Search found 226 matches

by veng1
Mon Aug 24, 2015 3:40 pm
Forum: CAM Help
Topic: EXACT point of zero XY
Replies: 8
Views: 1908

Re: EXACT point of zero XY

Another option is to use a microscope with a known offset from the spindle center. Drill a hole with the smallest bit you have available, note the co-ordinates of the hole, then carefully move the centering scope to line up with the hole that was drilled and then subtract the co-ordinates to get the...
by veng1
Thu Aug 20, 2015 2:53 pm
Forum: Shapeoko 3 Assembly
Topic: Nyloc fasteners
Replies: 11
Views: 1881

Re: Nyloc fasteners

Because Nylock nuts have, well, nylon added, they are taller than standard nuts. The square nuts fit into an extrusion and as best I could tell have to be the exact ones supplied with the kit. I just used thread locker on those. Because the Nylocks are taller, you may want to get longer screws also....
by veng1
Thu Aug 20, 2015 2:43 pm
Forum: Discussion
Topic: Homing switches kit for a shapeoko 2
Replies: 4
Views: 723

Re: Homing switches kit for a shapeoko 2

I got some 3D printed holders for switches from Kbot3d and installed them. Mostly they work but the Z home has the unfortunate failing that if one is not paying close attention and manually raises the Z axis then it is possible to rip the switch right off the mount. I've done that a couple of times....
by veng1
Thu Aug 20, 2015 2:22 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19747

Re: i/o shield for limit switches, user buttons and controls

In thinking about this further, I believe the reason I don't have any noise problems is because my limit switches are wired "Normally Closed".

I suspect that if the switches are wired that way and the internal pulls are enabled, there is no reason for optoisolators.
by veng1
Wed Aug 19, 2015 1:36 pm
Forum: Discussion
Topic: i/o shield for limit switches, user buttons and controls
Replies: 55
Views: 19747

Re: i/o shield for limit switches, user buttons and controls

I could design a new board and get it built if there is significant interest. I would use optoisolators that have built in Schmitt triggers and probably would not do it as a shield so it would work for any control board. Rather, I envision a terminal strip for the inputs and a terminal strip for the...
by veng1
Thu Aug 13, 2015 4:22 pm
Forum: 3D Printing
Topic: Printrbot Simple Metal
Replies: 8
Views: 2468

Re: Printrbot Simple Metal

I've not liked the designs I've seen for Shapeoko limit switches nor 611 air diverters as they either seemed overly complicated or missing features that I wanted so I designed my own and printed them on this same printer. I've also printed models of custom aluminum extrusions to show customers, so t...
by veng1
Thu Aug 13, 2015 4:04 pm
Forum: Shapeoko 3 Assembly
Topic: Alternate SO3 Z Limit Switch Mount
Replies: 6
Views: 1540

Re: Alternate SO3 Z Limit Switch Mount

My first option WAS to make a bridge between the two standoffs. Then I put a bow in it to allow room for the router. Finally, I realized with the forces involved screwing that big #10-24 screw and washer to hold that tiny little screw that it was way overkill and designed one to go on just one side....
by veng1
Thu Aug 13, 2015 2:34 pm
Forum: Discussion
Topic: Offset and combine multiple G Code files?
Replies: 7
Views: 1063

Re: Offset and combine multiple G Code files?

Here's a real hack but I think it will work for 2D for cutting plywood. Cura is open source and allows one to place multiple models on the build platform, move them around and rotate in three axes. It also allows one to import g code. I have tried moving and rotating a g code file as I haven't neede...
by veng1
Thu Aug 13, 2015 2:23 pm
Forum: Software - CAD, CAM, Workflow Help
Topic: Can you adjust Gcode by using registration marks?
Replies: 7
Views: 1107

Re: Can you adjust Gcode by using registration marks?

There is a camera plugin for Mach3 that will center but I don't know if it will compensate for skew. The macro capability would allow it to be written though. As @cvoinescu said, pick and place machines compensate using cameras. Common practice is to use 3 fiducials (registration marks). People have...
by veng1
Thu Aug 13, 2015 2:04 pm
Forum: 3D Printing
Topic: Printrbot Simple Metal
Replies: 8
Views: 2468

Re: Printrbot Simple Metal

I needed a printer for a project like "right now" so I went to MicroCenter and picked one up. An hour or two later I was up and running. I previously bought a MendleMax kit but had nothing but trouble although that was several years ago and I'm sure the kits have improved. I'm not recommending again...