best material for the bed to cover honeycomb

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Jason Wright
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Re: best material for the bed to cover honeycomb

Post by Jason Wright » Thu Dec 22, 2016 12:47 pm

i hop it will be ok using steel as i have just bought a 3mm sheet for my bed
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

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Gene Uselman
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Accessories: I have a combining lens, pin tables [homebuilt], honeycomb table [LightObject], wireless remote on the way [crossed fingers]
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Re: best material for the bed to cover honeycomb

Post by Gene Uselman » Thu Dec 22, 2016 1:22 pm

Hi Don- I have not made the alum pinbed, I got tangled up in the Bodor laser [which has a flat stainless table and I have been using my perforated steel pinbed with] and a new [to me] car that I had to setup for an extended roadtrip [we are in San Deigo now]. The alum pinbed will be for my 3x4' laser, which has a blade bed. The steel actually works well and is a lot easier [but only 1x2']. I may end up with two of those [oldish and lazyish]. :twisted:

Don Flynn
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Re: best material for the bed to cover honeycomb

Post by Don Flynn » Thu Dec 22, 2016 1:41 pm

Prior to the modular acrylic bed like Russ"s I had a rolled steel bed with pins I ordered from amazon or McMaster Carr. The issue I had was keeping things flat on it and I got a strange pattern on the bottom of my cuts that was the same as the pattern of the steel even though it was far away. I was curious about the aluminum because I recently bought a Shopbot CNC and maybe fabricate one. Thanks for your input.
Chinese Laser 60 Watts. Bed Size 500mm X 300mm Home Position:TL.
RDWorks v8.01.18 on Windows 10

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Gene Uselman
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Location: Suburban Minneapolis, Minnesota, US
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Nickname: Gene
Laser Machine Make or Type: QC1390
Laser Power: 130W EFR
Laser Bed Size: 36x49
Home Position: TR
RDWorks Version: V8.01.19 LO
Accessories: I have a combining lens, pin tables [homebuilt], honeycomb table [LightObject], wireless remote on the way [crossed fingers]
Windows Version: Win 7 Pro

Re: best material for the bed to cover honeycomb

Post by Gene Uselman » Thu Dec 22, 2016 2:39 pm

I had problems getting it flat too- made an angle iron frame to solve that. I have not seen the reflection issue, I use 2" rollpins from Fastenal and even with the 130watts it seems fine. I first tried .0625 steel and then went to .125 which worked better. My big laser cabinet draws from the bottom so I need as much open downward as possible. Gene

Martín Lázaro
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Re: best material for the bed to cover honeycomb

Post by Martín Lázaro » Mon Dec 26, 2016 6:02 am

Hi Jason. i do my cuts with a pop rivets inserted in the holes of honeycomb bed
I found the correct rivets testing different diameters to fit in the honeycomb holes
This rivets have a lenght of 2 inches and allow me enough distance to avoid reflections from honeycomb
The other advantage is that the fume extraction from below continue working because i dont block the honeycomb holes
Here this rivets are not perfectly equal then i need adjust height if it is neccesary. Jus t 1 mm or 2
Martín.-

Brian Book
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Re: best material for the bed to cover honeycomb

Post by Brian Book » Mon Dec 26, 2016 9:01 am

Hi Martin ... I like your suggestion and will certainly give that a try ... I like the fact that you can place them where ever you need to and still have the full extraction.

Thank You

Brian
Ray Fine 80w 6040 110v TL
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Jason Wright
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Re: best material for the bed to cover honeycomb

Post by Jason Wright » Mon Dec 26, 2016 9:16 am

Not sure that will work for me as i think its my honeycomb that has a dip in the middle
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

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Doug Fisher
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Re: best material for the bed to cover honeycomb

Post by Doug Fisher » Tue Dec 27, 2016 12:55 am

Jason -

As I noted in my write-up about removing and cleaning the honeycomb table on these machines, you can often correct the dip in the middle by shimming along the steel bar that is part of the subframe below the honeycomb mesh. It may not cure all of your flexing issues but it will solve most and minimize the rest.
80 Watt 700mm x 500mm Ke Hui KH-7050 Laser (Similar to the Red Sail),T.R.
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Dan Norman
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Re: best material for the bed to cover honeycomb

Post by Dan Norman » Fri Mar 03, 2017 10:28 pm

I think this is very interesting. Inexpensive, easy to cut, & fire resistant. I think it could be used for making fixtures. When my machine arrives I will try this.
Simon Morris wrote:I'm using "fireboard", which is a kind of cement-bound chipboard.

It saws quite easily, and is totally incombustable.
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Malcolm Ferrie
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Re: best material for the bed to cover honeycomb

Post by Malcolm Ferrie » Sat Mar 04, 2017 5:53 am

I have a pin bed, the only problem i have is, If you are cutting out loads of smaller jobs, The cut out can fall between the pins and land in the path of the next job to be cut and as the laser cuts the next job the beam goes through and marks the job that just fell through.
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