MarlinFirmware/Marlin

[FR] Dual zone heated bed support

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#4,112 opened on Jun 21, 2016

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C: TemperaturesT: Feature Requestgood first issuehelp wanted

Description

Hi there,

I'm working with a new Dual Zone Heatbed, it can be controlled via the RAMPS, however i want to be able to read each Zone's Temp independently, is it a huge task to add Support for another Heatbed ##Therm input? I was going to just register it as another Hotend, but ideally want it to be displayed as a second heatbed on the Full Graphics LCD.

Thanks

Alex

Contributor guide

Tech stack
cpp
Domain
backend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Marlin firmware structurethermistor configurationLCD display code
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
This feature request asks for dual zone heated bed support, requiring additional thermistor input and display as a second heatbed on the LCD. Research should focus on how thermistors are currently read and configured in Temperature.cpp and how the full graphics LCD (e.g., UltiLCD2 or similar) displays heatbed info. The issue comments may contain user suggestions or code snippets. Look for existing patterns like multiple extruder thermistors to model the second bed sensor, and consider adding a new configuration option for dual zone beds.