GTD E.fric User Manual Download Page 1

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E.fric Precision Friction Drive German Equatorial Mount

User Manual

WARNINGS

For the technical details and specifications of the product please consult the

. This document explains the correct use of the E.fric to get the most out of

your purchase. For a guide to using the OnStep controller

Setup

Use a sturdy tripod/pier specified
at least for 80 kg load.

The tripod or pier should be
approximately levelled to avoid
cross interference between
azimuth and elevation when
polar alignment is done.

GTD E.fric manual

March 2021

Potential finger trap:

do not insert your finger into the elevation base while adjusting elevation! It

may injure your finger.

Hazard to the drive electronics

: do not rotate manually the axes of the mount with locked

clutches and connected electronics! The motors can emit high energy pulses that damage the
electronics.

Azimuth pin to North

3pc hard plastic

pads

Central lock

M10 or M12

Legs should rest

On a firm surface

Summary of Contents for E.fric

Page 2: ...in the mount s range up to 84mm Operating the E fric Connect the electronics one of many optional choices with your motor cable supplied on request The supply voltage to the electronics should NOT be under 12V GTD E fric manual 2 March 2021 RA axis lock clckwise closed DEC axis lock clockwise closed RA Motor connector DEC motor connector ...

Page 4: ...some positions not all The top and bottom of the OTA are symmetric positions any side mounted accessory should be balanced You see some tips for fine tuning the balance above GTD E fric manual 4 March 2021 Losmandy knobs on left Tubering knobs on right Focuser knob On top bottom ...

Page 6: ...rosshair Apply refraction correction Onstep The suggested goto distance is 15 30 degree No meridian flip Ideally move in one coordinate only at a time Ra or Dec Use bright stars that are close in DEC for Ra test or close in Ra for DEC test Avoid positions near the horizon If the mount travels LESS INCrease the reduction microsteps 1 degree in GTD E fric manual 6 March 2021 ...

Page 7: ... testing goto precision in DEC Improving flip precision optional The largest source of pointing error when the moun is making a meridian flip is optical axis dec axis orthogonality error Use trimming grub screws or shims between the losmandy rail and one of the tube rings GTD E fric manual 7 March 2021 ...