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(SOLVED) Generating thermistor tables.

konwiddak

(SOLVED) Generating thermistor tables.
January 29, 2013 05:22AM

Registered: 11 years ago
Posts: 251

I am trying to generate a thermistor table for my bed to increase accuracy using table generator

I am stumped with the r1 and r2 values, are these a function of the thermistor or my electronics? I have all the other values. I am running Sanguinolou 1.3a.

Edited 1 time(s). Last edit at 01/29/2013 09:03AM by konwiddak.

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rhmorrison

Re: Generating thermistor tables.
January 29, 2013 06:50AM

Registered: 14 years ago
Posts: 3,742

Quote
konwiddak
I am stumped with the r1 and r2 values, are these a function of the thermistor or my electronics?

The electronics...

See Measuring temperature the easy way and More accurate thermistor tables .

Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

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konwiddak

Re: Generating thermistor tables.
January 29, 2013 06:57AM

Registered: 11 years ago
Posts: 251

Excellent, thanks, that's a good read! I now understand what R1 and R2 are.

However I am still no closer to working out what their values are! Presumably they are the same on all Sanguinololu boards (roughly), does anyone know what they are? smiling smiley

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rhmorrison

Re: Generating thermistor tables.
January 29, 2013 07:31AM

Registered: 14 years ago
Posts: 3,742

How about the Sanguinololu page in the wiki! eye popping smiley

Specifically the SCHEMATIC is of interest!!

Q.E.D. R1 = 4.7 k Ω, R2 = ∞ Ω

Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

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Attachments:
open | download - Thermistors.png (39.3 KB)

konwiddak

Re: Generating thermistor tables.
January 29, 2013 07:58AM

Registered: 11 years ago
Posts: 251

Brilliant thanks, I did look at the wiki, but I didn't notice the schematic!

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rhmorrison

Re: Generating thermistor tables.
January 29, 2013 08:18AM

Registered: 14 years ago
Posts: 3,742

Bob Morrison
Wörth am Rhein, Germany
"Luke, use the source!"
BLOG - PHOTOS - Thingiverse

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Attachments:
open | download - SanguinololuIndex.png (256.7 KB)

konwiddak

Re: (SOLVED) Generating thermistor tables.
January 29, 2013 10:38AM

Registered: 11 years ago
Posts: 251

I looked at the wiki page before asking for help, without knowledge of what R1 and R2 are looking at a schematic is meaningless so I didn't search for one. I apologise that after a helpful answer I asked a brief follow on question which took you seconds to answer. I am a terrible person.