1 mm Ahead of the Apex: Printhead Alignment on a Continuous TTO

Two things can be true at once on a TTO printer: the code still prints, and the printhead is quietly out of alignment. In continuous mode, "close enough" has a habit of loosening the mounting bracket over time — and once that happens, the printer's position drifts, and you end up chasing a fault that keeps moving.

What correct alignment looks like

In continuous applications the printhead has to be precisely aligned to the print roller. With the head down in its working position, both ends should sit at the same distance — the setup shown here reads 2.2 mm at each side. When it's right, the whole code prints evenly across the width.

When it's wrong, one end reaches the roller first. That side marks, the other comes out faint or misses entirely, and the code fades from dark to light. That fade is your first clue; the loosened bracket that follows is the more expensive one.

The two conditions

A continuous head must sit parallel to the print roller axis and perpendicular to the roller surface. Both, not either. Looking aligned from one angle proves nothing on its own.

The default position

Relative to the print roller, the printhead's standard position is 1 mm ahead of the apex. Most applications never need this touched. Where a specific setup is required, it can be adjusted under Settings → Print Settings → Continuous Configuration.

On intermittent machines, the equivalent check is contact: head and backing plate meeting across the whole surface, with the gap even through the full print stroke.

Fit the head, set the position, then run a test code. If it prints evenly edge to edge, you're done — if the fault comes back after a few shifts, check the bracket before you touch the settings again.