FOCUSMATE™ INSTALLATION
(TFM-2000)
32 Elkay Dr., Chester, NY 10918 (845) 469-4551 televue.com
PLEASE READ CAREFULLY BEFORE PROCEEDING
Numbered images below correspond to these instruction steps.
1.
Check that Tele Vue focuser knob has 5 holes (black arrow).
2.
Decide which knob to replace (left hand or right hand).
3.
Prepare to remove screw that holds knob. Screw may be very tight: use only Phillips
#2 screwdriver with large grip (see image) to apply maximum torque and avoid stripping
screw slots. Lay scope on side with knob up. Grip knob in one hand and set screwdriver in
knob screw. Bear down hard with screwdriver and turn screw. Do not try to twist the knob
off the shaft, as rack and pinion may be damaged. Any difficulty, call Tele Vue.
4.
To unseat knob, use the handle of a screwdriver to rap sharply against the inside (flat
side) of the knob. The knob will pop off the tapered shaft. Be cautious after doing this:
make sure the opposite knob remains in contact with the chrome pinion bearing tube.
5.
Screw on the new Focusmate™ assembly by twisting the large black–rubber grip ring
(black arrow) until tight, while keeping the opposite knob pressed against the chrome
pinion bearing tube. Do not tighten by turning the stainless steel housing.
6.
Remove the two pinion cap screws CLOSEST to new assembly (white arrows). DO NOT
loosen other screws as unsettling pinion/rack relationship may affect the telescope’s high-
power performance.
The next step is to attach the plastic bracket between the pinion cap and Focusmate™
assembly. The bracket should lie parallel across these parts.
7.
Rotate Focusmate™ so flat area (black arrow) with two mounting holes is parallel to
pinion cap (white arrow).
Important Note on use of Spacer and O-Rings During Focusmate™ Assembly
1.
If your focuser has a chrome drawtube, you must use the spacer and possibly the
o-rings as described in the procedure.
2.
If your focuser has a black drawtube, and the pinion cap is about 3/8" thick
(measured height from focuser body to flat top of cap) you should use the spacer
without o-rings.
3.
The newest production telescopes use a black focuser drawtube with a pinion cap
about 9/16" thick (measured height from focuser body to flat top of cap)
eliminating the need for spacers or o-rings.
8.
Place spacer block between plastic bracket and pinion cap (white arrow), and loosely
fasten with two long screws supplied (black arrows). Do not screw the bracket onto the
Focusmate™ assembly yet. Position the bracket to leave a small gap (black arrow)
between the end and the Focusmate™ stainless steel body. Tighten long screws. Now
note how the bracket lies in relation to the flat area of the Focusmate™ assembly:
a.
If the bracket lies flat against the Focusmate™ assembly, do not use any o-rings
in the next step.
