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 1 
 on: Today at 17:04:01 
Started by CCphoto - Last post by TCWORLD
Sounds like the old supply is on its way out (as opposed to current rating being too low).

It's also possible that the connector for the supply is wearing out and making intermittent connection. That would probably lead to the issue whereby the USB-Serial PIC locks up from the USB being connected but no 12V supply.

 2 
 on: Today at 15:59:25 
Started by CCphoto - Last post by CCphoto
Found the problem with this. It appears that the 12volt power supply rated at 4.5 amps is not man enough for the job. I found it works okay with a 5amp one but the lower rated one must be a cheapo and not delivering enough umph.
Regards
Charles Clark

 3 
 on: April 22, 2019, 22:30:03 
Started by CCphoto - Last post by CCphoto
Hi Tom my previous DIY build using your v 4.6 board has packed in for some reason. I thought it might have been a windows update or Bit defender virus protection but I am unable to suss it out. I have reloaded the AStroEQ Config utility and tried a number of usb cables. but while it sees the Comms port (5), when I try to upload the configuration the upload fails and I can see sync errors as it attempts to try 10 times.
Any ideas of what to try would be greatly appreciated

Thanks in anticipation Charles Clark

PS everything has been previously working fine for a while
Also could you let me know when you have some PCB boards in stock

 4 
 on: April 20, 2019, 00:33:06 
Started by lbim - Last post by lbim
jslight,

I am very grateful for your detailed information, really appreciate this.
In my recent setting the AstroEQ with dual-axis steppers kit is working as advertised, have no problem at all.
It is enough for good tracking and when I've try to use it as goto mount it shows that steppers upgrade is necessary. Your respond will help me to get there sooner than later.
Once more thanks a lot.

LBIM

 5 
 on: April 19, 2019, 10:23:08 
Started by williamge - Last post by TCWORLD
I'll add support in the next release, but with the workload I have at the moment, that may have to wait for a couple of weeks.

Kind Regards,
Tom,

 6 
 on: April 19, 2019, 10:22:10 
Started by paul_astrix - Last post by TCWORLD
Glad you're up and running.

And yeah, the labelling of the coils is really awkward - some manufacturers use A/B for coil and 1/2 for the ends, others use 1/2 for the coil and A/B for the ends.

I've updated the AstroEQ FAQ to add this information.


Kind Regards,
Tom.

 7 
 on: April 19, 2019, 05:29:11 
Started by paul_astrix - Last post by jslight
I use XT-60 connectors made of Teflon, they work great and are somewhat hard to disconnect.

I personally use an XT-60 to barrel jack adapter; if you are going to solder one side directly to the AstroEQ, I recommend adding a knot in the cable before feeding it through the hole, in order to relieve stress on the solder joints.

 8 
 on: April 19, 2019, 05:11:55 
Started by lbim - Last post by jslight
I am using NEMA17 stepper motors that work great on my Celestron CG-4.  You can use them with either gears or belts/pulleys (the latter is recommended to reduce backlash).  NEMA14 motors would also work (smaller size).

Stepper specs (from https://www.astroeq.co.uk/tutorials.php?link=custommotors):
  • Rated Current: <1.2A per Phase
  • Rated Voltage: Lower voltage generally have higher torque, but can cause stuttering. Higher voltage (max 12V) will reduce stuttering issues.
  • Inductance: again, lower is better. Look for something <10mH per phase
  • Step Angle: typically 1.8 degrees or 0.9 degrees.

Based on my experience with my motors (5.4V), I would recommend finding motors with a voltage rating close-ish to, but lower than, the voltage supply you are using (e.g. ~9-11.5V motors w/ 12V supply); you don't need the extra torque with a CG-4.  Also, I would recommend using 0.9 steppers if you are doing lots of astrophotography, 1.8 steppers if you want higher top speeds.  OMC Stepper Online has a good selection.

Probably the more difficult part is making the mounting brackets; personally, I just cut pieces of L-angle aluminium and drilled holes (easy  ;D).

 9 
 on: April 18, 2019, 15:25:04 
Started by williamge - Last post by williamge
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.
can i connect the mode select pins ms1 and ms2 on tmc2208 to high volt ,  useing tmc2100 config without ustep change ?
i find out tmc2208 is more silence then tmc2100 (i bought two tmc2100)


No,i can't , i tested


by the  way  , TMC2100 slew speed only works at 400x, is that right?

 10 
 on: April 18, 2019, 14:28:41 
Started by williamge - Last post by williamge
TMC2208 isn't one of the drivers I've tested.

I've just checked and its mode select pins have very different meaning from the TMC2100, so it's no wonder it is not tracking at the correct rate.

I would need to add support to both the config utility and the AstroEQ firmware in order to support those drivers.
can i connect the mode select pins ms1 and ms2 on tmc2208 to high volt ,  useing tmc2100 config without ustep change ?
i find out tmc2208 is more silence then tmc2100 (i bought two tmc2100)

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