Setting Tool Parking Positions
This is a WORK IN PROGRESS and the instructions will be updated soon. Use this procedure at your own risk.
This is a basic procedure to manually dial in parking post locations for tool on Jubilee. Please note that tool pickup and drop-off moves should be “Manhattan” style (a big negative move in the Y-axis until you’re completely clear of any tools and parking posts, then a move in the X-axis) to avoid collisions with other tools or parking posts.
What You’ll Need
- A fully functional printer tool lock and motion system (ie it homes and moves properly in X, Y, Z, and tool lock axes, and all lock/unlock/tpost/tfree macros and files have been updated to work for your machine)
- A fully assembled tool post, with the required fasteners/tee-nuts to attach it to the X-axis frame member
What To Do
- Power up your printer, and home all axes.
- Take your parking post assembly and loosely fasten it to the rail approximately where you want it; you should still be able to move the parking post around to adjust it for X-axis position and parking post height.
- Move your build plate down in the Z-axis (positive Z values) such that any tools you’re about to mount will fully clear the bed. Usually a value of Z50 or more is enough for this.
- Jog the carriage to somewhere close to the center of the printer bed.
- With tool T-1 selected (no active tool), manually place your tool against the lock carriage, and lock the tool onto the carriage using the tool lock macro (Do not select a tool using the Tx commands - this is critical)
- Jog the carriage to roughly where you want to end up across the X-axis. Eyeball it, or use a measuring tape/ruler if you want to.
- Jog the carriage forward in the Y-axis until its just in front of the parking post assembly, making sure you don’t engage the parking dowel pins just yet.
- Line up the parking post on the rail to the tool across the X-axis.
- Slowly jog the carriage forward in the Y-axis until the tool starts engaging the parking dowel pins.
- Take a look to make sure everything is lined up: dowel pins, parking wings, etc.
- Jog the carriage further in the Y-axis in small (1mm) increments until you’ve achieved a full dock. Depending on your tool mount, you may or may not have the tool actually touching the front of the extrusion that holds the parking posts.
- Adjust the position in the X-axis to your liking using the steppers (not by hand, we don’t want to lose position).
- Once your tool and parking post are fully engaged and in the final position you want them to be, take a note of the X and Y values reported for the printer’s current position in the web interface. This will be needed for the tpost and tfree macros for this specific tool and parking position.
- Tighten down the tee-nuts to lock in your X-axis position for this tool.
- Adjust your parking post height adjustment until you’re satisfied that the tool is properly supported and parallel to the Y-axis rails of your printer. Tighten down the screws for the height adjustment to lock it in.
- Unlock the tool from the carriage using the tool unlock macro (and not using a T-1 or Tx command).
- Jog the now-decoupled carriage backwards in the Y-axis direction until it fully clears your tool(s) and parking post(s). Take a note of this value of the Y-axis position from the web interface, as this will be close to your final choice of “Tool Clearance Limit” for all of your tfree files.
- Update the relevant tpost and tfree files for the tool you have just set up. Make sure you’re always clearing tools in Y-axis movements first within tfree (the value of the Y-axis you reached in step 15 above) before the carriage performs any X-axis movements. You’ll also need to check that you’re fully clearing tools in the Y-axis with a tool actually locked on to the carriage (this value will change per tool, and also depends on the other tools mounted to your printer’s parking posts - you have to tailor this to your build).
- Try out a tool change to the new parking post using the Tx command. Test both selecting a tool and parking it. While testing, check to see if your setup needs a few tweaks to make sure the lock pin fully engages the ramp (change the Y-axis value used in tpost - higher Y values move the locking carriage closer to the tool dock) upon locking. Check to see if the tool has been docked correctly after unlocking (change the Y-axis values in tfree to adjust this to your needs).