TAZ Heatbed: Use 85C not 110C

A forum dedicated to the stock LulzBot TAZ 3D Printer
jebba
Site Admin
Posts: 689
Joined: Mon Mar 25, 2013 4:11 pm

TAZ Heatbed: Use 85C not 110C

Post by jebba » Mon Jun 17, 2013 8:33 am

The TAZ only needs 85C for the heatbed, not 110C. We are updating the next print of the manual, and have included an errata. FYI.

michael.whitley
Posts: 48
Joined: Tue May 21, 2013 10:11 pm

Re: TAZ Heatbed: Use 85C not 110C

Post by michael.whitley » Mon Jun 17, 2013 11:50 am

Is this for ABS?

User avatar
Orias
Aleph Objects | LulzBot
Posts: 1509
Joined: Wed Mar 27, 2013 1:24 pm
Location: US

Re: TAZ Heatbed: Use 85C not 110C

Post by Orias » Mon Jun 17, 2013 12:49 pm

Yes, set the bed to 85C for ABS.

1013
Posts: 339
Joined: Thu May 23, 2013 9:56 am

Re: TAZ Heatbed: Use 85C not 110C

Post by 1013 » Wed Jun 19, 2013 6:29 am

Will the firmware be updated too?

I can't find the TAZ firmware on your site, but in the TK-0 firmware Configuration.h file it calls out:
"#define ABS_PREHEAT_HPB_TEMP 100"
http://devel.lulzbot.com/TK-0/software/ ... guration.h

I think this is only the default that is pulled up in printrun, but it should probably be changed too.

jebba
Site Admin
Posts: 689
Joined: Mon Mar 25, 2013 4:11 pm

Re: TAZ Heatbed: Use 85C not 110C

Post by jebba » Wed Jun 19, 2013 7:54 am


User avatar
Orias
Aleph Objects | LulzBot
Posts: 1509
Joined: Wed Mar 27, 2013 1:24 pm
Location: US

Re: TAZ Heatbed: Use 85C not 110C

Post by Orias » Wed Jun 19, 2013 7:56 am

The line you mentioned around line 341 is only used when using an optional LCD controller kit.

davidwood
Posts: 27
Joined: Sat Jun 29, 2013 6:24 am

Re: TAZ Heatbed: Use 85C not 110C

Post by davidwood » Mon Jul 08, 2013 4:42 pm

I'm curious - why the change? I actually have problems with curling and adhesion at 85; at 100-110, they are reduced.

rohan
Posts: 14
Joined: Tue Jun 04, 2013 2:41 pm

Re: TAZ Heatbed: Use 85C not 110C

Post by rohan » Tue Aug 06, 2013 10:50 pm

Well mainly it because the 110C setting was used for the AO-101's and the TAZ, having a different bed has a different setting of 85C. (It should have always been 85C for the TAZ in the manual, but we did not see the error until after they manuals were printed...sigh)That the simple answer, in reality the temperature on the top surface of the PET that is on the glass should be similar between the AO-101 and the TAZ even thought they are "set" differently. This is due to mainly different temperature sensor locations and the different materials that make up each bed have different thermal properties.

The reason we don't suggest going higher than 85C, even if it can help sometimes with warping and pealing, is that it can discolor ABS if it is too warm. This is really noticeable with natural ABS as it will start to turn brown if it sits for to long on an bed that is too warm.

davidwood
Posts: 27
Joined: Sat Jun 29, 2013 6:24 am

Re: TAZ Heatbed: Use 85C not 110C

Post by davidwood » Fri Aug 09, 2013 1:35 pm

Very interesting. Thank you for your reply. I have not seen any discoloration yet. I definitely don't want to use any more heat than needed - I'll keep trying to print with less as much as I can.

I am curious - if I measure the surface temperature of the bed on the Taz with i.e. an IR thermometer, while it's set to a reference temperature like 85C or 110C, is there a number you would expect the actual surface temperature to be?

BCEngineering
Posts: 5
Joined: Thu Dec 12, 2013 2:58 pm

Re: TAZ Heatbed: Use 85C not 110C

Post by BCEngineering » Thu Dec 12, 2013 3:04 pm

I have noticed the discoloration of the natural ABS, but only on very long prints (10-12 hours+) at 110 C.

At 85C, I have a lot of problems getting the parts to adhere to the surface, even with ABS / Acetone glue.

Now I have a different problem with running at the higher temps: The bed isn't able to get above ~95C now. I wonder if this is because I have been over taxing the system running at the higher temps?

Post Reply