You could ask Dave Palmer, KB5WIA if he noted that spec., when he rebuilt his Yaesu motor last year (March 2012) http://kb5wia.blogspot.com/2012/03/yaesu-g5500-rotator-motor-repair.html
w9gb == From: "Mike Hoblinski" To: [email protected] Subject: [amsat-bb] G5500 Rotor motor Question
Anybody know what the rpm of the AC motors are. I know from the Yaesu specs that after all of the gear reduction they list EL as 67 seconds for EL and 58 Seconds for AZ.
I would like to experiment with an AZ and EL system but like to see what RPM the motor starts out with and how much torque to get the final results. They show Elevation at 101 FT-LBS and AZ at 44 FT-lbs.
I have looked around to see if somewhere the specs are available for the motor but have had no luck. I have seen quite a few pictures of rebuilds of that rotor with part number and have a manual that shows parts.
Mike Hoblinski
N6IMF ==
Oh, I didn't measure the rotation speed of the motor during my rebuild, unfortunately. In all the research I did prior to the rebuild (=scrambling to find an equivalent motor) I didn't see any published specs on the unit either. I'd think Domenico's calculations would probably be the closest, since it is a simple 2-pole AC motor.
73! Dave KB5WIA
On Sun, Apr 28, 2013 at 2:31 PM, Gregory Beat [email protected]wrote:
You could ask Dave Palmer, KB5WIA if he noted that spec., when he rebuilt his Yaesu motor last year (March 2012) http://kb5wia.blogspot.com/2012/03/yaesu-g5500-rotator-motor-repair.html
w9gb
From: "Mike Hoblinski" To: [email protected] Subject: [amsat-bb] G5500 Rotor motor Question
Anybody know what the rpm of the AC motors are. I know from the Yaesu specs that after all of the gear reduction they list EL as 67 seconds for EL and 58 Seconds for AZ.
Has anyone measured the gear reduction used in the rotor to compute the raw speed of the motor. I have always been a fan of checking theoretical calculations with actual measurements to make sure we stay within the ballpark.
Fortunately I have never had to take my G5500 apart so have never checked the gear ratio.
W9KE Tom Doyle
On Mon, Apr 29, 2013 at 11:29 AM, David Palmer KB5WIA [email protected]wrote:
Oh, I didn't measure the rotation speed of the motor during my rebuild, unfortunately. In all the research I did prior to the rebuild (=scrambling to find an equivalent motor) I didn't see any published specs on the unit either. I'd think Domenico's calculations would probably be the closest, since it is a simple 2-pole AC motor.
73! Dave KB5WIA
On Sun, Apr 28, 2013 at 2:31 PM, Gregory Beat <[email protected]
wrote:
You could ask Dave Palmer, KB5WIA if he noted that spec., when he rebuilt his Yaesu motor last year (March 2012) http://kb5wia.blogspot.com/2012/03/yaesu-g5500-rotator-motor-repair.html
w9gb
From: "Mike Hoblinski" To: [email protected] Subject: [amsat-bb] G5500 Rotor motor Question
Anybody know what the rpm of the AC motors are. I know from the Yaesu specs that after all of the gear reduction they list EL as 67 seconds for EL and 58 Seconds for AZ.
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
-
David Palmer KB5WIA -
Gregory Beat -
Thomas Doyle