Roland HD1 Lite Pedal Actuator (TPU)

Pedal actuator for the Roland HD1 Lite e-kit. 

So the rubber actuator that it comes with dries out, and you can of course find replacement parts but I am hoping that TPU fares a little better. I tried different densities, 30%, 15%, as I forgot how soft the actuator needs to be. 15% works, 2-3 layers. I do find I am getting double triggers on the bass pedal, but in my DAW I just set it to ignore velocity below CC36 and this works for me (I am using Addictive Drummer as my VST). The double trigger is less noticeable in the HD1 lite module itself. You may wish to fine tune this by trying 20 infill or different types of infill. 30 and above did not work at all though. 

Be careful when you open up the pedal, remove all screws from the base and wiggle the old actuator off of the plastic post it sits on, or the post will break. Both of mine are broken (I printed new posts :) ). I prefer to open from the underside, pedal laying on the floor, this means the spring doesn't fly off as it can be tricky to re-assemble (especially if you want to iterate). Be wary of the thin ribbon cable that connects to the pad sensor and jack. I haven't broken one yet but it seems flimsy. If you are not sure how to take this apart there are many videos on YouTube. 

The print profile has support painting / blocking. I printed different iterations all with the same support generation and the bridging worked fine.