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 on: September 07, 2020, 05:50:11 
Started by AradoKYSky - Last post by AradoKYSky

I resolved the loose pulleys. However, I think I have different problem. I have the same ratio 3:1 but 36:12 and 30:10 are different. The motors are the same. This looks like a design issue. Back to the drawing board.

Using this site for a ballpark answer, I found 36:12 is slower than 30:10 by 66.7%. This explains that issues that I am having. Less teeth and narrower belt means faster. I ordered a matching pair of 4:1 to produce an easier working relationship.


 on: August 28, 2020, 05:09:30 
Started by TCWORLD - Last post by tombkk
Can you share the covers for the nema17 motors?



 on: August 27, 2020, 15:49:30 
Started by odelay - Last post by odelay
Hello, I purchased a 4.5 pth pcb, but I can't find any informations about it.
Do someone has the documentation for the straps to be done to wire the drivers correctly?
And what is the "1" header?

Thank you!
Edit: 1 is the programming header... :D

 on: August 09, 2020, 10:23:23 
Started by AradoKYSky - Last post by TCWORLD
Glad you've sorted it.

 on: August 09, 2020, 09:13:07 
Started by TCWORLD - Last post by grozmaistor
Is it possible to use the hand controller  simultaneously with EQMod computer connection?
I have read somewhere in the posts that you have to use just one of the two types.

 on: August 08, 2020, 23:11:41 
Started by TCWORLD - Last post by grozmaistor
Can you share the covers for the nema17 motors?

 on: August 08, 2020, 19:01:40 
Started by AradoKYSky - Last post by AradoKYSky

Hmm... the dec and ra pulley set screws were loose. That was the problem.

 on: August 07, 2020, 12:26:44 
Started by AradoKYSky - Last post by AradoKYSky

I seem to be running into an issue. My gear is based on RPI4B and AstroBerry 2.0.3. AstroBerry contains INDI and KSTARS. I have the AstroEQ using ttyACM. I use AstroEQLoader to setup AstroEQ. My mount is an old Celestron VIXEN Super Polaris.

Any clear night is the same. KSTARS and EQMOD arrive at the target. AstroEQ is halfway there. Instead of pointing south from north the device is pointing at the ground. I listen for slipping. My RA does chatter sometimes. It is more in line with the target than DEC. When KSTARS stops at the target, AstroEQ stops. AstroEQ hasnít finished getting there.

My AstroEQ config:
Motor Step: 1.8 degrees
Mount gear: 144
Gear Ratio: 3.0
Slew Rate: 94 <ó

This Slew Rate is my selection. Manually slewing to a target is smooth and faster at this setting. Any larger and slewing is a crawl. It isnít getting to the target. Something is out of sync. To me, it must be the slew rate. I have amps set to .7.

The motors are the same. I think the gear ratios might be overly optimistic. I used the stated specifications. The gears are not the same. The motors are the same style, NEMA17.

I will investigate the gear ratios. I will also check for symmetry within EQMOD.

How should the Slew Rate be set? To me, it should not cause any out of step issues. It is a speed control.

 on: August 06, 2020, 03:28:05 
Started by TCWORLD - Last post by tombkk
I 3D-printed hand-controller enclosure for the V4.6 PCB from ABS plastic (see 1:57 in the clip). I use a ATTiny85 Arduino board and a five-position switch for mode and speed selection (long-push = cycle through ST-4 - 2x - GOTO mode, click LEFT - RIGHT - UP - DOWN = R.A.- - R.A.+ - DEC+ - DEC-).  There is a red-green LED indicator to indicate the mode (green = ST-4, orange = 2x, red = GOTO). See 2:05 for details.

I also 3D-printed enclosure for 0.9į NEMA-17 DEC (1:28) & R.A. (1:38) motors.


 on: July 30, 2020, 04:27:20 
Started by grozmaistor - Last post by tombkk
I printed motor covers and PCBV4.6 enclosure from ABS-plastic, all designed by myself. STL files will be published on Thingiverse.com


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