TS-Optics MONORAIL 3" focuser with micro reduction - Thread connection M117x1

TS-Optics M117 3" Monorail Focuser

The Monorail focuser is a further development of the conventional Crayford focusers. Our goal was to offer a focuser for the highest loads, such as heavy CCD cameras, with very high precision at the same time. This is exactly what the Monorail extensions have achieved.

The TSLPR3 has a M117x1 union thread on the telescope side. The thread adapts perfectly to RC/Ritchey-Chrétien telescopes from TS-Optics or Astro Tech from 10" aperture.

Summary of the advantages of the TS Monorail focuser:

♦ Higher resilience than normal Crayford focusers: instead of small ball bearings, a solid stainless steel rail is used, which is fixed on the side.

♦ More precise guidance of the air chamber and no more overturning when tightening, which also allows for a shorter design.

♦ smooth operation and finer adjustment even with loads up to 4 kg

♦ 1:10 micro reduction for precise focus

♦ Motor focus can be tailored

How the MONORAIL extension works:

The advantage of the MONORAIL principle:

The function of the ball bearing is taken over by the stainless steel rail, which is permanently connected to the extension tube. Nothing can go wrong there anymore. Only the side guide is still taken over by ball bearings. However, these bearings only fix the lateral position and no longer have to absorb any load. Tilt, which is possible due to creep of ball bearings in conventional Crayford focusers, is thus ruled out.

The extension tube is fixed with a clamping screw, which is located exactly in the middle at the top. As a result, the entire structure is uniformly loaded. Definitely no more twisting, the extension tube remains 100% in the prescribed position.

With the lower center screw you only adjust the friction (resistance to friction) - see the image on the left.

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