×

INDI Library v1.9.6 Released (21 May 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

Meade LX200 Classic Connects But Doesn't Slew

  • Posts: 4
  • Thank you received: 0
Hi there,

I am connected to a Meade LX200 Classic 10" with a USB-to-Serial adapter into the scope's RS-232 port. The scope connects to Ekos but when I try to use manual mount controls, it does not move. Right now, I am just trying to get the mount to move manually, I am not worried about an alignment. I have attached the log file that I gathered.

Is this a setting I am missing?
7 months 2 weeks ago #77633
Attachments:

Please Log in or Create an account to join the conversation.

  • Posts: 4
  • Thank you received: 0
A bit more info:

I am able to talk to the telescope through the RS-232 port by manually sending commands, and can get the telescope to slew successfully there (:Mn# :Qn# etc). The scope does *not* however respond to the ACK command, but all the other commands work. I found this thread  from a year ago where another LX200 scope didn't seem to respond to the ACK command, granted the scope from the thread was not an LX200 Classic like mine.

Any ideas on why Ekos is unable to slew the telescope if I can make it slew through manually-sent serial commands?
 
7 months 1 week ago #77728

Please Log in or Create an account to join the conversation.

  • Posts: 5
  • Thank you received: 0
=16.6pxi had the same Problem with a LX200 compatible mount. it did not move.

the driver sends the command ":SdsDD:MM#"
according to the meade original lx200 docs it should be :SdsDD*MM#

see www.meade.com/support/LX200CommandSet.pdf

problem is in
lx200driver.cpp
int setObjectDEC(int fd, double dec)

regards

 
5 months 4 days ago #79906

Please Log in or Create an account to join the conversation.

This could be a regression, please open a bug report here: github.com/indilib/indi/issues
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
How to Submit Logs when you have problems?
Add your observatory info
5 months 4 days ago #79907

Please Log in or Create an account to join the conversation.

  • Posts: 5
  • Thank you received: 0
i've opened a bug report.
i am new to indi, great work !
Joerg
5 months 4 days ago #79909

Please Log in or Create an account to join the conversation.

  • Posts: 200
  • Thank you received: 39
There are three :Sds command formats specified in the lx200driver.cpp
case LX200_EQ_LONG_FORMAT:
case LX200_EQ_LONGER_FORMAT:
and
case LX200_EQ_SHORT_FORMAT

The first two use the ":", the SHORT uses the "*"

The driver attempts to determine the format by parsing the response to the :GR# command

The response to thr :GR# is
  :GR# Get Telescope RA
   Returns: HH:MM.T# or HH:MM:SS#
   Depending which precision is set for the telescope

If it gets back a "." in byte 5 it attempts to switch to

U - Precision Toggle
  :U# Toggle between low/hi precision positions
  Low - RA displays and messages HH:MM.T sDD*MM
  High - Dec/Az/El displays and messages HH:MM:SS sDD*MM:SS
  Returns Nothing


It will then re-issue the :GR#
If "." found in byte 5 then sets SHORT
Else sets  LX200_EQ_LONG_FORMAT

If you enable logging with telescope driver debug you should see what the response to the :GR# command is, or execute the commands above manually

Gene
 
5 months 4 days ago #79911

Please Log in or Create an account to join the conversation.

  • Posts: 200
  • Thank you received: 39
Sorry, one question please, what firmware version does you scope have?
The latest was 3.34L I believe.

I had owned a circa 2002 classic , and made changes to the lx200 driver a few years ago and had no issues with scope movement, and the given section has not changed in the driver.

Gene
5 months 4 days ago #79912

Please Log in or Create an account to join the conversation.

  • Posts: 5
  • Thank you received: 0
it is a LX200 10" from the mid 90's, firmware is 3.20 or 3.21 (not sure, had to take a look, next time i use it)
maybe newer firmware is more tolerant.

on the other hand i have never seen an original Meade document where ":" is used as a seperator for this command.
where does this ":" come from?

regards
5 months 4 days ago #79913

Please Log in or Create an account to join the conversation.

  • Posts: 5
  • Thank you received: 0
it is a LX200 10" from the mid 90's, firmware is 3.20 or 3.21 (not sure, had to take a look, next time i use it)
maybe newer firmware is more tolerant.

on the other hand i have never seen an original Meade document where ":" is used as a seperator for this command.
where does this ":" come from?

regards
5 months 4 days ago #79914

Please Log in or Create an account to join the conversation.

  • Posts: 5
  • Thank you received: 0
5 months 4 days ago #79918

Please Log in or Create an account to join the conversation.

  • Posts: 91
  • Thank you received: 18
More than two years ago I reported some defective implementations in the lx200 core driver here . I stumbled upon it writing the driver for the AOK Skywalker mount which is hundred percent lx200-compatible. Nobody seemed to be interested then!

I still think the driver needs an overhaul, as there are other commands with the same flaw. May I have hope to reactivate the discussion with this thread ?
AOK Skywalker DDM
Celestron Edge HD 14"
Starlight Trius SX35
Starlight Lodestar X2
Starlight SX Maxi Filterwheel
Focus Boss II Focuser
KStars Ubuntu 20.04 LTS on NUC
Last edit: 5 months 3 days ago by Toni Schriber.
5 months 3 days ago #79929

Please Log in or Create an account to join the conversation.

  • Posts: 77
  • Thank you received: 32
Yup, ping received :-) See brief followup in that other thread
-- Hans
5 months 3 days ago #79963

Please Log in or Create an account to join the conversation.

Time to create page: 0.612 seconds