The Wino-board is very interesting for IoT home projects. It is an Arduino tiny board including Wifi interface.
The pitch of the connectors is 2mm to optimize the footprint. But this is not so easy to use with 2.54mm pitch common breadboards. So, I have designed a small adapter to convert from 2mm to 2.54mm pitch.
Here is the PCB machined on my CNC-6040. The label is not finished because the mill broke during the engraving.
The fully assembled adapter board with the Wino-board device soldered on the top.
After trying to implement auto bed leveling feature with a retractable switch, I decided to use a small induction sensor. I experienced poor mechanical reliability with the retractable switch mostly because the PLA bracket was melting when the 2 extruders were hot.
I have modified the original hot end holder design by Ultimaker so that a support plate for the induction sensor can be tightly screwed.
Here is the original design compared to the new one
The induction sensor is a TL-Q5MC1-Z from Omron. Even it is rated for 10 to 30 VDC power supply, it works very well down to 2.5V, including the embedded red LED indicator. The detection distance of the aluminum plate is about 2mm. So I have replaced the 3mm glass plate by kapton tape to accommodate this short detection range.
The sensor is connected to GND, +5V and Pin13 of the Ultimaker controller board so that the ZMIN endstop switch is still active. Keeping the ZMIN endstop is useful for security reason in situation where the induction sensor does not work anymore, or the aluminum bed is not present.
TL-Q5MC1-Z connection (brown, blue, black wires)
I have modified the Marlin firmware as below:
Activation of the 3 points bed leveling feature
Optimization of G28 and G29 sequences
Support of a sensor connected to the Pin 13 of the controller board
BobCAD-CAM is able to manage multiple machine setups in the same project. This is a very useful feature when the workpiece should be cut in several phases with a different fixture for each of them. Below an example with 3 machine setups.
The generated G-Code file contains all operations in the same file, except if you enable manually only one fixture. So, saving one different G-Code file for each machine setup is possible, but quite painful and risky.
To solve this issue, I have designed a custom BobCAD-CAM postprocessor and a dedicated LinuxCNC/Gmoccapy panel to select from one single G-Code file the operations to be executed for a given machine setup. Also, the Gremlin preview is automatically updated according to the selected machine setup. Here is a video showing how it works:
In the BobCAD-CAM generated G-Code file, the section associated to each machine setup is surrounded by if / elseif / endif statements for dynamic selection.
The #<_selected_setup> is a custom named parameter linked to a Gmoccapy panel where the setup number can be selected from 1 to 6.
For those who are not using Gmoccapy or LinuxCNC, another option is to get the chosen machine setup by reading an analog input with a M66 statement.
I have spent some hours to configure properly my BobCAD-CAM postprocessor for good result. One tricky aspect is the tools management: if the tool does not change from one machine setup to the next one, the original postprocessor does not include any further tool change statements in the G-Code file. This is not compatible with my O100 if/elseif/endif hack because, the tool change sequence would be issued only for first machine setup. So, I have added a systematic tool change in the following section of the posprocessor:
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I have added a nice Jason HK heated bed to my Ultimaker Original. The cables are guided by a nice cable chain and remixed clips. See following links to get the STL files for you own printer: https://www.youmagine.com/designs/heat-bed-wire-clip-for-um-original-remix http://www.thingiverse.com/thing:247573
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