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[Solved] funny looking scannings result  

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thler
(@thler)
Active Member

Hi...
i get funny results when scanning, any idears why?

pias1
pias

 🙂

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Posted : 28/02/2020 5:29 pm
Danilo0702
(@danilo0702)
Estimable Member

my tip ... calibrate really well and then use glue for the lasers. My camera was not at the right angle.

 

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Posted : 28/02/2020 6:02 pm
thler liked
mario
(@mario)
Member Admin

My tip. Your motor is doing two turns. If you are using the silent step stick motor driver which is delivered with the kit I will bet you are using a motor with 200 steps and your configuration is set for a motor with 400 steps. Have a look into the config and check the motor steps value. By default it points to 6400 steps. In case of a 200 step motor change this value to 3200 steps. 

If you are not using a silent step stick motor driver, e.g. something like a4988 or similar. You need to bridge some connectors on your HAT to get 1/16 step resolution. And additionally check the value for the motor.

Bildschirmfoto 2020 01 09 um 09.22.46 (3)

I will add this bridging part for a4988 and similar drivers to the documentation. It depends on the driver whether you connect to GND or 5V. You can find further information on this topic: https://fabscan.org/community/f-a-q/configuration-for-400-step-motor/paged/2/

Anyway you definetly need to recalibrate your scanner after changing the config.

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Posted : 28/02/2020 7:55 pm
thler liked
thler
(@thler)
Active Member

@mario Tank you for your idea for a solution, I started by checking the software, and you were right, it was set to 6400 steps, I changed it to 3200 steps, calibrated the scanner and the issue was fixed.. 💪😀

 

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Posted : 08/03/2020 9:41 am
mario
(@mario)
Member Admin

Glad to hear. So i will mark this as solved. 

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Posted : 10/03/2020 6:09 pm
thler
(@thler)
Active Member

So far so good 😊 

i have bin looking for others with my next issue, but dident seam to find any..

when i scan, the result seams to be mirrored try to look at the text om my scanned object. Is there a solution to that issue?

pias mirror

 Great scan thow 😉 

This post was modified 2 weeks ago by thler
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Posted : 16/03/2020 12:18 pm
moop
 moop
(@moop)
Active Member

what direction is the turntable rotating durring the scan? Should be CW. If CCW, you might have the stepper motor connections inverted.

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Posted : 18/03/2020 6:33 pm
Danilo0702
(@danilo0702)
Estimable Member
Posted by: @moop

what direction is the turntable rotating durring the scan? Should be CW. If CCW, you might have the stepper motor connections inverted.

in Clock direction

 

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Posted : 18/03/2020 6:59 pm
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