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 1 
 on: August 14, 2019, 22:00:05 
Started by mramirez - Last post by TCWORLD
Hi Mateo,

Glad the comms problem is sorted.

If the current is too low, or if it is too high, it can cause a loss of steps.
I would drop the current limit down to ~1.2A, which should allow the driver to operate more efficiently.

I would also make sure your mount is well balanced - if the weights aren't balanced the motors can struggle to turn the mount.

If that doesn't help, try lowering the goto speed to see if you can find a point where it doesn't skip steps.

Kind Regards,
Tom.

 2 
 on: August 14, 2019, 00:57:57 
Started by mramirez - Last post by mramirez
Hi Tom.
I am sorry, I have been traveling and I have not the chance to do anything with the AstroEQ until now.
The problem with the com port seams to be solved. I really don’t know how.
I tried to run the configure task again, and this time the board kept the connection for about 3 minutes, then the com port were lost.
Then I realized that I had to run first the “Update Firmware” before running the “configure”.
After running the  “Update Firmware”, the com port remains on. Then I ran the “configure”, charging the “EQ5-Custom-Pulley.conf” config file. Is this the right one?
Now, when I opened the “Cartes du Ciel”, I can connect with the Telescope (via your AstroEQ), and I can move the Telescope and do some kind of Goto.
Now I am having the problem that I miss some steps in RA, so that, the goto is not precise enough.
I have the EQ5 Skywhatcher mount, and I have bought the NEMA 14 stepper motors, and pulleys and belts you mentioned in this web side.
The torque in AR motor seams that it is not enough. According with your experience, which is the current that should be applied to the motors? I have tried with 1.5A in RA.
On the other hand, do I have to upload the config file every time I turn on the board?
Thanks Tom
Kind regards
Mateo

 3 
 on: August 13, 2019, 15:36:56 
Started by khobar - Last post by khobar
Finally, the clouds went away and I got my first chance to try out my DIY AstroEQ on real targets. I used my "light" ES80 80mm APO w/Nikon D5300.

PA: Sharpcap Pro 3.2
Guiding: ASI120mm and PHD2
Image capture: Nikon D5300 via BackYardNikon
Mount: LX70 w/AstroEQ EQMOD Stellarium


I had some issues with GOTO's. Initial GOTO the moon was pretty accurate, but M31 was not. I believe this is my unfamiliarity with EQMOD.

Guiding was interesting once I figured out EQMOD RA and DEC guide rates. Once the mount settled it seemed to guide okay especially since I discovered the DEC belt was actually loose. I'll check the RA belt today as it's under a cover presently.

Slewing is so much quieter than my wife's "coffee grinder" 5 but not as quiet as my CEM25p, but it's pleasant.

Focus - OMG last night was a challenge even with the Bahtinov mask.

I did find M31 manually - this is a single 60s ISO200 exposure:
 

 4 
 on: August 12, 2019, 09:19:56 
Started by telfish - Last post by bmitchell82
Good afternoon Telfish,

just wondering if you are able to take photo of your modification im just looking into some issues with the whole setup at the moment

 5 
 on: August 11, 2019, 14:44:58 
Started by bmitchell82 - Last post by bmitchell82
Good evening all,

I thought ide go here before i have a bit of mount rage.

I have built the Arduino mega 2560 version for the EQ6 as a direct replacement for the OEM motors/board. I am running the following NEMA 17 (17HS19-1684S1) motor.

Voltage is supplied at 14.8V to the system which works within both DRV8825 and Mega specifications. The gear meshing is set so you can move the worm transfer gear nicely with very little backlash and everything is just nice.

Issue. At sidereal tracking it drifts in RA. It cannot calibrate in PHD2 because of the RA Drift however it doesn't move in DEC (North/South) but if you GOTO it pretty well drops it on the sensor at 1200mm.

I have used Custom tracking speed to get it guiding at Siderial (guide star holds position) and putting values for custom DEC tracking sees the star move both ways when you have positive or negative speeds...

Can anybody assist with something that i may have missed? or somewhere to look?

Regards

 6 
 on: August 08, 2019, 14:34:52 
Started by khobar - Last post by khobar
Yesterday evening, I ran Stellarium in "real time" and pointed the mount at perhaps six targets including Saturn, Jupiter, and the moon. The mount slewed to them fine (as verified from our patio).



 7 
 on: August 08, 2019, 00:10:04 
Started by khobar - Last post by khobar
Small update.

It seems my joy is short-lived. Electrically, the mount moves smoothly and quite quickly, but pointing doesn't seem to be working as I had thought. After having left the mount powered up in park for about an hour, I tried to slew to Saturn again and it pointed roughly WSW.

I'll keep at it. I must be overlooking something.


 8 
 on: August 07, 2019, 20:26:11 
Started by khobar - Last post by khobar
Pins 2&4 on M1 (DEC) driver board were shorted. Unfortunately, I don't know what I did to clear the short. Maybe it's gone for good, maybe not. But it's gone for now. ;)

As a result, I was able to slew both axes at full speed (800) simultaneously. That's a big difference already.

DEC was reversed.

Mount now slews in general direction of Saturn in Cartes du Ciel! I'm sure it will do likewise in Stellarium. That makes me very happy indeed!

Thanks very much, Tom. I am so looking forward to clear skies to give it a go outside.




 9 
 on: August 07, 2019, 18:24:51 
Started by khobar - Last post by TCWORLD
Suggests that there is an issue with the microstepping mode in the hardware.

This could be due to a cold solder joint on one of the MSx pins.

Alternatively it could be that you haven't soldered the driver board type jumpers - there are two jumpers between the MCU and the drivers that need to be bridged (e.g. by a piece of wire) depending on which driver type you are using as noted on the silkscreen.

Have you selected the correct driver board in the config utility?

 10 
 on: August 07, 2019, 15:48:30 
Started by khobar - Last post by khobar
Some additional info:

Physically slewing DEC 90 degrees only shows about 45 degrees in EQMOD.


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