Mesu-Optics Archives - Modern Astronomy

Mesu Pier Adapter Plate

Bernard Karpinski — Tue, 22 Sep 2015 17:39:40 +0000

This Mesu Pier Adapter Plate is for the original version of the mount and assists with attachment of the mount to your existing pier.

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Mesu-Mount 300

Bernard Karpinski — Thu, 20 Aug 2015 12:29:13 +0000

For Advanced Amateurs and Professionals.

The Mesu-Mount 300 is a scaled up development of the Mesu-Mount 200 with 300mm friction wheels and an advanced version of the driving mechanism used in the Mesu-Mount 200.

Contact Us For Information regarding Availability and Price

The Mesu-Mount 300 is equipped, as standard, with two high resolution absolute Renishaw encoders.

These encoders give 67 million pulses per rotation, an accuracy of 0.02 arc-seconds/pulse in RA and Declination.

With absolute encoders, after a one time first alignment, the position of the telescope is always known after switching on the mount.

With this mount it’s possible to track “diffraction limited” with even a 50cm (20″) telescope.

The resolution of the telescope, and the seeing, will have more effect on the tracking accuracy then the capabilities of the Mesu-Mount 300.

The whole system is controlled by the Servo Controller II made by Sidereal Technology (USA).

Specifications

Drive system
Gear ratio
Payload
Meridian flip
Backlash
Latitude range
Pointing accuracy
Guide accurancy
Periodic error
GOTO speed
Mount control
Power consumption

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Friction wheels driven by Servo motors
1 : 5000
>100kg
yes
No
0 – 90 degrees
0,02″ (under ideal circumstances)
0,02″ (under ideal circumstances)
No
6 – 8 degrees/sec (or faster when needed).
ArgoNavis hand controller and/or PC (planetarium program)
Average is 400mA (when the mount guides for 90% of the time)

The Mesu-Mount 300 (left) and Mesu-Mount 200 (right) side by side

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Mesu e200 Mount

c.rogers — Wed, 24 Jun 2015 22:28:31 +0000

Mesu e200 Mount (e for enhanced) aka Mesu Mount 200 MKII

The primary image shows the Mesu e200 Mount adapted to a Berlebach tripod with a wedge for UK latitudes, other images show the “bent pillar” which removes the need for a meridian flip. The pillar is also shown dismantled, for transportation – if need be.

These are the main enhancements over the much admired, and copied, original Mesu 200 Mount which the new version of the mount builds on:

– Cable management through the centre of the head.

– You can lock the axis in any position you like.

– You can decouple the motors for easy balancing.

– Motor encoders now have 16.000.000 ticks/rev. instead of 8.000.000.

– The RA axis can traverse >360 degrees whereas with the old mount it was 225 degrees then a meridian flip was required.

– The drive mechanism has been improved by tweaking dimensions and materials.

– The weight of the mount has decreased by 10kg while stiffness is improved.

– Separation of head and Latitude adjustment mechanism is a Mesu innovation, significant Latitude adjustment is rarely necessary in the UK, so why supply a large, heavy mechanism to allow 90 degrees of adjustment?

The result is a 17kg mount with a load capacity of up to 100kg

This new enhanced version of the original Mesu 200 mount builds on the work put into the original design with features borrowed from the Mesu 300 and some additional tweaks.

Click here for the Sky at Night magazine review of the original mount, from 2013

Mesu Mount 200 MKII Unboxing and review

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