Search found 257 matches

by 4DThinker
Fri Nov 08, 2019 4:05 pm
Forum: Projects
Topic: Adjustable Angle Clamping Fixture
Replies: 27
Views: 28404

Re: Adjustable Angle Clamping Fixture

The stand pictured above with the truss stretchers have proven much easier to work with than the other two Probotix CNCs we have in the same room. The openings in the stretchers let me reach through them to add or remove a clamp on the jig. That simple change (from solid to perforated stretchers) wa...
by 4DThinker
Fri Nov 08, 2019 3:59 pm
Forum: Projects
Topic: Joints Anyone
Replies: 87
Views: 51264

Re: Joints Anyone

The rotary finger joint both sides:

rotary finger joint.jpg
rotary finger joint.jpg (139.29 KiB) Viewed 12 times

4D
by 4DThinker
Fri Nov 08, 2019 3:57 pm
Forum: Projects
Topic: Joints Anyone
Replies: 87
Views: 51264

Re: Joints Anyone

I came up with this rotary finger joint awhile back, but as I now have a student using it to connect a 1.25" diameter walnut dowel to an oak dowel of the same diameter for her coat rack design I thought I'd share it here.
Dowel Splice 2.jpg
Dowel Splice 2.jpg (255.73 KiB) Viewed 12 times

4D
by 4DThinker
Sat Apr 20, 2019 6:59 pm
Forum: Machine Mechanics
Topic: Y axis limit error
Replies: 1
Views: 1563

Re: Y axis limit error

I'd check the wires connected to the Y limit switches. Those are mounted under the gantry side plates. They may have worked loose from the switch terminals. Anything that causes the limit circuit to open up will throw an error. On our Nebula the X axis switches (mounted on the ends of the gantry bea...
by 4DThinker
Thu Mar 21, 2019 7:10 pm
Forum: Open Talk
Topic: Limit Switch Errors
Replies: 3
Views: 1398

Re: Limit Switch Errors

If you've had your machine awhile, the best solution is to replace the switches. Limit 0 is the X axis and those switches are on the ends of the gantry beam. I oversee three Probotix CNCs and my students have a tendency to jog the Z axis to the top before homing the machines which eventually bends/f...
by 4DThinker
Sat Feb 16, 2019 10:48 am
Forum: Projects
Topic: Adjustable Angle Clamping Fixture
Replies: 27
Views: 28404

Re: Adjustable Angle Clamping Fixture

Latest version of my jig now installed on a Comet (GX2525).
GX2525_KSU.jpg
GX2525_KSU.jpg (1.49 MiB) Viewed 3988 times

4D
by 4DThinker
Sat Dec 29, 2018 2:36 pm
Forum: Projects
Topic: Pod Organizer
Replies: 3
Views: 1071

Re: Pod Organizer

Looking good. If I drank coffee I'd be stealing your idea for myself.

4D
by 4DThinker
Sat Dec 29, 2018 2:34 pm
Forum: Projects
Topic: Mailbox Address Label
Replies: 3
Views: 1616

Re: Mailbox Address Label

Looks like a great use for cutting board blanks to me. I'll be curious to know how well they look after a few years outside. You might look into the temperature expansion/compression values of what is likely HDPE relative to the same values for the metal mailbox. Just thinking of the future.... 4D
by 4DThinker
Wed Dec 26, 2018 5:27 pm
Forum: Projects
Topic: Joints Anyone
Replies: 87
Views: 51264

Re: Joints Anyone

Thanks Hannah. After helping several students cutting mitered corner joints for a box project I woke up the following day thinking it was a shame to have essentially thrown away the mitered waste to leave a weak joint. This joint still cuts away exactly the same amount of the 45 degree end but leave...
by 4DThinker
Wed Dec 26, 2018 4:57 am
Forum: Projects
Topic: Joints Anyone
Replies: 87
Views: 51264

Re: Joints Anyone

Internal Mortise & Tenon for mitered box corners. The boards were mounted at 45 degrees on my angle jig. The same toolpath file was cut on each side. Invisible when assembled. Clamping when gluing up is easy. 4D https://1.bp.blogspot.com/-yAN_yW9GbKY/WyErGr-L7pI/AAAAAAAACvY/5fXIspVhWvUW8f1ZCPHaT...

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