Motors for ultima,meade lx and cg5 mounts??
Posted 28 October 2012 - 07:22 PM
And also do they use 2 motors for tracking and one for slewing??? I would imagine using a lower rpm motor for tracking wouldnt be able to slew at a fast rate so do they have a seperate motor for slewing???
I would love some help on this please!!! hahahaha
what i really need to know is the type of motor ( DC servos??) and what gear ratio and rpms they have
Posted 28 October 2012 - 11:36 PM
They use an USDigital E4P encoder with 256ppr.
The gearbox has a really strange ratio, 47.976... (non-integral ratio)
This motor -
has the exact same gear ratio as the CG-5/CGEM/CGEM-DX motors in fact some folks have transplanted the gearbox onto their CGEM motors (the actual motor above is much smaller than the CGEM motors).
Posted 29 October 2012 - 07:28 AM
23/8 x 30/12 x 30/12 x 32/12 = 47.9166666667
When compare that figure with 47.9765625:1, it's 800:801 (strange, since 801 has a large prime "89" number in it).
89/32 x 23/4 x 3 = 47.9765625
Re: 2 different motors for different tracking or slewing speed (q from Whirlpoolm51)
No one does that. DC perm-mag has a wide speed range thus can do that. For hybrid stepper, it's the low gear-down mechanical gear box plus microstepping (electronic gear shift) does the wide dynamic range magic.
Posted 29 October 2012 - 04:29 PM
i have noticed they use very wierd ratios for thier eq mounts i dont get it!!