Janome 5270QDC Instruction Book page 68

Use the stitch pattern 00 (blank space) in mode 5 if you
wish to insert a space between stitch patterns.
w Blank space
Pattern 98 (Mode 5)
Pattern 99 (Mode 5)
Pattern 00 (Mode 5)
w
NOTE:
The space can be varied from 0.5 to 5.0 by adjusting
its stitch length.
66
Spaces (Default stitch length)
2.5 mm
3.5 mm
5 mm