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by boltz
Sun Apr 15, 2012 9:30 pm
Forum: Group Projects
Topic: Open Source DLP 3d Printer
Replies: 21
Views: 11831

Re: Open Source DLP 3d Printer

Great application for a harmonic drive. They can give you 100:1 reduction in a compact package with zero backlash. With that many incremental moves settling time could be a big factor in overall speed.

-Jim Hart
by boltz
Sun Apr 15, 2012 12:20 pm
Forum: Group Projects
Topic: Open Source DLP 3d Printer
Replies: 21
Views: 11831

Re: Open Source DLP 3d Printer

I clicked on the indiegogo link and the first link below the video took me to Junior Veloso's blog, where he shows those impressive prints, and that's where I found the quote about the expensive resin, in one of his FAQ's. If you can get prints like that from $40 a quart resin that have some useful ...
by boltz
Sat Apr 14, 2012 2:01 pm
Forum: Group Projects
Topic: Open Source DLP 3d Printer
Replies: 21
Views: 11831

Re: Open Source DLP 3d Printer

from the FAQ on the blog: Q: How much cost the resins? A: The resin cost is quite high at this moment because of the volume, over 350 per litter. We truly believe that this can go down once the volume increases, this means we need big number of people using the technology to have good price for the ...
by boltz
Mon Mar 26, 2012 9:28 am
Forum: Uses/Equipment
Topic: Curtis Air Compressor (AKA The Big Pickle)
Replies: 23
Views: 14109

Re: Curtis Air Compressor (AKA The Big Pickle)

Adam, not exactly. What you described was operation with continuous unloader without pressure switch. What I described was dual control.

-Jim Hart
by boltz
Fri Mar 23, 2012 12:42 pm
Forum: Uses/Equipment
Topic: Curtis Air Compressor (AKA The Big Pickle)
Replies: 23
Views: 14109

Re: Curtis Air Compressor (AKA The Big Pickle)

Generally there is a manual valve to select between continuous and intermittent, If Curtis doesn't have one it would be a worthwhile addition. It's just a valve which turns the unloader on and off. The unloader is set for a lower pressure than the pressure switch, so when you close the valve and dis...
by boltz
Wed Mar 21, 2012 11:24 am
Forum: Uses/Equipment
Topic: Curtis Air Compressor (AKA The Big Pickle)
Replies: 23
Views: 14109

Re: Curtis Air Compressor (AKA The Big Pickle)

Latching is kind of irrelevant. It goes when the pressure switch tells it to go, and stops when the pressure switch signals that the required pressure has been attained. The only thing you can really screw up when wiring a compressor is the heaters. You have to check the chart to make sure they are ...
by boltz
Fri Feb 03, 2012 9:55 am
Forum: General Discussion
Topic: Bridgeport Mill - in the house
Replies: 2
Views: 1198

Re: Bridgeport Mill - in the house

People working around it need to know that it can throw smoking hot chips up to 10 feet from the cutting tool. OSHA requires safety glasses with side shields for the operator and nearby personnel. Regular eyeglasses don't qualify. It can be hard to express the importance of this upon somebody who ha...
by boltz
Wed Dec 07, 2011 4:57 pm
Forum: General Discussion
Topic: portable n64
Replies: 4
Views: 1722

Re: portable n64

It looks like the thick, textured paint might be structural.

-Jim Hart
by boltz
Fri Nov 18, 2011 12:47 pm
Forum: Off Topic
Topic: B1TCalc
Replies: 13
Views: 7643

Re: B1TCalc

I'm diggin' the 7seg display, can you do one that looks like nixie tubes?

-Jim Hart
by boltz
Fri Nov 18, 2011 10:37 am
Forum: General Discussion
Topic: how to move a bridgeport into your basement
Replies: 0
Views: 1678

how to move a bridgeport into your basement

HOW TO MOVE A BRIDGEPORT INTO YOUR BASEMENT I think it was the image of the Bridgeport on a homebuilt trailer made of two by sixes and lag screws and hitched up to a Toyota that really endeared me to this page. Only a man with a heart of stone could be unmoved by the sight of The Little Red Tercel ...

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