fixing glass to the bed

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fixing glass to the bed

Postby thawkins » 2015-Jan-Sat-22-Jan

I live in a part of the world where it is often hard to get parts or materials, so i have been forced to develop an out look where im continualy checking out consumer goods to see if they can be repurposed for things 3d. (You should see my chopping board and toilet tissue roll holder based filament spooler).

One of the problems of using a glass bed is getting it to reliably fix to the bed whilst allowing effient heat transfer to the glass from the heatbed.

There are various arrangements using printed clips, bulldog clips etc to afix the glass plate and stop it moving during printing. However they can cause issues by creating raised obsticles on the bed surface.

I have found a gloriously effective and cheap method in my local cookshop. They sell a 1/16th thick silicon rubber mat designed for rolling out pastry or fondant icing on. Its about 300x400mm so its much bigger than most beds and easy to cut. Cost me about $3.

Just cut the mat with sissors to your bed size, lay it on the bed, lay the glass ontop of it, job done!, no adhesives or clips etc needed. You can easily lift the glass off, but for sideways sheer forces it maintains a death grip on both surfaces. So there are no clips or fixings, just gravity and the unnerving ability of silicone rubber to stick like a leech to flat surfaces, particularly hot ones.

Silicone rubber is also a very very good transmitter of heat, its used inside PC heatsinks to provide an electricaly insullated but high thermal conductive layer between the top of the CPU and the heatsink. (Lookup gina pads) . Its also used to create flexible cooking moulds for cakes etc, so it can tolerate very high temps up to 400c.
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-------------------------------
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fixing glass to the bed

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Re: fixing glass to the bed

Postby orangefurball » 2015-Jan-Sun-05-Jan

Wow that's awesome, I've had a few crashed with my hotend and the bulldog clips.

How does it fare with fast movements back and forth? The ones where you feel like the printer is on the verge of shaking itself apart.

Are you using it on your simple or another printer with a bed that moves

This may solve a couple issues I've been having!
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Re: fixing glass to the bed

Postby thawkins » 2015-Jan-Sun-06-Jan

orangefurball wrote:Wow that's awesome, I've had a few crashed with my hotend and the bulldog clips.

How does it fare with fast movements back and forth? The ones where you feel like the printer is on the verge of shaking itself apart.

Are you using it on your simple or another printer with a bed that moves

This may solve a couple issues I've been having!


Im currently using it on a printer with a raising bed, but i have plenty of the silicone rubber, and will be putting it onto the new jonbot. It can also suppliment the bulldog clips, they dont do a good job of dealing with lateral sheer force, so some of what attrubute to z wobble or ribing may actualy be bed slipage, where the glass moves slightly.

The flashforge previously had issues with bed slip even though it was supplied with gina pads under the bed which are very very thin silicone rubber pads. The larger whole bed pad completly eliminates any movement and im getting smoother sidewalls as a result. The effect may be small a few fractions of a mm at most but its visible in the output.
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Jonbot+
225mm x 200mm - Heated Bed
RAMPS 1.4 running Marlin 1.1.0
Full Graphic display.
-------------------------------
Zen Toolworks CNC/3d printer
230mmx360mm bed
Dual j-head hotends.
Dual heated beds.
RAMPS 1.4 running Marlin 0.98
-------------------------------
Flashforge 3d Creator Pro
Dual Extruder
220x143x150mm
Mightyboard rev e, runnimg Sailfish 7.7r1234
-------------------------------
Photon, self designed printed printer.
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Re: fixing glass to the bed

Postby orangefurball » 2015-Jan-Sun-16-Jan

thawkins wrote:
orangefurball wrote:Wow that's awesome, I've had a few crashed with my hotend and the bulldog clips.

How does it fare with fast movements back and forth? The ones where you feel like the printer is on the verge of shaking itself apart.

Are you using it on your simple or another printer with a bed that moves

This may solve a couple issues I've been having!


Im currently using it on a printer with a raising bed, but i have plenty of the silicone rubber, and will be putting it onto the new jonbot. It can also suppliment the bulldog clips, they dont do a good job of dealing with lateral sheer force, so some of what attrubute to z wobble or ribing may actualy be bed slipage, where the glass moves slightly.

The flashforge previously had issues with bed slip even though it was supplied with gina pads under the bed which are very very thin silicone rubber pads. The larger whole bed pad completly eliminates any movement and im getting smoother sidewalls as a result. The effect may be small a few fractions of a mm at most but its visible in the output.

I'm going to try to find some of this at a local store and do some comparisons to bulldog clips. I do have a small amount of Z wobble so maybe this will solve it. It isn't anything that effects any prints really, just makes the layers more pronounced.
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Re: fixing glass to the bed

Postby thawkins » 2015-Jan-Sun-19-Jan

Btw: pic of the chopping board and toilet roll holder filement spool holder, total cost about $2 out here.
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Jonbot+
225mm x 200mm - Heated Bed
RAMPS 1.4 running Marlin 1.1.0
Full Graphic display.
-------------------------------
Zen Toolworks CNC/3d printer
230mmx360mm bed
Dual j-head hotends.
Dual heated beds.
RAMPS 1.4 running Marlin 0.98
-------------------------------
Flashforge 3d Creator Pro
Dual Extruder
220x143x150mm
Mightyboard rev e, runnimg Sailfish 7.7r1234
-------------------------------
Photon, self designed printed printer.
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Re: fixing glass to the bed

Postby Mooselake » 2015-Jan-Mon-11-Jan

I like those UMHW cutting boards, and have cut up several of them for non-cookling projects.

Anybody in the states know a mail order source for silicone pastry mats? I'll look around here more, but haven't found anything similar in the wilds (or shops) of the arctic (-9F/-23Chere today) north on my first search.

Kirk
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Re: fixing glass to the bed

Postby thawkins » 2015-Jan-Mon-11-Jan

Mooselake wrote:I like those UMHW cutting boards, and have cut up several of them for non-cookling projects.

Anybody in the states know a mail order source for silicone pastry mats? I'll look around here more, but haven't found anything similar in the wilds (or shops) of the arctic (-9F/-23Chere today) north on my first search.

Kirk


This is what mine looks like, i have already cut out a section.

The dark marks are where it has already attached to the glass of the table top just by laying it on the top. A little pressure and it seals right down.
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Jonbot+
225mm x 200mm - Heated Bed
RAMPS 1.4 running Marlin 1.1.0
Full Graphic display.
-------------------------------
Zen Toolworks CNC/3d printer
230mmx360mm bed
Dual j-head hotends.
Dual heated beds.
RAMPS 1.4 running Marlin 0.98
-------------------------------
Flashforge 3d Creator Pro
Dual Extruder
220x143x150mm
Mightyboard rev e, runnimg Sailfish 7.7r1234
-------------------------------
Photon, self designed printed printer.
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Re: fixing glass to the bed

Postby orangefurball » 2015-Jan-Mon-19-Jan

Haven't found any on Amazon or anything. At least nothing below $40
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Re: fixing glass to the bed

Postby thawkins » 2015-Jan-Mon-20-Jan

orangefurball wrote:Haven't found any on Amazon or anything. At least nothing below $40


Hmmm, our local dollar stores have them here, they are called "japan stores" because they are loaded with cheap products from japan, and they all sell at 66 or 88 peso which is $1.50 and $2 respectivly.
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Jonbot+
225mm x 200mm - Heated Bed
RAMPS 1.4 running Marlin 1.1.0
Full Graphic display.
-------------------------------
Zen Toolworks CNC/3d printer
230mmx360mm bed
Dual j-head hotends.
Dual heated beds.
RAMPS 1.4 running Marlin 0.98
-------------------------------
Flashforge 3d Creator Pro
Dual Extruder
220x143x150mm
Mightyboard rev e, runnimg Sailfish 7.7r1234
-------------------------------
Photon, self designed printed printer.
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Re: fixing glass to the bed

Postby orangefurball » 2015-Jan-Mon-21-Jan

thawkins wrote:
orangefurball wrote:Haven't found any on Amazon or anything. At least nothing below $40


Hmmm, our local dollar stores have them here, they are called "japan stores" because they are loaded with cheap products from japan, and they all sell at 66 or 88 peso which is $1.50 and $2 respectivly.

I'll have to check out my local dollar stores then. Unfortunately the only one that was really good and had a ton of random cooking stuff closed last month due to a chain dollar store coming to town. They would have had one of these I bet. The search continues!!
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http://www.thingybot3d.com
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Re: fixing glass to the bed

Postby PxT » 2015-Jan-Mon-21-Jan

$6.60 & free shipping:
http://www.amazon.com/ZNU-Massive-Fonda ... 263&sr=8-1

And they can be found on eBay even more cheaply. Ex:
http://www.ebay.com/itm/Silicone-Rollin ... 4897.l4275
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Re: fixing glass to the bed

Postby thawkins » 2015-Jan-Tue-02-Jan

PxT wrote:$6.60 & free shipping:
http://www.amazon.com/ZNU-Massive-Fonda ... 263&sr=8-1

And they can be found on eBay even more cheaply. Ex:
http://www.ebay.com/itm/Silicone-Rollin ... 4897.l4275


That is the one, exactly the same as mine available in baby blue or the blushing pink that i have.
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Jonbot+
225mm x 200mm - Heated Bed
RAMPS 1.4 running Marlin 1.1.0
Full Graphic display.
-------------------------------
Zen Toolworks CNC/3d printer
230mmx360mm bed
Dual j-head hotends.
Dual heated beds.
RAMPS 1.4 running Marlin 0.98
-------------------------------
Flashforge 3d Creator Pro
Dual Extruder
220x143x150mm
Mightyboard rev e, runnimg Sailfish 7.7r1234
-------------------------------
Photon, self designed printed printer.
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thawkins
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Re: fixing glass to the bed

Postby Mooselake » 2015-Jan-Tue-21-Jan

Thanks! It's all in knowing what they're called. I ordered 3 blue ones off the bay for $2.65 each. The extras will make good mats to protect the moosedesk from soldering (mis)adventures :)

Kirk
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Re: fixing glass to the bed

Postby vibez » 2017-Feb-Wed-12-Feb

Out of interest,I see how the mat sticks to the glass but how do you stick the mat to the bed?
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Re: fixing glass to the bed

Postby frankv » 2017-Feb-Thu-18-Feb

Mooselake wrote:I like those UMHW cutting boards, and have cut up several of them for non-cookling projects.

Anybody in the states know a mail order source for silicone pastry mats? I'll look around here more, but haven't found anything similar in the wilds (or shops) of the arctic (-9F/-23Chere today) north on my first search.

Kirk


AliExpress: free shipping, $1.89 30*26cm https://www.aliexpress.com/item/Silicon ... 36855.html
$0.89 but is a mesh rather than solid https://www.aliexpress.com/item/24cm-Si ... 50695.html
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Re: fixing glass to the bed

Postby Mooselake » 2017-Feb-Thu-23-Feb

There's also silicone thermal mats that are large enough, and sticky so no clips. I just saw a link and description of them in the G+ 3D printing community, but it's too late to dig it out and post a link.

I tried those silicone pastry mats, and the ones I got weren't sticky enough to keep the glass in place. I went back to binder clips. It's somewhere in the archives here, a search for silicone pastry would probably find it.

Kirk
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