Maximum encoder speed?

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06 Feb 2018 09:20 #105482 by vadoch
Hello. First of all, sorry for my not good English

Recently I maked and installed rotary sensor with 80 positions (80 holes with a diameter of 2.5 mm)



The encoder has those parameters:
Datasheet www.mouser.com/ds/2/307/EE_SX138_1010-8837.pdf

My problem is that it can not measure more than 200 revolutions, and I do not know why this happens.
I connected the sensor in parallel to the index and phaseA, and set in the settings of 80 cycles per revolution. Maybe it's because I do not have a separate index sensor?
In what else could be the reason in your opinion? Any ideas are welcome

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06 Feb 2018 13:03 #105486 by PCW
Replied by PCW on topic Maximum encoder speed?
I would take a look at the "A" signal with halscope to debug this

You do need a separate index signal for threading and tapping

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06 Feb 2018 17:17 #105498 by Mike_Eitel
Replied by Mike_Eitel on topic Maximum encoder speed?
Sometimes optocoppler are not very fast.

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07 Feb 2018 02:07 #105516 by tommylight
Replied by tommylight on topic Maximum encoder speed?
And that type of sensor has to be fully covered.

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07 Feb 2018 09:47 - 26 Jul 2019 08:52 #105521 by verticalperformance
I'm using a similar disk, with 60 slots and it works fine up to 3000RPM (max of my spindle) thru the parport.
The only issue I had was that I made it from blue acyrilic, which seemed to be transparent to infra red. Spray of black paint fixed it. The other sensor you can see is the standard sherline sensor, which I'm using for the index pulse (the white tape on the disk!)


Sensor is exposed as seen in pic. Datasheet attached.
https://au.rs-online.com/web/p/slotted-optical-switches/0304560/?sra=pstk
Attachments:
Last edit: 26 Jul 2019 08:52 by verticalperformance.

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23 Jul 2019 15:53 - 23 Jul 2019 15:55 #140304 by Dinuka_Shehan
Last edit: 23 Jul 2019 15:55 by Dinuka_Shehan.

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23 Jul 2019 15:57 #140305 by Dinuka_Shehan
How to look hal scope?

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23 Jul 2019 16:10 #140311 by tommylight
Replied by tommylight on topic Maximum encoder speed?
File>hal scope>ok>click on one of the numbers at the bottom left>scroll to chose what you want to monitor>press roll and auto at the top right side of the screen> magic! :)
The following user(s) said Thank You: Dinuka_Shehan

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