LHS Gantry Induction

This page is used to track Induction sessions for the Gantry CNC https://wiki.london.hackspace.org.uk/view/Gantry_CNC

This Induction is available to London Hackspace members only. You can pre-book your place below. If you have not yet joined London Hackspace, please do so before joining Induction !

Space is limited and you must reserve a place on this wiki page when a session is available - watch the Mailing List for announcements. Reserving a place is on a first-come-first-served basis, so you'll need to be quick.

If you can't attend your Induction session please remove your name from the roster.

Preparing for the session

Using a CNC requires a bit more background knowledge or learning than a laser cutter or 3d printer. You should come to the session having some knowledge of CAD and CAM concepts and have used a CAD/CAM package such as Autodesk Fusion (free, works on Windows or OSX) or other package capable of generating g-code for CNC machining. We will be happy to help with explaining concepts but depending on your previous experience there is quite a lot to learn so you will get the most out of the session and the machine if you do some independent reading / practice.

In particular before coming you should learn a bit about;

• The difference between CAD geometry files (i.e. DXF, IGES and STEP), and tool path files (i.e. G-Code)
• Cutting materials - cutter speeds and feed rates - dependent on what you want to cut. Some things (i.e. wax, modeling board) are very forgiving, while others (particularly metals) need to be just right for good results.
• Any CAM package, Fusion 360 is a good one if you are not sure. You should try generating a tool path with a particular cutter, checking the toolpath visually and by simulation if your CAM software allows it, and finally posting the G-Code to the a g-code file (i.e. .gcode extension).
• XYZ coordinate systems (on the Boxford CNC, x is left to right (+x is travelling right), y is towards / away from you (+y is travelling away from you), and z is down / up (+z is travelling up)
• Concept of finding datum of the workpiece, for instance touching off the tool in x, y and z (z is very important)
• Checking a CAM toolpath by simulating the cut, and also checking the extents of the tool path to make sure it is not going to run into any fixtures or the bed of the machine.
• Familiarise yourself with https://wiki.london.hackspace.org.uk/view/Equipment/CNC_Mill#Using_the_CNC and must have a look at https://wiki.london.hackspace.org.uk/view/Gantry_CNC

The aim of this session is to get you up and running using this particular machine so you can experiment further - depending on your previous experience with metalworking and CNC, it may take a bit of practice to do a particular job. Spare material, watching youtube tutorials, and practice sessions are highly recommended.

Next Sessions

Please use the exact name you used to join LHS, so we can check your membership.

Training is £10 and is payable at the start of the session.

You must have a LDAP account https://wiki.london.hackspace.org.uk/view/LDAP

You must have completed 3 jobs on your own on either the ShapeOko over a period of time

TBD - 4 places available (space constraints);

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