kraken extruder build!!!! Help!! February 28, 2020 02:57AM |
Registered: 5 years ago Posts: 18 |
Re: kraken extruder build!!!! Help!! February 28, 2020 03:36AM |
Admin Registered: 13 years ago Posts: 7,008 |
Re: kraken extruder build!!!! Help!! February 28, 2020 04:00AM |
Registered: 5 years ago Posts: 18 |
Quote
Dust
Yes you can do this
You just wire the pins that would normally go to the mega on the second ramps to the various exp pins on the first ramps.. Its ugly, but will work.
No there is no manual to do this. Its not for the novice
You need to start with a list of what you want.
how many stepper driver (7)
how many software controlled fans (2?)
how many hotends (4)
heated bed (1)
thermister inputs (bed + hotends)
ramp provides 3 MOSFETS, and 5 stepper driver and 3 thermistor inputs
So two ramps boards will be fine.
now you need to work out how many signals you need
Each additional stepper driver needs step, direction and enable pins (more if you use SPI or UART stepper drivers)
Each additional MOSFET need a IO pin that is capable of hardware PWM (these are limited)
Each additional thermistor needs an Analog input. (these are limited)
So the next step it to work out where you would wire each of these components that satisfy their requirements to the current ramps
You will need this.
NB you cannot use D0 or D1, these are actually tx0/rx0 which is connected to your USB interface.
PWM is on pins 2 to 13 and 44 to 46