Finding Zero: Aligning One Tool to Align the System

The idea behind my Zero Point system is straightforward: if I can align one tool, I’ve aligned them all.

That depends on making the tools around consistent interfaces. Each tool needs to fit the system, rather than require its own approach to finding center.

A few of my custom dies use 16 mm retention knobs to locate directly on the Zero Point plate. But most of the tooling I engineer and make uses my rounded-corner, 1-inch square shank.

So that was where I started.

Bringing the top and bottom together

I wanted to align my 1-inch square bottom tool holder with the ram above it. In my Zero Point setup, that also meant aligning it with the specialty tool holder installed in the ram.

There are two parts to that alignment.

The first is centering the bottom holder beneath the ram. The second is establishing its angular orientation.

Centering alone isn’t enough. A slot punch and its die need to face the same direction. So do a matching pair of top and bottom fullering tools.

I wanted a way to establish both position and angle together, then carry that alignment forward as I changed tools.

A tool that connects the holders

My alignment and indexing tool has a 1-inch round upper shank with a machined flat that indexes with the top tool holder.

The lower section has the same rounded-corner, 1-inch square profile I use for my bottom tooling. It slides into the square bottom tool holder.

That makes the alignment device a connection between the two holders. Rather than judging their relationship by eye, I can bring them into alignment through the fit of a single tool.

I made it for a sliding fit. When it slides into the matching holder, that fit gives me confidence that the top and bottom are aligned.

It is also a substantial tool, easy to handle and work with during setup. I wanted something straightforward to use, not another fiddly part of the process.

Establishing alignment, then keeping it

The alignment tool establishes the relationship between the top holder and the bottom holder or base plate. The Zero Point system lets me return compatible tooling to that established position.

Those are different jobs, but they work together.

Once the setup is aligned, I can move from a slot punch to a top and bottom fuller setup without starting the alignment process over. The tooling is made around the same interfaces, so the position and orientation carry through.

That is what I mean by aligning one tool to align the system. It isn’t a claim that any tool will automatically line up. It comes from engineering and making the tools to work together.

Useful beyond my Zero Point setup

This approach can also help blacksmiths align a suitable Hardie bottom holder or base plate beneath their ram, even without my Zero Point system.

There is an important fit distinction, though.

My bottom tool holder has rounded internal corners. Many conventional Hardie tools have square-cornered shanks, so their nominal 1-inch size does not mean they will fit my holder.

In the other direction, the rounded corners on my alignment tool can fit within a square-cornered opening, provided the opening’s dimensions and fit are suitable.

That gives the tool a use beyond my own bottom holder, without making it a universal fit for every Hardie setup.

A setup tool, not a working tool

The alignment and indexing tool is not hardened or tempered. Its job is to establish position and orientation during setup.

It is not a punch or a forming tool, and it is not intended for pressing, forging, or impact loads.

Once alignment is established and the setup is secured, it has done its job.

Less setup between tools

The Zero Point plate gave me a way to return bottom tooling to a known position. The dedicated holders gave me consistent interfaces above and below.

The alignment tool connects those ideas.

Instead of treating each tool change as a separate alignment problem, I can establish the relationship once and build my tooling around it.

That leaves less setup between one operation and the next, and more time using the press.

In this video, I explain how I align the bottom tool holder and base plate.