MD-01 SPID_ROT2PROG: changing motor parameters in cmd

[Glenn Morris]

Hello Hamlib community,

I am working on a MD-01 SPID rotator. I tried changing the motor parameters in command line - for example setting the minimum acceptable azimuth value to 160. Hence I ran
rotctl -m 903 -r /dev/ttyUSB0 -s 115200 -C min_az=160 -L
The -L returns the rot parameters, among which
min_az : "Minimum rotator azimuth in degrees"
default: -180, Value:160
which shows that the change is effective. However, I subsequently asked a move that went below the minimal value I had previously set. Furthermore, in my MD-01 settings the minimum azimuth value hasn't been modified (as shown on the MD-01 display). So it looks like the communication between the command line using the Hamlib librairy and my MD-01 doesn't handle this kind of settings changes. Does anybody have an idea on how to overcome the issue ?

Thanks,
Glenn

[Michael Black]

The limit only works for set_position.If you want to limit the move command you need to poll for position and stop it yourself since move has no azimuth or elevation argument.
Mike W9MDB

On Tuesday, May 28, 2024 at 04:19:00 PM CDT, Glenn Morris <glennmorris@users.sourceforge.net> wrote:

Hello Hamlib community,

I am working on a MD-01 SPID rotator. I tried changing the motor parameters in command line - for example setting the minimum acceptable azimuth value to 160. Hence I ran
rotctl -m 903 -r /dev/ttyUSB0 -s 115200 -C min_az=160 -L
The -L returns the rot parameters, among which
min_az : "Minimum rotator azimuth in degrees"
default: -180, Value:160
which shows that the change is effective. However, I subsequently asked a move that went below the minimal value I had previously set. Furthermore, in my MD-01 settings the minimum azimuth value hasn't been modified (as shown on the MD-01 display). So it looks like the communication between the command line using the Hamlib librairy and my MD-01 doesn't handle this kind of settings changes. Does anybody have an idea on how to overcome the issue ?

Thanks,
Glenn

MD-01 SPID_ROT2PROG: changing motor parameters in cmd

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[Glenn Morris]

Thank you for your answer. Here are a few points I noticed :
- It is true that the limit I set in command line works for the position (P command), and not for the move.
- However, the limit which is previously set directly on the hardware MD-01 works for both P and M instructions in command line. Hence the problem lies in the way hardware settings can be changed through command line. Do you have an idea why my -C min_az=160 instruction does not apply onto the hardware ? How would you proceed to change the MD-01 settings via the Hamlib librairy ?
Thank you again for your responsiveness, Glenn

[Michael Black]

I have no documentation that shows how to set the limit in the controller.That could be added if there's documentation to support it.