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Gantry/carriage assembly

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goplumcrazy
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Joined: Sun Nov 25, 2018 9:31 am

Gantry/carriage assembly

Post by goplumcrazy » Wed Dec 05, 2018 7:12 pm

I anyone familiar with these assemblies? Starting my table build research. All advice is welcome.
Attachments
gantry brackets.jpg

robertspark
Posts: 201
Joined: Mon Jun 12, 2017 6:43 pm
Location: nr Liverpool, UK

Re: Gantry/carriage assembly

Post by robertspark » Thu Dec 06, 2018 2:31 pm

Yes my table is similar to that what do you want to know
UCCNC,
Sheetcam
Hypertherm Powermax 45 (nonXP)
Neuron Lite THC
Hobby user (4x4 home table)

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acourtjester
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Posts: 3509
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: Gantry/carriage assembly

Post by acourtjester » Thu Dec 06, 2018 4:25 pm

DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

goplumcrazy
Posts: 4
Joined: Sun Nov 25, 2018 9:31 am

Re: Gantry/carriage assembly

Post by goplumcrazy » Mon Dec 10, 2018 3:36 pm

It seems so easy to use brackets that roll on square tubing. I'm just scratching my head why so many table builds I see are so elaborate. I am just starting my build and trying to decide how intricate I will go. What are the downside to just plane ole roller bearings mounted with an eccentric? Another think I have been wondering. Some of the racks I've seen have no mounting bolts through them. Are they welded in place? Epoxy?

robertspark
Posts: 201
Joined: Mon Jun 12, 2017 6:43 pm
Location: nr Liverpool, UK

Re: Gantry/carriage assembly

Post by robertspark » Mon Dec 10, 2018 3:56 pm

To some extent.... Simplicity of using hiwin / THC rails... I mean think about it... It is constrained in two planes already.... And it's manufactured to close tolerance....

Cold rolled steel tube is not precision... Skate board bearings made in china are not precision.... But they are cheap... At the end of the day my view is .... It is plasma and CNC is a damn sight easier than hand cutting or grinding to size....

I don't use rack sorry.... I use htd 5mm belts 25mm width, steel wire lined.... Another way to skin that same cat... But it is only a 5'x5' table.... If I went 10' I'd switch to rack.... No belt slop or flap (they do have custom springs and are very taught)
... I'd probably spot welding the rack to the rail..... (Tig/mig) can always be ground off later with an angle grinder or just replace the rails with new when needing new racks....
UCCNC,
Sheetcam
Hypertherm Powermax 45 (nonXP)
Neuron Lite THC
Hobby user (4x4 home table)

robertspark
Posts: 201
Joined: Mon Jun 12, 2017 6:43 pm
Location: nr Liverpool, UK

Re: Gantry/carriage assembly

Post by robertspark » Mon Dec 10, 2018 4:15 pm

UCCNC,
Sheetcam
Hypertherm Powermax 45 (nonXP)
Neuron Lite THC
Hobby user (4x4 home table)

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acourtjester
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Posts: 3509
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: Gantry/carriage assembly

Post by acourtjester » Mon Dec 10, 2018 5:13 pm

Ok here is my video
https://www.youtube.com/watch?v=fErYc7W ... wq0KTKpuRw
this one using a drag knife to cut sign vinyl, If the table did not track the ends will not meet :lol:
https://www.youtube.com/watch?v=gn1Xh9P ... e=youtu.be
DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

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WyoGreen
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Posts: 724
Joined: Tue Mar 04, 2014 8:36 pm
Location: Cheyenne, Wyoming

Re: Gantry/carriage assembly

Post by WyoGreen » Mon Dec 10, 2018 6:45 pm

GoPlumCrazy,

My racks are secured to the table with 3M VHB tape. It's the same stuff they use to stick trim on cars nowdays.

Steve
Precision Plasma gantry
CommandCNC Linux controller w/Feather Touch & PN200 hand controller
HT-45 plasma cutter
Plate Marker
Router
Laser

djreiswig
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Posts: 519
Joined: Thu Nov 19, 2015 10:02 pm

Re: Gantry/carriage assembly

Post by djreiswig » Mon Dec 10, 2018 10:03 pm

jester

I love watching that Amazing Grace cut. It doesn't look like much until it does the outline and then.
BAM!!
2014 Bulltear (StarLab) 4x8
C&CNC EtherCut
Mach3, SheetCam, Draftsight
Hypertherm PM65
Oxy/Acetylene Flame Torch
Pneumatic Plate Marker, Ohmic, 10 inch Rotary Chuck (in progress)

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acourtjester
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Posts: 3509
Joined: Sat Jun 02, 2012 6:04 pm
Location: Pensacola, Fla

Re: Gantry/carriage assembly

Post by acourtjester » Tue Dec 11, 2018 9:38 am

Thanks I enjoy watching the results too. :D
DIY 4X4 Plasma/Router Table
CandCNC DTHC-IV & Feather Touch
Hypertherm PM65 Machine Torch
Drag Knife and Scribe
Miller Mig welder
13" metal lathe
Small Mill
Everlast PM 256 tig

tothwelding
Posts: 12
Joined: Mon Aug 20, 2018 10:06 pm
Location: tavares fl
Contact:

Re: Gantry/carriage assembly

Post by tothwelding » Sun Jan 27, 2019 1:34 pm

I have built a 4x5 table using these carriages same as the pic. My table runs great. I have made a few changes like adding some 1x1 alum bar to extend my gantry back further. My gear rack is welded to the square tube instead of the 3m tape

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