Cut paper at the right distance

cut_paper.sh

@@ -2,4 +2,5 @@
 set -e
 dev=/dev/usb/lp0
 
-printf '\x1DVA\0' > $dev
+# Cut paper at about 15mm, the distance between the cutter and the printer
+printf '\x1DVA\xc8' > $dev

print_barcode.sh

@@ -1,3 +1,4 @@
 #!/bin/bash
 
 printf '\x1Dk\x05'$1'\0' > /dev/usb/lp0
+./cut_paper.sh

print_image.sh

@@ -20,7 +20,11 @@ printf '\x1B@' > $dev
 
 # Set print speed
 printf '\x1D(K\2\0' > $dev
-printf '22' > $dev
+printf '21' > $dev
+
+# Set head energizing
+printf '\x1D(K\2\0' > $dev
+printf 'a4' > $dev  # 0-4, or \x80 for automatic, default=0
 
 # Upload graphics data
 printf '\x1D(L' > $dev
@@ -37,5 +41,4 @@ printf '\x1D(L\2\0' > $dev
 printf '02' > $dev
 
 # Cut paper
-printf '\n\n\n' > $dev
-printf '\x1DVA\0' > $dev
+./cut_paper.sh