Designing Precision Gantries from imprecise parts

This is for people that have the actual skills and intimate knowledge of how to do items that would be of interest to forum members.
Joshua Vasquez
Posts: 7
Joined: Wed Nov 23, 2016 4:24 pm
Location: Sunnyvale, CA, United States

Designing Precision Gantries from imprecise parts

Postby Joshua Vasquez » Sun Jan 01, 2017 12:07 pm

Hey folks,

I just finished a post on designing precision frames with structrural framing systems (80/20, Rexroth, Makerslide, etc.). This post is the distilled "lessons-learned" from spending 2016 designing/building my homebrew laser cutter frame.

May it be of use to you in your next 3D printer or laser cutter build!
Homebrew 60-watt laser cutter built from VSlot extrusions, LightObject components, and controlled with LinuxCNC; 450mm (Y) x 600 (X); Laser Homes to BL

Joshua Vasquez

User avatar
Keith Sherwin
Site Admin
Posts: 1000
Joined: Fri Jun 24, 2016 1:44 pm
Location: Okanagan Valley, B.C. Canada

Re: Designing Precision Gantries from imprecise parts

Postby Keith Sherwin » Sun Jan 01, 2017 12:28 pm

Very interesting and nice write up.Thanks for sharing that.
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!

Ron Gosnell
Posts: 44
Joined: Sat Dec 03, 2016 11:05 am
Location: Arkansas

Re: Designing Precision Gantries from imprecise parts

Postby Ron Gosnell » Sun Jan 01, 2017 2:00 pm

Why was I born so stupid. That's a great article way above my head.
ThunderLaser Mars 90 130 watt 900 x 600 TL
Ruida 644XG Controller RDWORKS 8.01.18
Windows 10 Ethernet Connected

sebastien laforet
Posts: 100
Joined: Wed Sep 07, 2016 1:23 am
Location: Lyon, France

Re: Designing Precision Gantries from imprecise parts

Postby sebastien laforet » Mon Jan 02, 2017 12:58 am

very interesting writeup. thank you.

juste one question, does anybody know why the frame systems do not include "diagonal" components. in order to have squareness that does not move under efforts, the triangulated frame would be more resistant, when a square has no rigidity beyond the connectors..
Sébastien Laforet
machine : Bodor BCL-0605 (60x50) with 100W laser with TR origin.
Live in France
Primarily works laser for my wife (school teacher, so lots of boxes, letters, puzzles, ...) and miniature scenery (32mm scale : warmachine, infinity)

User avatar
fred ungewitter
Posts: 223
Joined: Tue Aug 16, 2016 12:55 pm
Location: East Central FL, USA

Re: Designing Precision Gantries from imprecise parts

Postby fred ungewitter » Mon Jan 02, 2017 4:19 am

Some designs require that the space within the frame provide for moving parts. A diagonal support would cause collision. In the case of the analysis presented here, the addition of gussets are effectively diagonal supports.

I'm a fan of diagonal supports for the rigidity of the design. Truss bridges, towers and similar construction use diagonals (triangles) to provide strength without excess additional weight.

Redsail clone 60w 700 x 500
home upper right
RDWorks 8.01.18
Windows 7

Emblaser A3 4w diode laser
BCN3D Sigma Dual Extruder 3d printer
LMS Mini-mill
Cube 3rd gen 3d printer (works great, for sale)
Under construction: OX CNC 1000x750 router - out of the box, still in baggies!

Return to “How To”

Who is online

Users browsing this forum: No registered users and 2 guests