3-Axis GRBL CNC stepper controller with Arduino Mega328
Description
This Is My Take On A Grbl Mega328 3-Axis Stepper Driver Board For My Cnc Mill. It Is Designed For The New Trinamic Tmc2100 Stepper Driver Chips On A Breakout Board Sold By Watterott-Electronics (Which I Really Like, Because They Are Really Cool (They Decrease The Current When The Motor Is Idle, And They Are Silent =;) Available Here [Link](Http://Www.Watterott.Com/De/Silentstepstick) ). But You Could Also Use Other Stepper-Drivers Like The Texas Instrument Drv8825 Or Pololu A4983 If You Like. * There Is Only One Power-Supply Input (24-45 Volts) And The Board Uses A Step Down Converter To Generate The 5V/3.3V Supply For The Controller. * All Inputs Are Galvanically Isolated With Opto-Couplers And A Dcdc Converter For Supplying The Secondary Side [Link]( Http://Www.Reichelt.De/Index.Html?Action=3;Article=35024;Search=Sim1-0505%20Sil4) , So No Problems With Emv Going Into Endstop Cables And Doing Funny Things To The Cnc Controller. * Atmel Mega328 Contoller With Ftdi Usb Chip On Board * Uses The Really Fantastic Grbl Firmware For Arduino On The Software Side I Use [Bcnc](Https://Github.Com/Vlachoudis/Bcnc) As G-Code Sender And Autoleveling Platform For Milling Pcbs. The Board And Schematics Where Designed With Kicad To Be On The Save Side I Have Added A Cooler For The Stepper Drivers. It Uses A Printed Duct And A 40Mm 5V Fan. Aug-29-2015 Uploaded Newest Sketchup File, With A Easier To Print Fan-Duct And A Improved Bottom And Top Enclosure Parts. I Have A Few Professional Made Pcb'S Now (Just The Bare Pcbs, No Soldered Parts), So If Somebody Is Interested In Those, Let Me Know. <Strong>Update! There Was A Stupid Mistake In The Ftdi (Usb) Section, Vcc Was Connected To 3.3V And That Caused The Usb Connection To Fail At Random Times Or Completly To Fail.</Strong> I Fixed The Pcb And Schematics.
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