вЂњQinHeng Electronics CH341 in EPP/MEM/I2C mode, EPP/I2C adapterвЂќ is your laser cutter in this case.

Integrated Rate Matching HubД«us 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubД«us 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubД«us 003 Device 003: ID 1a86:5512 QinHeng Electronics CH341 in EPP/MEM/I2C mode, EPP/I2C adapterД«us 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Integrated Rate Matching HubД«us 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubД«us 001 Device 003: ID 8087:07da Intel Corp.Д«us 001 Device 002: ID 8087:0024 Intel Corp. Find out the usb device id of your laser cutter:Д«us 002 Device 003: ID 04f2:b34c Chicony Electronics Co., LtdД«us 002 Device 002: ID 8087:0024 Intel Corp. Plug in your laser cutter to your computerДҐ. Eventually add other users who will use the laser cutter to the groupД¤. Add your yourself to this group, replace with your unix username: Create a group for the users who are allowed to use the laser cutter:Дў. Then over to the official instructions, with my additional comments in bold and italic I used a fairly clean installation of Raspbian Stretch and, before starting ranвЂ¦ So here is my amended version of the installation instructions (which I will be sharing with in case he wants to include/amend the instructions for use on Pi). There were a couple of вЂassumedвЂ™ packages missing. I went through the procedures in the instructions and amended them slightly because I got some error messages. The most complex thing in the Linux installation instructions is adding a udev entry to help with USB permissions, so itвЂ™s really no big deal. This means that if I ever want to change anything, thereвЂ™s a fighting chance I might be able to. I was also delighted to see that K40 Whisperer is written in Python. I read the Linux installation instructions and it really didnвЂ™t look too scary. So when someone waves an вЂ open source laser cutter control package that might work on a PiвЂ under my nose, I owe it to myself to at least take a look at it. But itвЂ™s an additional faff I can do without. Oh вЂ“ and did I mention, even when you have the вЂњcut inside firstвЂќ box ticked, sometimes it will cut the perimeter first and ruin your job for you (at no extra charge)? The way round this issue is to set up the final perimeter cut in a separate layer which gets done last. My laser cutter occupies half of my workbench (until I can work out where to move it to)вЂ¦ But the fact that Les had it up and running made me think вЂњOK thatвЂ™s definitely worth a look then.вЂќ And then I thought вЂњI wonder if it runs OK on a Pi? That would be cool!вЂќ Not just cool, but really helpful too. IвЂ™d come across a page mentioning K40 Whisperer while researching K40 upgrades, but hadnвЂ™t downloaded it or tried it out so far. He described the use of K40 Whisperer by and from the screenshots I could tell he was using it in Linux. Last week, Les Pounder published a blog article here where he showed the setup they use at the Blackpool MakerSpace. IвЂ™ve had great fun doing a whole host of upgrades and improvements to it, but thatвЂ™s not what IвЂ™m focusing on today. ItвЂ™s an eminently hackable design, and while mine could cut 3mm acrylic OK вЂstraight out of the boxвЂ™, there are many things that can be done to make it better, easier to use and more user-friendly. I bought a Chinese K40-style laser cutter about three weeks ago and IвЂ™ve been spending quite a bit of time playing with it learning how best to use it.

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