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Getting a Deep Mark With Your Pin Marker


July 22, 2019


Getting a deep mark with a pin marker is ideal for thick metals and marking materials that will be post-processed. For example, let’s say you’re marking a part that will later be painted over. If your mark is too thin and/or shallow, the paint may obscure the mark if not completely cover it up. You’ll want to make a deeper, thicker mark to avoid that.

Deep mark setting

So let’s go back to the three components of pin marking that we talked about previously: the stylus tip, force, and speed. For a deeper, wider mark, we’ll use:

  • – A stylus tip that that has a broad angle. At SCHMIDT, we call this our Heavy Duty stylus.
  • – A good amount of force. Start with whatever is recommended for your stylus. Ours will be set at 80 PSI.
  • – A mark speed of 1400 steps per second.

We’re going to test this on a steel plate. After making the deep mark with the Heavy Duty stylus, we’re going to make the same mark with our #1 stylus, which has a thin, high-angle tip. Before we demo these marks though, let’s take a quick look at these two different styluses.

Stylus comparison

SCHMIDT Deep Mark stylus base

In this image, compare the size of each pin’s base. The base is the part of the pin that gets pushed down by air pressure while you’re marking. You’ll notice that the Heavy Duty stylus’s base on the left has a much bigger diameter. When air pressure is applied, a lot of force is generated because there’s a large surface area for the air pressure to push against.

On the other hand, the base of the #1 stylus is much smaller. When air pressure is applied, only some of it pushes against the base, effectively creating less force. So even though we’ll be running both styluses at the same PSI, the Heavy Duty stylus is actually going to generate more force than the #1 stylus.

Next, here’s a comparison of the stylus tips. You can see that the tip of the #1 stylus on the right is thinner than the Heavy Duty stylus tip. As a result, the mark made with the #1 stylus will be thinner as well.

SCHMIDT Deep Mark Stylus Tips

Deep mark demo

Below is a picture of the two marks. The Heavy Duty stylus (left mark) clearly made a more visible mark. You can tell that not only is it wider due to the width of the tip but it’s also much deeper because it had a greater force behind it.

SCHMIDT Deep Mark Heavy vs Light

Now as I mentioned before, deep marks are great if there’s going to be some kind of post processing on the part after marking. So we painted over the marks and as you can see, the mark made with the heavy duty stylus (left) is still visible. However, the second is very hard to see because it’s thinner and not as deep. In fact, some of the paint was removed from that mark and the image color was adjusted just to make the mark visible. 

SCHMIDT Deep Mark Post Process Comparison

This was just a very brief overview of the different kinds of marks you can make with a pin marker, how to achieve those marks, and the kind of applications you would use those marks for. For more information on pin marking and specific marking applications, contact your local SCHMIDT representative.