FocusPro User`s Manual - Astrometric Instruments
Contents
1. focus position however the in limit function of this switch can be disabled by configuration switch 2 see table 1 for use with continuous rotation cam focusers that have no in limit 3 3 4 Out limit switch A switch that engages when the focuser is at its point of maximum outward travel can optionally be connected between pins 9 and a Gnd pin e g pin 8 on the Terminal Block This switch can be either normally opened or normally closed however it must be the same type as the Home In limit switch The type of limit switch is specified with configuration switch 1 see table 1 This switch is optional and can be disabled by configuration switch 2 see table 1 for use with continuous rotation cam focusers that have no out limit 3 3 5 Temperature probe FocusPro s temperature sensor board when attached to the TempSense TempSense inputs on the Terminal Block provides direct temperature sensing through FocusPro software 3 3 6 RS232 interface to client PC The RS232 port see figure 1 accepts a standard 4 wire Astrometric COM cable Note the RS232 connection to a client PC cannot be used simultaneously with the TCS connection to SkyWalker Configuration switch 3 see table 1 must be On to enable RS232 communications The RS232 interface provides connection between FocusPro hardware and FocusPro software and when upgrading FocusPro s firmware 3 3 7 TCS bus connection The two Telescope Control System TCS ports labeled TCS2. module topology note pin 1 on Removable Terminal Block Copyright 2012 Astrometric Instruments Inc 3 FocusPro User s Manual 3 Installation 3 1 Mounting It is recommended that the FocusPro CA unit be mounted where there is a nominal air space around the unit for cooling airflow It is also nominal if the unit is mounted to metal or other heat conducting material The unit will not dissipate very much heat however if there is no airflow and or an insulated mounting then the electronic temperatures may get too high 3 2 Connection diagram SVDC SVDC SVDC 10kOhm gt 10kOhm 5 16 2kOhm a Thermistor To internal Analog to Digital converter TempSense I TempSense se a a a ee gt in p Home In Limit oA RAN Home n limit ams 100kOhm cane Bipolar Stepper Motor Terminal Block Vm Chopper Driver Figure 2 FocusPro connection diagram 3 3 Wiring connections 3 3 1 Motor FocusPro drives bipolar stepper motors in a microstepping mode where each full step is divided into 32 microsteps With a standard 200 full steps rev stepper motor this provides 6 400 microsteps rev Any bipolar stepper motor should work with FocusPro however lower performance high inductance motors can potentially sing when operating since the high inductance of these motors can cause FocusPro s internal Chopper Driver see figure 2 to operate at lower audible frequencies The maximum current provided p
3. 1 and TCS2 in figure 1 accept standard 6 wire Astrometric TCS cables Either port can be used to connect to SkyWalker or onwards to other peripherals in a daisy chained configuration Note the TCS connection to SkyWalker cannot be used simultaneously with the RS232 connection to a client PC The TCS interface provides connection to FocusPro through SkyWalker when used with Maestro software Configuration switch 3 see table 1 must be Off to enable the TCS connection to SkyWalker 3 4 Power up When powered up the stepper motor connected to FocusPro may sing slightly It will not be able to be moved unless FocusPro is connected to FocusPro exe see below SkyWalker or the optional handpaddle is installed The Status LED figure 1 will light as follows On continuous device error inoperable Mostly on with short blink off operating properly but no communications to SkyWalker or FocusPro software detected within the last second Mostly off with short blink on operating properly and communications to SkyWalker or FocusPro software detected within the last second Using FocusPro software 4 1 Installation 4 1 1 Software installation Copyright 2012 Astrometric Instruments Inc 6 FocusPro User s Manual Run the FocusProM_NN_RRR exe program where M_NN_RRR is the version number of the present software release By default this will install the following files in c Program Files Astrometric FocusPro Focus
4. FocusPro User s Manual Copyright 2013 Astrometric Instruments Inc Last revision date 10 Sep 2013 For FocusPro Software Firmware 1 00 000 or greater This document can be ordered as Astrometric Instruments part number DOC 16 FocusPro User s Manual Table of Contents A so ate Gensco REI Zi Pedra Fe AS AS Ie hm a Ore Na al See Aen Sas tio OA I i 5 dnsfallaconiso soul nenti seese TT Le AV TO UTNE A A A E A a 3 2 Connection DATA A T0101 0 EE LOI E E DOE UD da 4 Using Foc sPro SoftWare a dle MTS O A A leali ria O NN 5 PEC ONG tii aida Copyright 2012 Astrometric Instruments Inc 2 FocusPro User s Manual 1 Introduction FocusPro provides precise absolute focus control for astronomical telescopes FocusPro provides ASCOM compliancy and an optional handpaddle for manual at telescope control This document details FocusPro CA which is designed for custom applications which provide a bipolar stepper motor home index switch and optional limit of travel switches 2 Features In out limit of travel sensing Temperature sensing Programmable step rates accelerations Selectable maximum motor current rating available choices are 0 9A and 2 0A specify this when ordering PC based user interface software FocusPro exe included 100 compliant ASCOM Focus interface FocusPro CA 4 Telescope focus control Jil WINS 19018 ESTMETA a qeA0uIa y Instruments Figure 1 FocusPro
5. Pro exe the FocusPro executable file Create a short cut to this file on your Desktop Quick Launch bar or Start Menu FocusProRegister bat amp FocusProRegister vbs see next subsection Setup vbs see Setup section below 4 1 2 ASCOM registration To enable FocusPro s ASCOM interface FocusPro exe must be registered with ASCOM as a Focuser driver To do this first double click on FocusProRegister bat and then FocusProRegister vbs in that order to run them Once this is completed FocusPro exe will be registered as an ASCOM Focuser driver and available from client software applications as FocusPro by Astrometric Inst 4 2 Startup Follow these steps to startup FocusPro software 1 Assure that a serial port connection exists between the PC running FocusPro software and FocusPro s COM input figure 1 2 Turn on FocusPro hardware 3 Start FocusPro software on the PC 4 Under the Setup group select the COM Port that connects to the hardware At this point the hardware and software should be connected Press the Out In and Halt buttons to assure that the focus motor works 4 3 Setup The following one time settings need to be made for normal operation Motor step ratio this specifies the number of real motor steps issued reported for each motor step commanded displayed For example if this is set to 10 then a GoTo of 200 will result in the motor being moved to a step position of 2000 5 Specifica
6. ect to the positive and negative terminals of the power supply FocusPro accepts a power supply voltage between 12V and 28V A 4A supply is sufficient for motors to 2A Vs fuse 2A Vm fuse 5A Pwr jumper Figure 3 internal Pwr jumper and fuses Fusing and reverse voltage protection is provided internal to the FocusPro unit Reverse voltage no greater than 28V will not damage the unit however it will likely burn out one or both of the input protection fuses see specifications section for fuse details 3 3 3 Home In limit switch A switch that engages when the focuser is at its point of maximum inward travel must be connected between pins 7 and a Gnd pin e g pin 6 on the Terminal Block This switch must be normally opened or normally closed however it must be the same type as the Out limit switch The type of limit switch is specified with the Limits polarity positive selection on the FocusPro software When checked the limits both the Home In limit and the Out limit are valid when the limit switches are OPEN and the limit inputs are pulled to 5VDC internal to FocusPro Copyright 2012 Astrometric Instruments Inc 5 FocusPro User s Manual When un checked the limits both the Home In limit and the Out limit are valid when the limit switches are CLOSED and the limit inputs are pulled to Gnd through the switch T Limits polarity positive This switch is not optional since FocusPro needs a home position to reference
7. er motor coil phase is hardwired inside FocusPro There are two choices 0 9A and 2 0A The current rating is labeled on FocusPro s enclosure Connect the bipolar stepper motor to the Terminal Block as shown in figure 2 If the motor leads exceed 10 it is recommended that the positive and negative wires on each coil are twisted together to minimize the generation of electrical noise 3 3 2 Power supply Copyright 2012 Astrometric Instruments Inc 4 FocusPro User s Manual FocusPro has two internal power supply connections Vm and Vs Vm is the motor supply and Vs is the control logic supply There is an internal Pwr jumper figure 3 which shorts these two power supplies together Use the following table to determine if the jumper should be installed or removed by default it is installed Usage Power shorting jumper FocusPro is used stand alone and not connected to SkyWalker Installed FocusPro is connected to SkyWalker and a the max motor coil current Installed is less than 1A and b SkyWalker s 12VDC nominal power supply is sufficient to drive the motor 3 FocusPro is connected to SkyWalker and either the motor coil current Removed is set to gt 1A or the motor requires more than 12VDC N i y n O Table 2 Power shorting jumper usage Note for case 1 and case 3 a power supply must be connected to the Pwr connector lower left in figure 1 The cable shipped with FocusPro provides flying leads to conn
8. tions Size 6 05 x 2 20 x 1 00 Power Supply Vm 10 8VDC to 28VDC Supply current Typical for 0 9A motor slewing 350mA Typical for 2 0A motor un loaded slewing 1 1A Max 4 0A Internal Fusing e Motor supply fuse 5x20mm fast blow SA Installed per figure 3 Logic supply fuse 5x20mm fast blow 2A Installed per figure 3 Environmental Requirements 20C to SOC ambient 5 95 relative humidity non condensing Copyright 2012 Astrometric Instruments Inc 7 FocusPro User s Manual Copyright 2012 Astrometric Instruments Inc
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