The moving scare has died down, so I decided it was time to rebuild my printer with the upgrades mentioned in a previous post. ACCOMMODATING Z Axis mounts UpdateUpon installing the Z axis mounts with a distFromFrame value of 65mm, I found that I had managed to cut my build volume in half. I drastically over-estimated the clearance required to keep the part cooling fan from catching on the frame, so now when the Y axis is fully extended forward, the the print head is only at the bed's halfway point. This means that my new build volume is 210x113mm instead of 210x210mm, as the entire rear half of the print bed is unreachable by the hot end. Luckily, this is still more than enough space to print new Z axis mounts. I used calipers on the current setup to determine a new distFromFrame value, and I came up with 48mm. I probably won't regain all of my lost build volume, but this new offset should give me a much more workable space. I've updated the Accommodating Z Axis design documentation post to match this value. IR Z Probe troublesOne of the upgrades I got was a "MINI DIFFERENTIAL IR HEIGHT SENSOR," a small PCB with infra-red LEDs that can detect its distance from a surface with accuracy. This makes it useful for homing the Z axis and compensating for any unintentional tilt in the build surface. I tried using it for my printer, but I'm not convinced that the mount I've put it on is stiff enough for repeatable results. The readings are not consistent with the actual height of the nozzle. It's a complicated problem, but I'm working through it.
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Jacob mitchellI like to play computer games, program, and try my hand at 3D printing. Archives
February 2017
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