TAZ modular bed... metal plate sags.

A forum dedicated to the stock LulzBot TAZ 3D Printer
k7zpj
Posts: 14
Joined: Tue Nov 29, 2016 7:37 pm

Re: TAZ modular bed... metal plate sags.

Post by k7zpj » Fri Mar 16, 2018 5:03 pm

I am having the same issue of the sagging modular bed with my TAZ5.
I am hoping if enough of us contact with this issue that they may find a resolution that fixes the issue.
So if you haven't contacted them please do.

tacit_caster
Posts: 16
Joined: Mon Aug 24, 2015 9:16 am

Re: TAZ modular bed... metal plate sags.

Post by tacit_caster » Tue Mar 20, 2018 12:29 pm

kcchen_00 wrote:
Tue Mar 06, 2018 9:25 pm
Nope... Binder clips haven't been removed.

Apparently this is how the modular system is designed...
While this does look to be normal there are a few things we would like to take a look at with this bed just to be sure. If you would like to send a message to support@lulzbot.com we can take a look at this.

eobie
Posts: 8
Joined: Thu Mar 29, 2018 3:42 pm

Re: TAZ modular bed... metal plate sags.

Post by eobie » Sat Dec 29, 2018 11:14 am

And I’m having the same issue. Didn’t realize the issue until I had abs lifting that printed fine on the old bed. It’s a shame. Guess I’m off to staples to buy binder clips. I’ll be in style with the guys running cheap Chinese printers.

kcchen_00
Posts: 1695
Joined: Thu Feb 19, 2015 12:42 am

Re: TAZ modular bed... metal plate sags.

Post by kcchen_00 » Sat Dec 29, 2018 12:06 pm

eobie wrote:
Sat Dec 29, 2018 11:14 am
...binder clips. I’ll be in style with the guys running cheap Chinese printers.
Haha... Its almost as if they designed this on the Mini, and just decided to "scale" it to the larger TAZ bed. Its stupid...

The versatility is what made this system appealing. We'll have to see if a second sheet of metal (with PEI) helps... or if the silicone heat pad is too heavy for both plates.

If they wanted to make the heat bed more efficient, it can be done with a sheet of mylar bubble insulation.

k7zpj
Posts: 14
Joined: Tue Nov 29, 2016 7:37 pm

Re: TAZ modular bed... metal plate sags.

Post by k7zpj » Mon Dec 31, 2018 6:56 pm

AllenBW wrote:
Wed Mar 14, 2018 5:33 pm
ditto to this issue, on a taz5 so there's plenty of room for sag worried its affecting the bed temp being inaccurately reported :shock: (says 60 but since sensor is embedded with element... is actually far less)
On the TAZ5 you can mitigate the sag by putting 4 of the TAZ6 wiper pads between the bed plate and the heater.
See picture below. The wiper pads hold the heater up so the heater plate touches all of the glass.
Image

A true fix for this problem would be great thing for 2019.

eobie
Posts: 8
Joined: Thu Mar 29, 2018 3:42 pm

Re: TAZ modular bed... metal plate sags.

Post by eobie » Wed Jan 02, 2019 5:59 pm

kcchen_00 wrote:
Sat Dec 29, 2018 12:06 pm
eobie wrote:
Sat Dec 29, 2018 11:14 am
...binder clips. I’ll be in style with the guys running cheap Chinese printers.
Haha... Its almost as if they designed this on the Mini, and just decided to "scale" it to the larger TAZ bed. Its stupid...

The versatility is what made this system appealing. We'll have to see if a second sheet of metal (with PEI) helps... or if the silicone heat pad is too heavy for both plates.

If they wanted to make the heat bed more efficient, it can be done with a sheet of mylar bubble insulation.
Called it quits.... the reason I love amazon, is that I don't have to worry about being jerked around by support. Bought from amazon... two clicks and it's on its way back. DONE.

kcchen_00
Posts: 1695
Joined: Thu Feb 19, 2015 12:42 am

Re: TAZ modular bed... metal plate sags.

Post by kcchen_00 » Wed Jan 02, 2019 10:29 pm

Even though it sags and the binder clips make my machine look like a $500 Chinese replica... There's potential to use the modular bed to create a truly binder clip-less, removable, flexible plate.

Here's an idea:
- Neodymium magnets attached to the underside of the modular heat pad
- Thicker PEI sheets stuck to each side of a steel sheet for rigidity to overcome sag
- Magnets fasten the new metal sheet

B-Hep-Spring
Posts: 48
Joined: Fri Oct 12, 2018 11:55 am

Re: TAZ modular bed... metal plate sags.

Post by B-Hep-Spring » Sat Jan 05, 2019 11:07 am

Im in the middle of fitting the modular bed to my Taz 6, I hope I have not bought a lemon, cant send it back I purchased the parts over a couple of months when the heater finally came back into stock. have a few issues fitting the washers as previous thread explains.

bot_nick
Posts: 15
Joined: Wed Jan 17, 2018 9:24 pm

Re: TAZ modular bed... metal plate sags.

Post by bot_nick » Mon Jan 07, 2019 5:51 pm

FWIW, I have been using a cut to fit piece of carbon fiber welding blanket under my beds, both OEM and modular. It improved the temp stability and consistency across the bed with OEM and It appears to prevent sag on the modular, also. Update: I printed new corners with 1mm lower bed pads. Super easy edit in FreeCAD, the OEM v2 design has a 2mm pad, just change the pad to 1mm. Bed mounted easily and the washers are now level and you don't get the feeling that you're going to break the bed when tightening the washers.
Last edited by bot_nick on Fri Jan 11, 2019 8:57 am, edited 1 time in total.

zachah
Aleph Objects | LulzBot
Posts: 65
Joined: Mon Jul 31, 2017 9:20 am

Re: TAZ modular bed... metal plate sags.

Post by zachah » Wed Jan 09, 2019 9:04 pm

If you have some NinjaFlex available:

On the Taz 5 print this flexible standoff and place it in the center of the bed:
https://devel.lulzbot.com/TAZ/accessori ... y_support/
83d3f5836547483567d0cb31f35f40ffb665ecc9.JPG
If you've got the Taz 6 try these updated bed corners from the Quiver devel:
https://devel.lulzbot.com/TAZ/quiver/pr ... ed_corner/

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