 0.03 mm ) , belt torsion is ok , belt look fine , stepper not lose step , tomorrow will try found problems .
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