As promised, the video of the roughing + finish operation on the finderscope-ring drilling jig.
Last weekend we made some rings for mounting a finderscope on the main telescope. Today I got the holes drilled and tapped so the rings are ready to use. The gallery below shows the adaptive pocketing paths that were used to cut both the part and the jig that allowed drilling the holes at +/- [...]
Jari shot some videos during the milling of the beaver-tail bulb. They now appear on YouTube. For a mostly home-built cnc minimill of this size, this is pretty 'hard core' stuff...
As a first serious test-run for our now servo-controlled cnc mill we decided to make an IOM bulb out of steel. It ends up a bit bigger in volume when made out of steel compared to lead, but the difference isn't huge. Making it with a cnc mill allows designing almost any reasonable 3D shape [...]
Got the XYZ servos mounted and tuned. The first video shows a test program with some drilling G-codes. Rapids are set at 5000mm/min with around 400 mm/s^2 accelerations. Following errors stay below 0.02 mm. The second video shows a 40 mm face-mill at 3000 rpm cutting a 20 mm wide aluminium bar with 1 mm [...]
Mounted a servo on the x-axis of the mill today and did some PID tuning. The video shows a ca 300mm rapid move at 5500mm/min (217 IPM). Below some hal-scope views of what's going on in the PID loop during the move. Here only P-gain is used and the machine needs to lag behind the [...]
Filed in CNC
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Also tagged PID
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EMC uses 'nist-logic' for most IO, meaning there is one on-switch/signal to switch a thing on, one off-switch/signal to switch it off, and one indicator-signal to tell you the state. To connect momentary-on pushbuttons to EMC you need at least the toggle component, but I've found that it doesn't work that great with things that [...]
Sunday, September 9, 2007
For testing the servo-drives and all the electronics I found this test-panel for the HOSTMOT-4 conifiguration of the m5i20 quite useful. It uses an XML file (iotest.xml) to define the pyVCP panel layout, and then a HAL file (pyiotest.hal) to hook up the IO pins of the m5i20 to the panel. I'm also using a [...]
Stuart Stevenson wrote about his Dah-Lih EMC2 conversion on the emc-mailinglist, and has allowed me to publish these pictures of his mill. I've scaled the pictures to 1024 pixels wide - click the picture to see it in high-resolution. Machine after conversion. Machine before conversion. Pendant has original CRT and buttons. Control electronics. Jon Elson's [...]
Filed in EMC
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Also tagged CNC
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Maybe the most popular GUI for EMC is called AXIS. It shows a number of useful buttons, the 3D view, G-code file view etc. But depending on machine configuration and hardware, users might want to display different things on the screen and have customized controls. There's been some previous work on virtual control panels, or [...]