tripod for miling

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Carsten
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Joined: Sat Jan 12, 2019 6:05 pm

tripod for miling

Post by Carsten » Sun Jan 13, 2019 7:38 pm

I have made an video of the tripod I was building at home.



for the successful implementation of this project the powerfull KFLOP
was of great importance.
Thank you DYNOMOTION

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TomKerekes
Posts: 516
Joined: Mon Dec 04, 2017 1:49 am

Re: tripod for miling

Post by TomKerekes » Sun Jan 13, 2019 7:44 pm

Hi Carsten,

That is great work and super impressive!

Did you use KMotion Kinematics? Are you willing to share the Kinematics class you used?
Regards,

Tom Kerekes
Dynomotion, Inc.

Carsten
Posts: 4
Joined: Sat Jan 12, 2019 6:05 pm

Re: tripod for miling

Post by Carsten » Sun Jan 13, 2019 8:56 pm

hi Tom,
I'm just trying to remember. We had have email contact in may 2015.
You wrote to me, that I have to recompile the gcodeinterpreter.
I think I´v made changes only to kinematics3rod.c.
Attachments
Kinematics3Rod.cpp
(2.78 KiB) Downloaded 11 times

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TomKerekes
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Re: tripod for miling

Post by TomKerekes » Sun Jan 13, 2019 9:04 pm

Hi Carsten,

That looks like it.

Thanks!
Regards,

Tom Kerekes
Dynomotion, Inc.

Carsten
Posts: 4
Joined: Sat Jan 12, 2019 6:05 pm

Re: tripod for miling

Post by Carsten » Mon Jan 14, 2019 8:18 pm

for better understanding two more files
tmp1.jpg
Attachments
kinematics.txt
(1018 Bytes) Downloaded 15 times

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TomKerekes
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Re: tripod for miling

Post by TomKerekes » Mon Jan 14, 2019 8:40 pm

Nice illustration that really helps.

I'm curious. It seems the equations assume the mechanics are perfect. Motors mounted in perfect positions, guide rails perfectly parallel to z, link rods perfect length, etc. Do you have any idea what type of accuracy is achieved? Have you considered any further calibrations?
Regards,

Tom Kerekes
Dynomotion, Inc.

Carsten
Posts: 4
Joined: Sat Jan 12, 2019 6:05 pm

Re: tripod for miling

Post by Carsten » Wed Jan 16, 2019 7:43 pm

Well recognized Tom.
There are no geo compensation. For non linear systems it could be difficult to realize.
Therefor all parts was made on a Hermle C400 industrial milling machine.
The overall accuracy off the Tripods working space is better 0.05mm.
Dependent on travel distances I have made parts with 0.01mm tollerance.
The main reason for me to construct an build this machine was the the fascination
for nonlinare systems.

CNC_Machines
Posts: 16
Joined: Fri Apr 27, 2018 10:43 pm

Re: tripod for miling

Post by CNC_Machines » Mon Jul 01, 2019 11:30 pm

This is very cool! I am curious about how to determine the usable machining envelope for such a machine. It appears that the rod lengths are 300mm, as you approach that distance in X or Y it seems that the arm one arm would be laying flat and the other two close to vertical. In that case we would lose a lot of accuracy.

Did you try to follow any rules? Maybe something like R1=1.25 X machining diameter?

Very impressive!

Scott

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