Avalon Instruments provide a power supply with a 5,5 mm external diameter, 2,1 mm internal diameter, that has been chosen due to his standard characteristichs, easy to find on the market and, above all, during the risk evaluation process, it has been noticed that in case of cable stretching, the connector can come out without any damages.

Alt-Az Polar Alignment

The following table shows the knobs rotation arc-minutes amount for a fine Polar Alignment adjustment with one full knob turn.


Mount Linear M-uno M-zero
Arc minutes per knob turn  91,2 79,2 78,74 79,2 61,8 110,4

 Download the pdf table

The best guiding performance with our belt driven mounts comes by using the lowest possible guiding speed ( 0,2 / 0,4 ) , the shortest possible guide exposure ( 1 sec is ok ) and the lowest possible RA/DEC pulse guide duration ( 300 / 600 ) .

Due to the Fast Reverse Belt Drive System fast pulse guide responding, it is strongly suggested to use a smoothed guide settings, to avoid overcorrections/oscillations.

The above PHD2 guide parameters table can be used as starting values that must be adjusted on depending of the setup and the live performance, we also suggest to use the Off Axis Guider, specially with long focal length longer then 800 mm or/and mirror telescopes, to avoid differential mechanical flexure that can create issues on the final star shape quality.

 Focal length 250 mm 500 mm 1000 mm 2000 mm

RA/DEC Max Duration





RA/DEC Aggressiveness





Minimum Move

0,00 0,00 0,00 0,00
Mount Guide Algorithm Lowpass2 Lowpass2 Lowpass2 Lowpass2
Guide Exposure in seconds 0,5 to 1 0,5 to 1 1 to 2 1 to 2
RA/DEC Autoguide Speed 0,50/0,60 0,35/0,45 0,25/0,35 0,15/0,25


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