best material for the bed to cover honeycomb

General Laser Usage Topics
Jason Wright
Posts: 167
Joined: Fri Nov 04, 2016 12:57 am
Location: Oxford, UK
Contact:

best material for the bed to cover honeycomb

Postby Jason Wright » Tue Nov 29, 2016 11:50 am

Im going to make a pin bed but ill obviously need to cover the honeycomb bed. so what would be the best plain material to use, i can think of 4 options

1, 2mm steel
2, 3mm aluminium
3, acrylic - maybe 5mm?
4, MDF - say 12mm

something thats flat and stable


cheers
Chinese 700x500 80 watt machine - TR
Mods: custom air assist off a workshop compressor, ammeter installed, switch panel, overnight internal tube heater

RD works V8.01.18 windows 10

Jason

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

Re: best material for the bed to cover honeycomb

Postby Keith Sherwin » Tue Nov 29, 2016 12:05 pm

Do NOT use MDF!
Something like steel or aluminum with Acrylic on top of that to space the pins. Can't remember if aluminum or steel is the preferred material.
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!

Jason Wright
Posts: 167
Joined: Fri Nov 04, 2016 12:57 am
Location: Oxford, UK
Contact:

Re: best material for the bed to cover honeycomb

Postby Jason Wright » Tue Nov 29, 2016 12:08 pm

ok thanks, thought the ali might not be preferred over he steel as it reflects more, but i could paint it and it will be lighter, just didnt want to put too much weight on the bed, and i wouldnt use anything less than 2mm steel as it can bend so defeats the object of levelling my bed tomorrow
Chinese 700x500 80 watt machine - TR
Mods: custom air assist off a workshop compressor, ammeter installed, switch panel, overnight internal tube heater

RD works V8.01.18 windows 10

Jason

User avatar
Gene Uselman
Posts: 794
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: best material for the bed to cover honeycomb

Postby Gene Uselman » Tue Nov 29, 2016 12:22 pm

The problem with a pin bed is getting enough height, unless the pins are embedded in metal you will have fires. I am currently using a 1/8x12x24 pc of pierced steel from amazon with 2" roll pins, which works pretty well. Russ had acrylic but he has less power on this original machine, so less excess energy into the base. I plan to make a .25 alum plate on my cnc with holes arranged in alternating rows so the pins are approx 1.5" apart and with larger holes in the spaces for smoke/fumes to escape to the bottom. Steel is less reflective than alum BTW. Something like below- the red circle is approx 1.5" for spacing- also it is convenient to have at least a small area with closer spaced pins for smaller parts. Gene

pin board.jpg
You do not have the required permissions to view the files attached to this post.
Gene- 130W 1300x900 China Laser with 2" FL lens
V8.01.19 RDWorks on Win 7 pro
500mm Z, blade table machine home is upper right.

100W Reci tube in a Bodor BCL0605MU V8.01.19
600x500x 200Z, SS table, 2" FL- mach home upper right
Vectric Aspire software- FlexiSignPro- vector/bitmap

Willy Ivy
Posts: 56
Joined: Tue Aug 09, 2016 8:07 am
Location: Pattison, Texas
Contact:

Re: best material for the bed to cover honeycomb

Postby Willy Ivy » Tue Nov 29, 2016 12:38 pm

Definitely DO NOT use MDF or plywood. See my Be Careful post in modifications to see what happened to my first laser.
50w Chinese laser KH-7050, 500x300, TL, 2" lens, hot dog rotary
Modifications: 60w tube & power supply, honeycomb bed, amp meter, easy access mirrors
RDWorks V8.01.18, CorelDraw X6, W7 Pro
Pattison, Texas
http://dadburnitlaser.com
Willy

Jason Wright
Posts: 167
Joined: Fri Nov 04, 2016 12:57 am
Location: Oxford, UK
Contact:

Re: best material for the bed to cover honeycomb

Postby Jason Wright » Tue Nov 29, 2016 12:46 pm

ive seen Russ's new design pin boards 8mm acrylic with 32mm dowel pins so there seems to be plenty of room under the work, ill definitely be making the actual pins boards from acrylic, im asking about the cover for the bed to sit them on
Chinese 700x500 80 watt machine - TR
Mods: custom air assist off a workshop compressor, ammeter installed, switch panel, overnight internal tube heater

RD works V8.01.18 windows 10

Jason

User avatar
Gene Uselman
Posts: 794
Joined: Thu Jul 07, 2016 1:18 pm
Location: Suburban Minneapolis, Minnesota, US

Re: best material for the bed to cover honeycomb

Postby Gene Uselman » Tue Nov 29, 2016 1:15 pm

I would then suggest steel as it is less reflective. I think with the power you have and 1.25" pins you will be really melting the acrylic if not burning it.
Gene- 130W 1300x900 China Laser with 2" FL lens
V8.01.19 RDWorks on Win 7 pro
500mm Z, blade table machine home is upper right.

100W Reci tube in a Bodor BCL0605MU V8.01.19
600x500x 200Z, SS table, 2" FL- mach home upper right
Vectric Aspire software- FlexiSignPro- vector/bitmap

Jason Wright
Posts: 167
Joined: Fri Nov 04, 2016 12:57 am
Location: Oxford, UK
Contact:

Re: best material for the bed to cover honeycomb

Postby Jason Wright » Tue Nov 29, 2016 1:25 pm

maybe longer pins then, i can easily get hold of 50mm x 4mm pins and set them in the acrylic, i think if im still seriously effecting the acrylic 42mm below the job i need to look at the power im using maybe
Chinese 700x500 80 watt machine - TR
Mods: custom air assist off a workshop compressor, ammeter installed, switch panel, overnight internal tube heater

RD works V8.01.18 windows 10

Jason

Dustin Hawkinson
Posts: 141
Joined: Sat Nov 19, 2016 4:55 pm
Location: Phoenix, AZ USA

Re: best material for the bed to cover honeycomb

Postby Dustin Hawkinson » Tue Nov 29, 2016 10:14 pm

I use mild steel that is about ~1.6mm thick (16 guage? I forget). It is not too heavy but rigid enough not to worry about bending. I tested a little when I first put it in over my aluminum bed and it is far less reflective than the aluminum.

I have a piece of 22 gauge mild steel (~0.75mm) that I tried to use at first, but it was too flexible. My bed is only 300x500 so on your larger bed you could go 2mm thick if you were worried about flex.
40W (ebay 50W blue wonder), 300mm x 500m, TL
Windows10 RDW 8.01.19
(The member formerly known as astral)
-Dustin

User avatar
Simon Morris
Posts: 36
Joined: Fri Sep 02, 2016 12:49 am
Location: Whitchurch, UK

Re: best material for the bed to cover honeycomb

Postby Simon Morris » Wed Nov 30, 2016 2:11 am

I'm using "fireboard", which is a kind of cement-bound chipboard.

It saws quite easily, and is totally incombustable.
E-bay Blue & White "50W (40 W) Laser" (644XG) TL
Working area 500mm x300mm
RDWorks v8.01.18
Simon


Return to “Laser Usage”

Who is online

Users browsing this forum: No registered users and 1 guest