Help with CNC Shield 3.0 and TeaCup Help me please, I decided to build mini 3D printer using old DVD drives, Arduino UNO and CNC Shield v3.0. I need to know how to connect heater and thermistor(hotend) to this board. Some people says on forum that I must to use free analog pins and config them in TeaCup firmware. Can you explain me how to do this?Also i whant to understand how to cinfig extruder drive.I found information that I need to set jumpers in D12-D13 switch. Then axis A will work how independ.So i need to enderstand how to config extruder too. Thanks all who will help me!:) https://reprap.org/forum/read.php?4,851425,851425#msg-851425 Mon, 10 Aug 2026 12:52:18 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?4,851425,890023#msg-890023 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,890023#msg-890023 Lord_Deysel Reprappers Sat, 23 Jul 2022 17:45:55 -0400 https://reprap.org/forum/read.php?4,851425,851448#msg-851448 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851448#msg-851448
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Dust
NB before you power on. You need to set the vref voltage on your stepper drivers. This needs to be set very low or you will burn out the cd stepper motors.
already done!))]]> evgeniy.romensky Reprappers Wed, 17 Apr 2019 08:04:48 -0400 https://reprap.org/forum/read.php?4,851425,851446#msg-851446 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851446#msg-851446 Dust Reprappers Wed, 17 Apr 2019 07:58:34 -0400 https://reprap.org/forum/read.php?4,851425,851444#msg-851444 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851444#msg-851444 evgeniy.romensky Reprappers Wed, 17 Apr 2019 07:48:42 -0400 https://reprap.org/forum/read.php?4,851425,851443#msg-851443 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851443#msg-851443
Arduino-Uno-Pin-Diagram.png


Thermistor is on "resume" this is ardunio pin A2 so AI02 in teacup
Hotend is on "CoolEn" this is arduino A3 (D17 when used as a digital pin), DIO17 in teacup
]]> Dust Reprappers Wed, 17 Apr 2019 07:47:02 -0400 https://reprap.org/forum/read.php?4,851425,851440#msg-851440 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851440#msg-851440
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Dust
looks good. The red rectangle is the hotend, represented as a resister.
Yes, it is :))
So, one more step left- in config.py i need just choose pins for heater and thermistor,like AI02, and its should be work?]]> evgeniy.romensky Reprappers Wed, 17 Apr 2019 07:37:15 -0400 https://reprap.org/forum/read.php?4,851425,851439#msg-851439 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851439#msg-851439 Dust Reprappers Wed, 17 Apr 2019 07:33:53 -0400 https://reprap.org/forum/read.php?4,851425,851438#msg-851438 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851438#msg-851438 evgeniy.romensky Reprappers Wed, 17 Apr 2019 07:28:46 -0400 https://reprap.org/forum/read.php?4,851425,851437#msg-851437 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851437#msg-851437 Dust Reprappers Wed, 17 Apr 2019 07:25:51 -0400 https://reprap.org/forum/read.php?4,851425,851436#msg-851436 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851436#msg-851436 evgeniy.romensky Reprappers Wed, 17 Apr 2019 07:21:31 -0400 https://reprap.org/forum/read.php?4,851425,851435#msg-851435 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851435#msg-851435
relays are loud.
relays often weld themselves to one position due to sparking welding the contacts together.
relays dont last long in this application.

raw relays also need a driver board... or the back emf kills the IO pin.]]> Dust Reprappers Wed, 17 Apr 2019 07:05:53 -0400 https://reprap.org/forum/read.php?4,851425,851433#msg-851433 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851433#msg-851433 evgeniy.romensky Reprappers Wed, 17 Apr 2019 06:57:02 -0400 https://reprap.org/forum/read.php?4,851425,851432#msg-851432 Re: Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851432#msg-851432
The thermistor needs to be connected to an Analog in via a few components

This is the circuit from a ramps, you need to replicate 1/3 of this diagram (its for 3 thermistors)
The thermistor is plugged into the top, pins 1 and 2, Therm0 goes to the Analog input pin


The hot end needs to be controlled from a IO pin that ideally does PWM.
This is connected to MOSFET which actually turn the 12v heater on and off.
Here are some circuits...


The A axis..
This is the board

On the left middle is the setting for the A stepper
A.stp and A.dir go up the middle, you put two jumpers on the bottom row. this connects A.stp to D12 and A.dir to D13


As for which pins you can use...

A0 through A5 are usable (but A4-A5 are not easy to get to) NB all analog pins can be reconfigured as digital outs
]]> Dust Reprappers Wed, 17 Apr 2019 06:38:32 -0400 https://reprap.org/forum/read.php?4,851425,851425#msg-851425 Help with CNC Shield 3.0 and TeaCup https://reprap.org/forum/read.php?4,851425,851425#msg-851425 I need to know how to connect heater and thermistor(hotend) to this board. Some people says on forum that I must to use free analog pins and config them in TeaCup firmware. Can you explain me how to do this?Also i whant to understand how to cinfig extruder drive.I found information that I need to set jumpers in D12-D13 switch. Then axis A will work how independ.So i need to enderstand how to config extruder too.



Thanks all who will help me!:)]]> evgeniy.romensky Reprappers Wed, 17 Apr 2019 05:46:52 -0400