1 Topic by PaulHilgeman

  • PaulHilgeman
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Topic: Davinci RAMPS Conversion - Bed Thermistor

Hi Everyone,

This forum has been very helpful getting me started with my RAMPS conversion.

I have a fully operational RAMPS conversion for my Davinci 1.0a, that had a burned out motor driver. 

However, I am unable to get the bed temperature control to work.  I have followed most guides and have my hot end thermistor wired to T0 on the RAMPS board.  I am then wiring the thermistor on the bed to T1 on the RAMPS board.

I first started with the stock thermistor, and tried several of the thermistor options in the config.h file.  I always had an error that didnt allow me to run the printer, so for the past two days I have had that line commented out:

#define TEMP_SENSOR_0 5  // Closest match to the Da Vinci Thermistor with Beta = 4380
//#define TEMP_SENSOR_1 0
//#define TEMP_SENSOR_2 0
//#define TEMP_SENSOR_3 0
//#define TEMP_SENSOR_BED 1 //NTC Honeywell 100k Thermistor Beta = 3974

I figured it had something to do with the stock thermistor so I ordered some of these:

https://www.amazon.com/Iverntech-Thermi … Marlin+NTC

I am still not getting any sensible readings back from it, I have checked all wiring with a DMM and everything.

Is there any troubleshooting method so that I can see if the board is actually just reading the NTC correctly, or is there a way to assign it to T2 instead to see if that works?

Thanks!

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
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Re: Davinci RAMPS Conversion - Bed Thermistor

When I converted mine I just used a standard thermistor. The glass bulb type. I used a Dremel and made a channel in the plastic support under the glass and an indentation to accommodate the glass bulb so it just made contact with the glass. That way I could use the standard thermistor in Marlin since there is no good choice for the stock one.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by yizhou.he

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Re: Davinci RAMPS Conversion - Bed Thermistor

Without detail description of the error message, it is hard to tell what is the problem. but try the following setting and let me know what error message you got.

If use NTC Honeywell 100k Thermistor,
#define TEMP_SENSOR_BED 7

if use Iverntech NTC 3950 100k Thermistor
#define TEMP_SENSOR_BED 11

(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1

4 Reply by PaulHilgeman

  • PaulHilgeman
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Re: Davinci RAMPS Conversion - Bed Thermistor

Yeah, I think the problem is that my arduino board is not measuring anything on the D1 input. 

I have tried both of those above definitions for my bed temp input. 

In all of those cases, I receive an error on the LCD display "BED TEMP ERROR" or similar.  Not sure where to look in repetier to see what the actual reading is.

I have tried moving the extruder NTC over to T1 and it too gets me nothing, so I truly believe it is the input into the board and I need to remap it to T2 if possible.

However, this is my first build and I am open to suggestions!

Thanks guys.

5 Reply by yizhou.he

  • yizhou.he
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Re: Davinci RAMPS Conversion - Bed Thermistor

What happen if you move bed thermostat to T0?

The setting to switch to T2 is in pin.h

(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1

6 Reply by PaulHilgeman

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Re: Davinci RAMPS Conversion - Bed Thermistor

I think I found it in the pins.h file for the RAMPS 1.4. 

It worked!

Thanks for all of the help guys!