Dome Control - Revision history

WikiSysop at 16:09, 25 August 2018

2018-08-25T16:09:54Z

← Older revision		Revision as of 16:09, 25 August 2018
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	== Sirius Domes for CDK20N and CDK20S ==		== Sirius Domes for CDK20N and CDK20S ==

	The original Sirius electronics ~~controls~~ dome rotation and the opening and closure of the upper and lower shutters through manually operated switches. The control board is proprietary, but its operation is determined by wiring to screw terminals that we ~~have~~ modified to connect to external digital systems. The common schematic for rotation and shutters at both sites is shown here:		The original Sirius electronics controled dome rotation and the opening and closure of the upper and lower shutters through manually operated switches. The sup-plied control board was proprietary, but its operation was determined by wiring to screw terminals that we modified to connect to external digital systems. The common schematic for rotation and shutters in this original design at both sites is shown here:


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	The relay box is hardwired to the dome rotation electronics, and also hardwired to the shutter motors and limit switches though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught. The dropline provides polarized DC power to the upper and lower shutter motors, and also returns the power from the solar panel on the dome to the solar controller in the dome rotation box.		The relay box is hardwired to the dome rotation electronics, and also hardwired to the shutter motors and limit switches though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught. The dropline provides polarized DC power to the upper and lower shutter motors, and also returns the power from the solar panel on the dome to the solar controller in the dome rotation box.

	Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards ~~inisde~~ this housing. The connector wiring is illustrated in this schematic.		Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages from the relays to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inside this housing. The connector wiring is illustrated in this schematic.

	<center>[[File:Cdk20_shutter_wiring.png \|300px]]</center>		<center>[[File:Cdk20_shutter_wiring.png \|300px]]</center>

WikiSysop at 15:48, 25 August 2018

2018-08-25T15:48:41Z

← Older revision		Revision as of 15:48, 25 August 2018
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	Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inisde this housing. The connector wiring is illustrated in this schematic.		Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inisde this housing. The connector wiring is illustrated in this schematic.

	<center>[[File:Cdk20_shutter_wiring.png \|~~600px~~]]</center>		<center>[[File:Cdk20_shutter_wiring.png \|300px]]</center>

WikiSysop at 15:48, 25 August 2018

2018-08-25T15:48:10Z

← Older revision		Revision as of 15:48, 25 August 2018
Line 73:		Line 73:
	Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inisde this housing. The connector wiring is illustrated in this schematic.		Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inisde this housing. The connector wiring is illustrated in this schematic.

	<center>[[File:~~Cdk20 shutter relay box sm~~.~~jpg~~ \|600px]]</center>		<center>[[File:Cdk20_shutter_wiring.png \|600px]]</center>

WikiSysop at 15:45, 25 August 2018

2018-08-25T15:45:01Z

← Older revision		Revision as of 15:45, 25 August 2018
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	<center>[[File:Sirius_dome_motor_schematic.jpg\|400px]]</center>		<center>[[File:Sirius_dome_motor_schematic.jpg\|400px]]</center>

	The dome rotation and each of the shutters ~~has~~ a similar relay board that ~~is connected~~ to the battery, solar charger, motor, and limit switches (for the shutter). The boards ~~have~~ a 12-pin screw terminal connector that for the upper shutter has this wiring pattern:		The dome rotation and each of the shutters were supplied with a similar relay board that iconnected to the battery, solar charger, motor, and limit switches (for the shutter). The boards had a 12-pin screw terminal connector that for the upper shutter has this wiring pattern:

	*1 black closed limit switch		*1 black closed limit switch
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	The open and closed limit switch wiring connectors are swapped on the lower shutter board.		The open and closed limit switch wiring connectors are swapped on the lower shutter board.

	A switch ~~applies~~ 12 VDC power to one of two lines that select the direction of rotation, or similarly open or close the two shutters. In computer controlled operation there is a relay system in parallel with the manual switch, such as shown here:		A switch applied 12 VDC power to one of two lines that select the direction of rotation, or similarly open or close the two shutters. In computer controlled operation there is a relay system in parallel with the manual switch, such as shown here:


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	At the CDK20N we have a relay box mounted on the dome wall containing 6 socketed industrial relays with 12 VDC coils. The relays are wired such that the application of the "COM" voltage to a control line causes the relay to close with the same effect as the corresponding switch.		At the CDK20N we have removed these boards and replaced them with a relay box mounted on the dome wall containing 6 socketed industrial relays with 12 VDC coils. The relays are wired such that the application of the "COM" voltage to a control line causes the relay to close with the same effect as the corresponding switch had in the original design.


	<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>		<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>

	The relay box is hardwired to the dome rotation electronics, and ~~may~~ also be hardwired to the shutter ~~electronics~~ though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught. the ~~8 wires in~~ the ~~dropline are color coded~~ on ~~both male and female sides of~~ the ~~Phoenix connector:~~		The relay box is hardwired to the dome rotation electronics, and also hardwired to the shutter motors and limit switches though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught. The dropline provides polarized DC power to the upper and lower shutter motors, and also returns the power from the solar panel on the dome to the solar controller in the dome rotation box.

	*1 brown p. ~~5 upper shutter relay board~~		Inside the dome's junction box there are two Phoenix connectors to connect the polarized motor voltages to the motors and their limit switches. The limit switch functions are bypassed by diodes so that when the voltage is reversed the motor may be backed off the switch. The diodes are incorporated into the connector wiring eliminating the need for additional boards inisde this housing. The connector wiring is illustrated in this schematic.
	*2 ~~red p. 2 upper shutter relay board open~~ limit switch
	*3 orange p. 4 upper shutter relay board closed limit switch
	*4 yellow p. ~~5 lower shutter relay board~~
	*5 ~~green p~~. ~~4 lower shutter relay board closed limit switch~~
	*6 ~~blue p~~. ~~2 lower shutter relay open limit switch~~
	*7 black p. 9 upper shutter relay board
	*8 white no connection


			<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>

WikiSysop: /* Sirius Domes for CDK20N and CDK20S */

2014-11-23T00:13:10Z

Sirius Domes for CDK20N and CDK20S

← Older revision		Revision as of 00:13, 23 November 2014
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	<center>[[File:Sirius_dome_motor_schematic.jpg\|400px]]</center>		<center>[[File:Sirius_dome_motor_schematic.jpg\|400px]]</center>

			The dome rotation and each of the shutters has a similar relay board that is connected to the battery, solar charger, motor, and limit switches (for the shutter). The boards have a 12-pin screw terminal connector that for the upper shutter has this wiring pattern:

			*1 black closed limit switch
			*2 red closed limit switch and brown wire to manual switch
			*3 black open limit switch
			*4 red open limit switch and yellow wire to manual switch
			*5 white common to manual switches
			*6
			*7 black motor
			*8 red motor
			*9 black battery
			*10 red battery
			*11 blue solar panel
			*12 brown solar panel

			The open and closed limit switch wiring connectors are swapped on the lower shutter board.

	A switch applies 12 VDC power to one of two lines that select the direction of rotation, or similarly open or close the two shutters. In computer controlled operation there is a relay system in parallel with the manual switch, such as shown here:		A switch applies 12 VDC power to one of two lines that select the direction of rotation, or similarly open or close the two shutters. In computer controlled operation there is a relay system in parallel with the manual switch, such as shown here:

WikiSysop: /* Sirius Domes for CDK20N and CDK20S */

2014-11-23T00:04:30Z

Sirius Domes for CDK20N and CDK20S

← Older revision		Revision as of 00:04, 23 November 2014
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	<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>		<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>

	The relay box is hardwired to the dome rotation electronics, and may also be hardwired to the shutter electronics though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught.		The relay box is hardwired to the dome rotation electronics, and may also be hardwired to the shutter electronics though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught. the 8 wires in the dropline are color coded on both male and female sides of the Phoenix connector:

			*1 brown p. 5 upper shutter relay board
			*2 red p. 2 upper shutter relay board open limit switch
			*3 orange p. 4 upper shutter relay board closed limit switch
			*4 yellow p. 5 lower shutter relay board
			*5 green p. 4 lower shutter relay board closed limit switch
			*6 blue p. 2 lower shutter relay open limit switch
			*7 black p. 9 upper shutter relay board
			*8 white no connection


	Alternatively, a National Control Devices MirC Wi-Fi relay mirror is used which accepts contact closures from the same Phoenix connector as input, and trips relays on a mirror card at the shutter electronics module. This system eliminates the possibility of that the cable will detach in remote operation. However it also uses more power from the dome solar powered battery.

WikiSysop: /* Software */

2014-08-07T20:24:59Z

Software

← Older revision		Revision as of 20:24, 7 August 2014
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	== Software ==		== Software ==

	Dome rotation software has been written to ~~use the INDI protocol and~~ communicate with the telescope control software in an observatory operations package.		Dome rotation software has been written in C and Python to communicate with the telescope control software in an observatory operations package. New code being developed also offers a connection to other processes through [http://hea-www.harvard.edu/RD/xpa/index.html XPA].

WikiSysop: /* RC24 Ash Dome */

2014-08-07T07:50:58Z

RC24 Ash Dome

← Older revision		Revision as of 07:50, 7 August 2014
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	The larger Ash dome enclosing ~~enclosing~~ the Moore RC24 (MORC24) telescope requires 220V power for rotation and for shutters. The rotation control is through a DIN relay system and modular relays similar to that used for the Sirius domes, except the wiring ~~required~~ mimics a manual AC motor drum switch. One relay sets direction and another relay toggles the mains power on and off. The same pattern is used to open and close the shutter through a dropline.		The larger Ash dome enclosing the Moore RC24 (MORC24) telescope requires 220V power for rotation and for shutters. The rotation control is through a DIN relay system and modular relays similar to that used for the Sirius domes, except the wiring mimics a manual AC motor drum switch. One relay sets direction and another relay toggles the mains power on and off. The same pattern is used to open and close the shutter through a dropline.

WikiSysop: /* Sirius Domes for CDK20N and CDK20S */

2014-08-07T07:49:06Z

Sirius Domes for CDK20N and CDK20S

← Older revision		Revision as of 07:49, 7 August 2014
Line 53:		Line 53:
	<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>		<center>[[File:Cdk20 shutter relay box sm.jpg \|600px]]</center>

	The relay box is hardwired to the dome rotation electronics, and may also be hardwired to the shutter electronics though a dropline to the rotating dome. The line falls at the perimeter of the dome and may 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught.		The relay box is hardwired to the dome rotation electronics, and may also be hardwired to the shutter electronics though a dropline to the rotating dome. The line falls at the perimeter of the dome and may sweep 180 degrees in either direction from south, largely free of obstruction. However, the dropline is connected through an 8-pin Phoenix Contact connector that will pull apart if the cable is caught.

	Alternatively, a National Control Devices MirC Wi-Fi relay mirror is used which accepts contact closures from the same Phoenix connector as input, and trips relays on a mirror card at the shutter electronics module. This system eliminates the possibility of that the cable will detach in remote operation. However it also uses more power from the dome solar powered battery.		Alternatively, a National Control Devices MirC Wi-Fi relay mirror is used which accepts contact closures from the same Phoenix connector as input, and trips relays on a mirror card at the shutter electronics module. This system eliminates the possibility of that the cable will detach in remote operation. However it also uses more power from the dome solar powered battery.
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	This relay order leaves a safe gap on the user interface between shutter and dome rotation. It also avoids relay 3 which, on the module in the CDK20N dome, may have a high resistance contact.		This relay order leaves a safe gap on the user interface between shutter and dome rotation. It also avoids relay 3 which, on the module in the CDK20N dome, may have a high resistance contact.


	== Sirius Shutter Control at CDK20S ==		== Sirius Shutter Control at CDK20S ==

WikiSysop at 07:22, 7 August 2014

2014-08-07T07:22:27Z

← Older revision		Revision as of 07:22, 7 August 2014
Line 78:		Line 78:

	This relay order leaves a safe gap on the user interface between shutter and dome rotation. It also avoids relay 3 which, on the module in the CDK20N dome, may have a high resistance contact.		This relay order leaves a safe gap on the user interface between shutter and dome rotation. It also avoids relay 3 which, on the module in the CDK20N dome, may have a high resistance contact.


			== Sirius Shutter Control at CDK20S ==

			At Mt. Kent the shutter control is wireless and utilizes a system designed by Dr. Rhodes Hart incorporating a solar-powered microcontroller. The controller manages TCP/IP communications through a secure wireless network accessible to remote observers and to observatory control software. Since it is aware of the environment, and requires a heartbeat signal from the observatory watchdog program, it will automatically close the dome should communications or mains power failures occur. It can be programmed to be aware of the rain and dew sensors as well. Addtional details on this controller, which has been duplicated for use in all the enclosures at Mt. Kent, will be provided on another page. Fundamentally it takes on the same role as the relay mirror used in the CDK20N dome, with the addition of monitoring for telescope safety.


			== RC24 Ash Dome ==


			The larger Ash dome enclosing enclosing the Moore RC24 (MORC24) telescope requires 220V power for rotation and for shutters. The rotation control is through a DIN relay system and modular relays similar to that used for the Sirius domes, except the wiring required mimics a manual AC motor drum switch. One relay sets direction and another relay toggles the mains power on and off. The same pattern is used to open and close the shutter through a dropline.