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INDI Library v1.9.0 Released (23 Apr 2021)

Major INDI Library release v1.9.0 bring significant internal changes championed by @pawel-soja to modernize core INDI Library drivers and clients. New drivers for DeepSkyDad Flat Panel & Pegasus devices plus further improvements to PCM8 drivers.

RST-135 mount - what are the best practices?

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I am about to pull the trigger and buy an RST-135.
What are the best practices to use it with SM/KStars/Ekos?
I know, there's a mega thread about it on CN but maybe here I could get some coherent advice.
Thanks!
 
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 2 weeks ago #69560

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I can't tell about any best practices as I don't have the mount.  I love the tiny size and light weight of that mount and big carrying capacity but am unsure about the backdriving issue.  I would like to image unattended, at least some of the time and I'm sure I couldn't sleep, worrying about it, so I'm holding off.. I'm looking at a couple of other mounts too but I keep coming back to the rainbow.  I didn't read the whole thread on CN, was there any talk about a brake for the 135 like they have on the 300 model?
-Brian

NanoPC-T4 - Armbian focal
iOptron CEM25P mount
Photoline 80mm triplet refractor
ZWO ASI294MC Pro Imaging camera
ZWO ASI290MM mini Guide camera
ZWO ASI EAF focuser

1 month 1 week ago #69756

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multi-star guiding, 0.5 s guide camera exposures
Kstars/ekos mac running stellarmate remote
RST-135
Redcat 51, Borg 107FL, AT130EDT
Canon EOS R
The following user(s) said Thank You: maxthebuilder
1 month 1 week ago #69769

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Do I need to use the hand controller at all if I use Ekos and don't need GPS?
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 1 week ago #69772

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I only use the hand controller to do the initial home and set the time and location from the gps. I am not sure you can home it to the microswitches without the hand controller and haven’t confirmed you can set time and location from indi. Certainly you could unplug the controller after initializing.
Kstars/ekos mac running stellarmate remote
RST-135
Redcat 51, Borg 107FL, AT130EDT
Canon EOS R
1 month 1 week ago #69781

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I got it today!

Connected to Stellarmate to test with the CCD Simulator.
Hand-controller is not connected.

Slewing to targets seem to go in right directions.
BUT

I tried to perform Polar Alignment - it was scary!
Slewed to Polaris and started the procedure.
Instead of going 30dgrs it went full 360 and wanted to go further but I stopped it.
I pressed Park (which I set to 0,270) - it went 360 in the other direction and parked successfully.

Location/date/time is set correctly in KStars

What could be wrong?
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
Last edit: 1 month 5 days ago by maxthebuilder.
1 month 5 days ago #69980

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OK. Figured this one out.

The hand-controller has to be connected to provide coordinates/date/time to Ekos.

Once I connected the HC, selected "Mount updates KStars", PA procedure went as it should
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 5 days ago #69981

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Now, the confusion starts.

- is it enough to connect the HC just once for a certain location to sync the GPS data?
- or I need to do this every session?
- is it save to disconnect the HC after GPS sync and proceed with Ekos?
- my concern is the Meridian Flip - if the HC is connected it will interfere with Ekos.

What is the workflow? Anyone?
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 5 days ago #69982

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OK.
Looks like I figured this mount out.
I am testing it outside for guiding right now.

Performed the PA routine. It worked nicely.
Control knobs of the mount are very smooth.

Guiding is good at around 1" RMS total (0.5 sec interval) with occasional RA runaways.
I had to adjust Min/Max parameters quite a bit (from what I am used to with HEQ5) for guiding to work.
Internal guider.

Can someone please share good Control Parameters for the Internal Guider?
Will be much appreciated!
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 3 days ago #70081

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Running it outside with everything attached.
Will have the flip in 15 min.

Guiding is good - below 1" RMS but even after tweaking I still have RA runaways every 1-3 minutes.
Those are just spikes which settle in 10-30 sec.
I guess it's OK but if someone knows how to get rid of them - please let me know.

For guiding I settled at:
Min/Max RA 120/12
Min/Max DEC 1000/12
0.5s guiding interval.
Internal guider.

Thanks!
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
Last edit: 1 month 1 day ago by maxthebuilder.
1 month 1 day ago #70135

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The flip didn't go well.
It went under horizon.
When I parked after that - the position was off by 90dgrs in RA.
I guess, I had to have "simulate pier side" option enabled (without it the pier side was "unknown').
Next time I'll see if it helps.
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
1 month 1 day ago #70138

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  • Posts: 527
  • Thank you received: 53
Also, after the flip, the DEC guiding became worse (still good at around 1") but RA spikes disappeared.
Max S.

RPI 4 B (4Gb) with SMate
Nikon D5500 H-a modified. Nikon D5500 stock
AT72EDII, TPO RC6
ASI2600MC Pro
ZWO ASI120MM Mini on ZWO 30F4
ZWO ASI224MC-S on Orion 50 mm f/3.2
ZWO EAF x 2
SW AZ-GTi
SW HEQ5
RST-135
Last edit: 1 month 1 day ago by maxthebuilder.
1 month 1 day ago #70139

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