TL;DR:

Groovemount is okay, but it's a hangover from when 3D printers were made in sheds. They aren’t any more, so we’re offering an alternative, using screw threads. If you think this would suit your printer better you can buy one here (1.75mm, suitable for bowden or direct systems).

We’d also really like to get your feedback. Establishing a standard is not something that should be taken lightly. In order to create a healthy enduring standard we want to consult and involve the whole community.

If you want to know more about the issues with groovemount and why we’re offering a threaded alternative, read on.

What’s the problem?

Here at E3D we’ve used always used groovemount on our HotEnds as the means of attachment. It's been the standard way to mount a HotEnd on a printer since the makergear standard was introduced. When introduced, it was intended for attaching a HotEnd to a piece of laser cut wood (an application that isn’t especially common any more). It’s a method well-suited to making prototypes as it needs a minimum of skills and lathing tools, but it does have a few issues:

  • Relying on 2 parts that simply push together requires that the parts are really precisely made. Even slight variation can result in a poor fit, with heat sinks that are either hard to push into a bracket or that wobble around during printing. We do our best to avoid this by using good machinists and doing random spot checks, but it’s still an issue we’d like to eliminate completely.
  • Mounting brackets can wear down from repeated removal and replacement of the HotEnd, leading to a once well-fitting HotEnd becoming wobbly.

While these issues don’t make groovemount unusable, we think it might be time for a new approach.

Apart from anything else, it looks great.

The solution

We’ve thrown around a few ideas, but one that we’d like to take forward is a little… screwy. And by that we mean that we’ve