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Post by hexpod on Feb 27, 2015 8:56:38 GMT
Hi guys,
Could you please share your experience with sensors.
What kind of type is the most suitable for the application?
Do you think this model could do the job?
uk.rs-online.com/web/p/products/7736762/
Thanks a lot!
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Post by hexpod on Feb 28, 2015 1:10:08 GMT
Hi guys,
Could you please share your experience with sensors.
What kind of type is the most suitable for the application?
Do you think this model could do the job?
uk.rs-online.com/web/p/products/7736762/
Thanks a lot!
Hi again,
I was just curious if the link above in not pointing to the blue sensor on that photo? 
Also, what is the difference between black and blue one?
Cheers - Ignacy
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Post by tronicgr on Feb 28, 2015 1:20:04 GMT
Hi Ignacy
The blue one is 10-turn , the black ones half turn (180 degrees)
Thanks
Thanos
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Post by hexpod on Feb 28, 2015 2:18:49 GMT
Hi Thanos,
it seems like a big difference. which one is better? I am sure you've tested both of them :-)
cheers - I.
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Post by hexpod on Feb 28, 2015 12:55:00 GMT
Hi Thanos, it seems like a big difference. which one is better? I am sure you've tested both of them :-) cheers - I. In the 10 tour model, (blue one) 12 bit resolution seems to be split over 3600 deg. is this enough? I also found this model (12bit/360 deg.) but it's not multiturn: www.mouser.de/ds/2/54/AMS22B-242220.pdfI have to admit I am confused. I don't know which one to order. cheers - I. |
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Post by tronicgr on Mar 2, 2015 19:43:09 GMT
Hi Thanos, it seems like a big difference. which one is better? I am sure you've tested both of them :-) cheers - I. In the 10 tour model, (blue one) 12 bit resolution seems to be split over 3600 deg. is this enough? I also found this model (12bit/360 deg.) but it's not multiturn: www.mouser.de/ds/2/54/AMS22B-242220.pdfI have to admit I am confused. I don't know which one to order. cheers - I. Hi Ignacy, Sorry for the delay, not very often online lately. Yes, you can use the AMS22B sensors. They are 360 degrees sensors and since you need your motors to rotate 180 degrees, you can use a small pulley with 2:1 ratio. See here a good example of how this can be done. Also I have made a special menu for the clearpath motors. You should use the mode "2" as in the below photo. www.dropbox.com/s/iynfw3gpge44nji/IMG_20150302_111617_038.jpg?dl=0Reset the AMC1280USB after you save the setting, as the change of base frequency for the PWM cannot be performed instantly. Other setting you may need to do are to set the Max motor speed to less than 95% as otherwise the clearpath thinks there is an error and disables the motor. In the Clearpath tool, make sure you are using Velocity mode, and start with small acceleration and speed settings for the motor, to get familiar with the effect that PID has on your actuators first. From experimenting on my motor with no gearing, I found that the positioning is stable under 200RPM and acceleration of 600 max. With gearing you can set it much higher. Thanks Thanos |
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Post by paulg100 on Aug 4, 2016 10:31:15 GMT
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Post by tronicgr on Aug 4, 2016 12:11:09 GMT
Essentially it's the same thing. The magnetic contact less sensors from BI-TECHNOLOGIES are non contact as well, but you need a hub and axle to drive the magnet position. The sensor above does not include this. Thanks Thanos |
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Post by paulg100 on Aug 4, 2016 12:41:20 GMT
it talks about an airgap of up to 4mm. I was thinking you could fix the magnet on the end of the motor shaft and place the sensor just in front of the magnet.
there by doing away with the mechanical connection (ie the coupled shaft)
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Post by tronicgr on Aug 4, 2016 15:47:05 GMT
it talks about an airgap of up to 4mm. I was thinking you could fix the magnet on the end of the motor shaft and place the sensor just in front of the magnet. there by doing away with the mechanical connection (ie the coupled shaft) There is a gap inside the BI-TECHNOLOGIES sensors as well... You will have to make sure you have fixed distance and proper alignment to have linear data results. Do these sensors output 180 degrees measurements? I seen in the manual about 360 degrees and 63 degrees if I remember correctly. Thanks Thanos |
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Post by paulg100 on Aug 4, 2016 18:52:43 GMT
yes they do 180 and 360 I think. I havnt looked into it very much. Just thought it might be a more reliable solution than coupling a shaft. They are not that expensive maybe ill order one to have a play with. In the mean time ill keep saving for some optical encoders  |
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