Gear ratios?
- maceemiller
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Gear ratios?
Hi all.
So I have a 3.3 RPM synchronous motor for my barn door tracker. Using gears, what would I need to get the RPM down to 1?
Thankyou
Carl
So I have a 3.3 RPM synchronous motor for my barn door tracker. Using gears, what would I need to get the RPM down to 1?
Thankyou
Carl
- Thefatkitty
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Re: Gear ratios?
Perhaps a 33 tooth gear on the motor, and a 10 tooth on the nut for the rod.... If I'm doing the math right I'm trying the same sort of thing as well
Good luck, be curious as to how all this works for you!
All the best,
Good luck, be curious as to how all this works for you!
All the best,
Mark
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
- maceemiller
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Re: Gear ratios?
Mmmmm....
I think I've worked it out...
For example, my motor is 3.3RPM
If the cog on the motor has 24 teeth and the other cog has 80 teeth I divide 80 by 24 which gives 3.3.
Divide the motor rpm which is 3.3 by the cogs division which is also 3.3 that gives an answer of 1, the rpm I need for my tracker.
Am I right in this?
I think I've worked it out...
For example, my motor is 3.3RPM
If the cog on the motor has 24 teeth and the other cog has 80 teeth I divide 80 by 24 which gives 3.3.
Divide the motor rpm which is 3.3 by the cogs division which is also 3.3 that gives an answer of 1, the rpm I need for my tracker.
Am I right in this?
- Thefatkitty
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Re: Gear ratios?
Looks good to me, and I think I had it backwards for which gear goes where... it's 6AM here, first cup of coffee... Your math skills are significantly better than mine as well
I'm still trying to find a motor that I can use with my so basic electronic skills, or lack thereof
Good luck!
I'm still trying to find a motor that I can use with my so basic electronic skills, or lack thereof
Good luck!
Mark
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
- maceemiller
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Re: Gear ratios?
I did think the cogs were backwards! I'm no electronic whiz either. The motor I'm using I got from an old Christmas decoration.....it was a reindeer that lights up and nods its head slowlyThefatkitty wrote: ↑Thu Mar 05, 2020 11:25 am Looks good to me, and I think I had it backwards for which gear goes where... it's 6AM here, first cup of coffee... Your math skills are significantly better than mine as well
I'm still trying to find a motor that I can use with my so basic electronic skills, or lack thereof
Good luck!
- Thefatkitty
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Re: Gear ratios?
Yeah, if I did the gears there'd be some impressive star trails That is absolutely brilliant where you got the motor from, it never would have dawned on me! We have this Scooby-Doo dressed as Santa; we got it when my daughter was five. It waves a paw or something like that, and we haven't had it out in a few years. Wonder what I'll be doing tonight?maceemiller wrote: ↑Thu Mar 05, 2020 11:37 am I did think the cogs were backwards! I'm no electronic whiz either. The motor I'm using I got from an old Christmas decoration.....it was a reindeer that lights up and nods its head slowly
Thanks again for the idea, Carl!
All the best,
Mark
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
Member of the RASC
- maceemiller
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Re: Gear ratios?
Let me know how you get onThefatkitty wrote: ↑Thu Mar 05, 2020 12:16 pmYeah, if I did the gears there'd be some impressive star trails That is absolutely brilliant where you got the motor from, it never would have dawned on me! We have this Scooby-Doo dressed as Santa; we got it when my daughter was five. It waves a paw or something like that, and we haven't had it out in a few years. Wonder what I'll be doing tonight?maceemiller wrote: ↑Thu Mar 05, 2020 11:37 am I did think the cogs were backwards! I'm no electronic whiz either. The motor I'm using I got from an old Christmas decoration.....it was a reindeer that lights up and nods its head slowly
Thanks again for the idea, Carl!
All the best,
Heres a picture of the motor I will be using.....
- maceemiller
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Re: Gear ratios?
maceemiller wrote: ↑Thu Mar 05, 2020 8:06 pmLet me know how you get onThefatkitty wrote: ↑Thu Mar 05, 2020 12:16 pmYeah, if I did the gears there'd be some impressive star trails That is absolutely brilliant where you got the motor from, it never would have dawned on me! We have this Scooby-Doo dressed as Santa; we got it when my daughter was five. It waves a paw or something like that, and we haven't had it out in a few years. Wonder what I'll be doing tonight?maceemiller wrote: ↑Thu Mar 05, 2020 11:37 am I did think the cogs were backwards! I'm no electronic whiz either. The motor I'm using I got from an old Christmas decoration.....it was a reindeer that lights up and nods its head slowly
Thanks again for the idea, Carl!
All the best,
Heres a picture of the motor I will be using.....
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