Automatic Tool Changer module for ER20 spindles - Chip guard improvements
It has been a while since my last update. For anyone new to this project, here are my previous posts about the ATC module development:
https://www.reddit.com/r/hobbycnc/comments/1robwru/update_automatic_tool_changer_v2_for_a_hobby_cnc/
https://www.reddit.com/r/hobbycnc/comments/1sjetlx/making_a_vacuum_holding_plate_using_automated/
In my last update, it became clear that the chip guard cover for the ATC modules needed some improvement. I had two main issues:
- After longer machining operations, some chips were still finding their way into the ATC modules. This was not ideal, as it could affect operation and long-term reliability.
- The cover was operated by a servo motor, which turned out to be susceptible to electromagnetic interference from the spindle.
To tackle the chip ingress problem, I have added extra guards between the modules, as well as an additional guard at the top between the steel rod and the top cover.
For the EMC issue, I replaced the servo with an air piston and a rack-and-pinion mechanism. So far, it works like a charm.
My current plan is to release the design files for the cover, so people can make one themselves if they buy the ATC modules. The current version is designed for three modules, but it should be fairly easy to modify for more modules if needed. I do not currently plan to manufacture and sell the cover myself, although that may change if there is enough interest.
More broadly, it has been a busy period for the ATC module development. There has been quite a bit of interest, which has led to many conversations, early sales, and a lot of useful feedback. I am doing my best to answer questions and provide technical support for people integrating the modules into their own machines.
I am also slowly expanding the project GitHub page with macro examples and integration notes. This is where I plan to upload the ATC cover CAD files as well, so watch this space:
https://github.com/sn3ro/ImpactATC
Finally, I have decided to name the project ImpactATC, pun very much intended :-)
As always, if you have any questions, let me know.