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Maximum number of hot ends for RAMPS

Posted by Pawan 
Maximum number of hot ends for RAMPS
March 06, 2016 12:35PM
What are the maximum number of hot end heater cartridge+thermistor pairs that can be run using RAMPS? Can the bed heating ports also be used for a cartridge+thermistor pair?
Re: Maximum number of hot ends for RAMPS
March 06, 2016 02:31PM
You can have 3 heaters on a Ramps. The heated bed can be used for heating a hotend. However, Ramps only supports 2 stepper drivers for extrudes natively. You would have to wire up a 3rd stepper driver to use a 3rd hotend.


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Re: Maximum number of hot ends for RAMPS
March 07, 2016 03:20AM
The stepper expander can expand upto three additional steppers. So can I have three additional cartridge+thermistor pairs using free pins?
Re: Maximum number of hot ends for RAMPS
March 07, 2016 10:44AM
Not to get too off-topic, but can you do a master/slave set-up with a RAMPS? I know you can for a Melzi, but I've never seen it done for a RAMPS.


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Re: Maximum number of hot ends for RAMPS
March 19, 2016 02:28PM
I have 4 extruder 4x( stepper, therm, heater) and bed. Add in aux2, aux1.

Edited 1 time(s). Last edit at 03/19/2016 02:29PM by Letaw.
Re: Maximum number of hot ends for RAMPS
April 10, 2016 08:32PM
Quote
Letaw
I have 4 extruder 4x( stepper, therm, heater) and bed. Add in aux2, aux1.

What do you mean by "Add in aux2, aux1" ?
Re: Maximum number of hot ends for RAMPS
April 10, 2016 09:10PM
Quote
gmh39
Not to get too off-topic, but can you do a master/slave set-up with a RAMPS? I know you can for a Melzi, but I've never seen it done for a RAMPS.
Yes you can. I use I2c in a master/slave set up. I am using a mini pro as a slave to run a set of servo's for a project I am working on.
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