The expansion board can be used as a carving machine,3DPrinter driver expansion board, a ofFourThe slot of module of the .Note that Sako does not contain A4988 drive module, need to be in the shop to buy Can be drivenFourThe road does not enter the motor, and each step motor is only required TwoindividualIOMouth, that is to say,SixindividualIOMouth can be a good management ThreeStepper motor, the use of convenient, farewell to the cumbersome.Experimental phenomena: a turn of the , pauseOneSecond, then a story circle, so the .It is worth noting that in theA4988 When the module is not plugged in, step motor connection mode is:2A, 2BFor a group (red, green),1A, 1BFor a group (blue, yellow) would like to change direction, change the location of one group can be, for example2A,and2BExchange.for And moduleIOIntroduction to the correspondence of the mouth: basic control needs of the pin, the other pin is in the engraving machine, or3DThe printer when it is used, here we do not make detailed,IOCorresponding as above.for ----------------------Expansion board8 ------------------------ (ENStepper motor driver to enable , the low level effective)7 and Z.DIR (ZAxis direction control)6 and Y.DIR (YAxis direction control)5 and X.DIR (XAxis direction control)4 conducting Z.STEP (ZAxis step control)3 conducting Y.STEP (YAxis step control)2 conducting X.STEP (XAxis step control)The following is a simple control procedures, define EN 8 / /Stepping motor to , the low level effective define X_DIR 5 //Xaxis direction control define Y_DIR 6 //yaxis direction control define Z_DIR 7 //zaxis direction control define X_STP 2 //xaxis Step control define Y_STP 3 //yaxis Step control define Z_STP 4 //zaxis Step control Board:Latest Version 30.9 compatible. GRBL ( firmware that runs on an that turns the G-code commands into stepper 37signals)Colour:redMaterial:PCBSize:about 7.7 x 6.5cmPackage Contents:2 x A4988 Driver BoardOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.