Rf45 clone glow up.

Kieran
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05 Apr 2025 05:05 #325746 by Kieran

Rf45 clone glow up. was created by Kieran

Hey guys. I just wanted to show off my new build in process.

Rf45 type machine, to be cut up and built back.

imgur.com/5rXfGbQ

Basic premise...

imgur.com/09rXoGL

imgur.com/a/Er23Lcq

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Hakan
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05 Apr 2025 06:15 #325748 by Hakan

Replied by Hakan on topic Rf45 clone glow up.

Interesting, hopefully we will see more pictures along the way.
Maybe turn the linear rail upside down on X?

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tommylight
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05 Apr 2025 14:39 #325763 by tommylight

Replied by tommylight on topic Rf45 clone glow up.

You can upload pictures here on the forum by clicking on "attachments" below the editor.
Thank you.

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Kieran
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08 Apr 2025 03:52 - 08 Apr 2025 03:54 #325894 by Kieran

Replied by Kieran on topic Rf45 clone glow up.

Got the table modified last week.

Last edit: 08 Apr 2025 03:54 by Kieran.

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Kieran
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08 Apr 2025 03:56 #325895 by Kieran

Replied by Kieran on topic Rf45 clone glow up.

Got some goodies too.

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spumco
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08 Apr 2025 11:58 #325919 by spumco

Replied by spumco on topic Rf45 clone glow up.

OP - That's a nice harmonic drive you've got there, especially with the big through-bore.

If you still need some mounting inspiration, Andy Pugh did a fantastic job of documenting his 4th axis build based on similar reducer.

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andypugh
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09 Apr 2025 16:03 #325995 by andypugh

Replied by andypugh on topic Rf45 clone glow up.

spumco wrote:
4th axis build based on similar reducer.

Do you mean this one? bodgesoc.blogspot.com/2017/05/harmonic.html ?

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spumco
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09 Apr 2025 19:43 #326008 by spumco

Replied by spumco on topic Rf45 clone glow up.

andypugh wrote:

Do you mean this one? bodgesoc.blogspot.com/2017/05/harmonic.html ?

The very one. I got jealous when you mentioned how convenient it is for you to get castings made.

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Kieran
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10 Apr 2025 05:53 #326016 by Kieran

Replied by Kieran on topic Rf45 clone glow up.

How's the rigidity of the harmonic drive? I'm thinking of using mine as a B axis for the spindle. I will find one size smaller with a faster reduction for the table mounted rotory A or C axis.

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andypugh
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11 Apr 2025 14:23 #326066 by andypugh

Replied by andypugh on topic Rf45 clone glow up.

Kieran wrote:
How's the rigidity of the harmonic drive?

It seems OK. The HD website quotes values for torsional stiffness, but to be honest I don't know what value would be appropriate for a milling machine, so the numbers aren't useful to me.

But I frequently use it just as a handy way to mount round stock and have noticed no issues.

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