about to start...zero help?

[MJBoluijt]

My first attempt for making epicycloid gear with slitsaw, at first I have chosen maintain high, the teeth were cut off.
But after that all is ok. Modul 0.5 Z 28



Kind regards

Rien

[ArtF]

Rien:

  Great job. Looks good ( other than the maintain height tests. :) ). Looks
like not a bad epicycloidal from a  slitsaw. With all the bugs and changes from last year
the generation of gears from the 4th axis module seems to be getting near bulletproofed.

  Thx for the example..

Art

[MJBoluijt]

Hi Art,

Yes the form seems good, there was one fault in the file, see a part of it here, no F before the 1000.0
Of course that was easy to change.

Regards,

Rien.

(  No Epilog set )

( Gearotic 2.0 GCode Begins. )
( Object Spur  )
( Job will comprise 1 rotations of the rotary axis.  )
( Tools Used:  )
( Rooting: EndMill2mm Tool #1  )
( Wall Straightening: EndMill2mm Tool #1  )
( Tangential Shave: EndMill2mm Tool #1  )
( Blank size for this gear :  )
( Diam: 15.5543 Thickness: 10.000 )
( SlitSaw Posting. Zero to side of blank.  )
( Root Clearance Begins. )
( Tool change to EndMill2mm )
M6 T1
G43H1
M3 S1750
G0 X23.403  Y0.250  Z0.000  A0.000  
G1 Y-1.572  Z-0.000  1000.0
G1 X-23.403  F3000.00  
G1 Y-1.572  Z-0.093  
G1 X23.403  
G1 Y-1.572  Z0.093  
G1 X-23.403  
G0 Y0.250  Z0.093  
G0 X23.403  
( Root Wall Begins. )
G0 Y0.250  Z0.255  A3.214  
G1 Y-1.563  Z0.255  1000.0
G1 X-23.403  F3000.00  
G1 Y-1.563  Z-0.255  A-3.214  
G1 X23.403  
G0 Y0.250  Z-0.255  
( Tangential Shaving Begins. )
G0 Y0.250  Z0.255  A3.214  
G1 Y-0.777  Z0.255  1000.0
G1 X-23.403  F3000.00  
G0 Y-0.000  Z1.306  A11.846  
G0 Y-0.810  Z1.306  
G1 X23.403  

This is my home made A axis, made with a small harmonic drive.

[ArtF]

Nice Drive:


Sorry about that floating 1000, Ill find that error and kill it, I thought I had it before.. :)

Thx
Art

[Headsmess]

oooooh, tell me more about this harmonic drive...like, how much, from where? :)


and how is it on backlash?

[MJBoluijt]

Look here at regular time
http://www.ebay.com/sch/Electrical-Test ... ?_from=R40 and search for Harmonic Drive.

Sometimes there are cheap ones. Mine was $ 130.00 Take care you buy the Harmonic drive and not the harmonic gear.
No Backlasch  my drive  is about 80mm, 50:1
On a radius of 65 mm you can measure some flex when you make radial force, about 0.01 to 0.03 mm
The cross rollerbearing is strong enough for holding a 80mm 3 jaw chuck

[Headsmess]

yep, did the fleabay check and found a few pop up for under $100. yours looks to be of a lot more compact than what i was seeing...

would really prefer a hollow shaft type but hey... what i saw was more in the region of $400+...ouch. matter of luck/patience i guess.

i always liked the idea of making one by using a toothed belt inside out but noone has yet described how i will make an internal pulley with the correct tooth profile!