EPEC - did you try it?

[sleepwalker]

Hi Armado,

I am pleased about the good news that it is going ahead.
Thanks for your work.

But I think compliance with the tolerance of the ring is not that difficult.
of course the axis should run "round" for EPEC.
The lateral tolerance is at least 1mm (+/- 0,5mm).
0.2 mm and 1 ° axial tolerance should be doable with a simple lathe.
See here for Renishaw-Data:
http://www.renishaw.de/de/rgh34-lineare-wegmess-systeme--6450#ElementMediaList12280
The ring may indeed be adjustable. Just as with me.

Unfortunately, I have already the interface with 0.2 my resolution (digital).
I hope, therefore, that it is also possible to buffer rapid signals of high-resolution digital encoder during rapid rotating the RA axis somehow.
So I can do the meridian-switch by hand and do not wake up the neighbors. (My motors are very noisy at 420x)

best regards, Dennis

[Armando]

Hi Dennis,

But I think compliance with the tolerance of the ring is not that difficult.
of course the axis should run "round" for EPEC.
The lateral tolerance is at least 1mm (+/- 0,5mm).
0.2 mm and 1 ° axial tolerance should be doable with a simple lathe.
See here for Renishaw-Data:
http://www.renishaw.de/de/rgh34-lineare-wegmess-systeme--6450#ElementMediaList12280
The ring may indeed be adjustable. Just as with me.

I would be tempted to prefer a Renishaw solution to keep the polar scope and avoid the interpolator. But I should figure out if the RA axis displacement that occurs when locking/unlocking the mount on RA can be managed. I own an EQ6...
I'm also not sure the displacement is always the same: both outer surface of the "cylindrical" body of the worm wheel and the inner bearings can contribute to a not constant displacement.
I also have no idea where to place a Renishaw ring on my mount .
What diameter is your ring?

Unfortunately, I have already the interface with 0.2 my resolution (digital).
I hope, therefore, that it is also possible to buffer rapid signals of high-resolution digital encoder during rapid rotating the RA axis somehow.
So I can do the meridian-switch by hand and do not wake up the neighbors. (My motors are very noisy at 420x)

I would suggest to use a lower speed. I'm not impressed at all when I see a mount moving at high speeds. I prefer a good tracking mount.

CS
Armando

[sleepwalker]

Hi Armando,
the only place that I see on the EQ6 for a ring encoder, the scale for the celestial coordinates.
Whether the change in displacement is still within the acceptable range, you have to measure.
But perhaps it would be advisable anyway to customize this mount .
There are thin plates and liners (PTFE). So that you can reduce or eliminate the gap.
My ring has a diameter of about 125mm. That is the minimum Renishaw said.

Slower speed for GOTO and Meridian switch?
Well ... I actually bought the Encoder Option, in order not to lose alignment when I release the clamping of the axis.
And now, with high resolution encoders crashes down the LFEP when I move the telescope without an motor.
This is not acceptable. And if I have to let the motors run slower, so that the birds do not fall from the trees at night, already not.

I am now looking around for an electronic buffer ("Data Cache" or so).
The part should store the signals and pass so slowly to the LFEP that such is not overwhelmed. I think that a stroke of about 200 - 400kH would be optimal.
Unfortunately, I am absolutely Unknowingly in electronics and need help.

CS, Dennis

[Armando]

Hi @all,

I just opened a new thread about the firmware development. Unfortunately no good news...

http://forum.lfep.de/index.php/topic,38.msg273/topicseen.html#msg273

Clear Skies!
Armando Beneduce