Question about Encoder Scale
- tommylight
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24 Apr 2020 10:20 #165365
by tommylight
That seems all good.
Replied by tommylight on topic Question about Encoder Scale
Sorry, i thought PCW is more experienced with this so i did not reply.Hi PCW,
the Voltage between A /A B /A and GND is 300mV or 3.2V.
Between A and A/ or B and B/ is between -2.8 and 2.8V.
Is this correct?! Also, if A /A is 2.8V, b /b is also 2.8V. Didnt B /B need to be -2.8V?
Best regards
Marcel
That seems all good.
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- MATZE-ATZE-SCH
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24 Apr 2020 18:22 #165432
by MATZE-ATZE-SCH
Replied by MATZE-ATZE-SCH on topic Question about Encoder Scale
Hi tommylight,
ok, thank you.
Hmm, I think the next think I try is to reinstall LinuxCNC with a fresh new .hal and .ini . Don´t know what else I can do to try to solve the Problem?
Best regards
Marcel
ok, thank you.
Hmm, I think the next think I try is to reinstall LinuxCNC with a fresh new .hal and .ini . Don´t know what else I can do to try to solve the Problem?
Best regards
Marcel
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24 Apr 2020 18:35 - 24 Apr 2020 18:37 #165437
by PCW
Replied by PCW on topic Question about Encoder Scale
Re-installation is not likely to do anything other than waste time (what would it change?)
If you can move the axis slowly enough it might be valuable to plot the A/B encoder signals in halscope to check for valid quadrature.
( 90 degree phase shift between A and B )
No, with quadrature, A and B can be in any state depending on where you are in the cycle:
If you can move the axis slowly enough it might be valuable to plot the A/B encoder signals in halscope to check for valid quadrature.
( 90 degree phase shift between A and B )
if A /A is 2.8V, b /b is also 2.8V. Didnt B /B need to be -2.8V?
No, with quadrature, A and B can be in any state depending on where you are in the cycle:
A B
0 0 0 degrees
0 1 90 degrees
1 1 180 degrees
1 0 270 degrees
Last edit: 24 Apr 2020 18:37 by PCW.
The following user(s) said Thank You: tommylight
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