Search found 273 matches

by dbarrans
Sat Feb 20, 2016 10:48 am
Forum: Show us your machine!
Topic: Alan Z's evolving machine
Replies: 16
Views: 10958

Re: Alan Z's evolving machine

http://www.geckotek3d.com" onclick="window.open(this.href);return false;
by dbarrans
Mon Feb 15, 2016 11:34 pm
Forum: What are YOU making?
Topic: E3D Hotend, Light ring, and Makerhive Quick Change board
Replies: 16
Views: 12270

Re: E3D Hotend, Light ring, and Makerhive Quick Change board

Another vote for written instructions. Videos are great to see how things are put together, but when I'm putting something together myself it's much easier if I can jump around and reread sections at my own pace. This is best for finding and referring to something later also.

- dan
by dbarrans
Thu Jan 07, 2016 2:15 pm
Forum: Mods and Upgrades
Topic: new carriages and ball arms
Replies: 9
Views: 6893

Re: new carriages and ball arms

Since I built my printer, several things have changed that affect geometry and tuning. Among them are: * number of teeth on the belt drive sprockets. * number of microsteps (?) (my RAMBo is v1.0). * radius and arm length (I have the latest carriages, arms, and effector). * I want my control knob to ...
by dbarrans
Thu Jan 07, 2016 12:08 pm
Forum: Mods and Upgrades
Topic: new carriages and ball arms
Replies: 9
Views: 6893

Re: new carriages and ball arms

With the new carriages, the end stop screws are very short (3/8") with very little leeway for adjustment. I don't see how these instructions are feasible.

- dan
by dbarrans
Thu Jan 07, 2016 11:37 am
Forum: Mods and Upgrades
Topic: new carriages and ball arms
Replies: 9
Views: 6893

Re: new carriages and ball arms

Which manual is that excerpt from?

- dan
by dbarrans
Thu Jan 07, 2016 4:10 am
Forum: Mods and Upgrades
Topic: new carriages and ball arms
Replies: 9
Views: 6893

new carriages and ball arms

I installed new carriages and ball arms from seemecnc on my RMax v1, and I know I need to change the arm length to 290.8, but I think I also need to change the delta radius. When I move the effector horizontally, it gets lower as it moves further from the center of the build plate. Anyone know what ...
by dbarrans
Tue Jan 05, 2016 12:34 am
Forum: What are YOU making?
Topic: Aluminum and carbon fiber E3d V6 mount. RELEASED!
Replies: 389
Views: 196673

Re: Aluminum and carbon fiber E3d V6 mount. RELEASED!

Looking forward to getting my mount in a few days. If you haven't run across it yet, http://www.vacuumsealerbags.com" onclick="window.open(this.href);return false; is a good source for less expensive bags.

- dan
by dbarrans
Fri May 02, 2014 10:32 pm
Forum: Rostock MAX
Topic: Heavy-duty push-fit connectors?
Replies: 29
Views: 21030

Re: Heavy-duty push-fit connectors?

I wonder if we could somehow take a PTFE washer with an ID matching the tubing OD, and glue or weld the washer near the end of the tubing. Then we could make a fitting that just clamps the tubing end in place, at least until the weld fails.

- dan
by dbarrans
Tue Mar 25, 2014 4:34 pm
Forum: The Lounge
Topic: RotoMAAK rotational Casting
Replies: 41
Views: 22660

Re: RotoMAAK rotational Casting

Is the RotoMAAK open source? I want to make one that's round instead of square so it'll look like the machine in Contact. :-)

- dan
by dbarrans
Fri Mar 21, 2014 1:21 pm
Forum: The Lounge
Topic: RotoMAAK rotational Casting
Replies: 41
Views: 22660

Re: RotoMAAK rotational Casting

Who's going to be the first to use this for chocolate rabbits?

- dan
by dbarrans
Mon Feb 10, 2014 11:41 pm
Forum: Rostock MAX
Topic: Xnaron Printable Magnetic u-joint option for Rostock Max
Replies: 474
Views: 566607

Re: Xnaron Printable Magnetic u-joint option for Rostock Max

I thought about that also, but I don't think two cups could be small enough for enough freedom of movement while being large enough to stay seated.

- dan
by dbarrans
Mon Feb 10, 2014 10:11 pm
Forum: Rostock MAX
Topic: Xnaron Printable Magnetic u-joint option for Rostock Max
Replies: 474
Views: 566607

Re: Xnaron Printable Magnetic u-joint option for Rostock Max

Yeah, if someone was selling some 1/2" magnetic steel balls with 8-32 threaded holes , I'd certainly be interested in buying. I've already blown away more time and money than I wanted to trying to do this myself.

- dan
by dbarrans
Mon Feb 10, 2014 10:08 pm
Forum: Rostock MAX
Topic: Xnaron Printable Magnetic u-joint option for Rostock Max
Replies: 474
Views: 566607

Re: Xnaron Printable Magnetic u-joint option for Rostock Max

I tried pressing some 8-32 studs into #25 holes drilled in ball bearings, but I wasn't really happy with how it sheared the threads off the studs. I ended up with a slightly bent stud and some sharp curly bits sticking out.

(did I just say that out loud?)

- dan
by dbarrans
Mon Jan 27, 2014 8:20 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

Michael, I tried again this weekend with a #27 bit. Got a hole drilled, then succeeded only in dulling the taper tap you suggested. Oh well. I decided to abandon the idea of tapping the holes, and drilled 12 balls with a #25 bit. Seems to be just about the right size to let me press-fit some 8-32 st...
by dbarrans
Mon Jan 20, 2014 10:53 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

Interesting. I just got around to measuring, and it seems my #25 bit is .149" in diameter, but I drilled a hole .167" in diameter with it, which is larger than the 8-32 studs I have, which are .158". I guess the only thing left is to order another tap set and another #25 carbide bit. ...
by dbarrans
Mon Jan 20, 2014 10:27 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

I tried a #25 drill bit, but that made a hole too big. The #29 is the recommended size for 8-32 threads, and I calculated the #25 was to the #29 as your oversize #31 was to a #36 for 6-32 threads. Either I got that wromg. or maybe I had the #25 slightly off center, making a larger hole than it would...
by dbarrans
Sun Jan 19, 2014 11:39 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

The balls are C60. The tap is for C30-C40. I'm pretty sure that's my problem.

- dan
by dbarrans
Sun Jan 19, 2014 11:22 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

I barely had it start to bite for cutting threads. I'm certain it was my technique, but I don't really know what I could have done differently. It wasn't cutting at all, so I put a bit more pressure towards the hole. Then it started cutting and caught and released a few times, then it broke. Before ...
by dbarrans
Sun Jan 19, 2014 7:09 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

Michael, how did you avoid breaking your tap? I broke my #25 carbide bit on Wednesday, most likely because the drill chuck on the turret wasn't quite lined up with the collet chuck on the headstock. Before the bit broke, it drilled a hole too large for an 8-32 tap. I got another carbide bit, this ti...
by dbarrans
Thu Jan 16, 2014 1:12 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

I tried drilling holes in 1/2" ball bearings last night, using a straight flute carbide bit, and chipped the bit on the first one. :-( Just as well, because a #25 is apparently too large for the 8-32 tap. Going to try again this weekend with a spot drill and a #29. I was surprised at the nice m...
by dbarrans
Tue Jan 14, 2014 10:48 am
Forum: What are YOU making?
Topic: ~$2000 gamble....
Replies: 10
Views: 7516

Re: ~$2000 gamble....

What's worse is most of the time the wings aren't even moving in the same *direction* as the fuselage. :-)

- dan
by dbarrans
Sun Jan 12, 2014 11:45 am
Forum: The Lounge
Topic: Vacation tips for an european pair
Replies: 16
Views: 10019

Re: Vacation tips for an european pair

For classic cars, All Roads Lead to Hershey. Sorry, it's in October, not September. http://www.hersheyaaca.org" onclick="window.open(this.href);return false;

- dan
by dbarrans
Sat Jan 11, 2014 7:03 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

Well, I moved here, but not recently. Been here almost 20 years. Yes, NextFab is in Philly, about an hour away from me.

- dan
by dbarrans
Sat Jan 11, 2014 6:28 pm
Forum: The Build Zone
Topic: Mhackney's Rostock Max
Replies: 816
Views: 438526

Re: Mhackney's Rostock Max

OK, you talked me into it. I'll give it a try if I get down to NextFab tomorrow. The collet stop we have is 3/8 I think, so that should work fine for 1/2" balls.

- dan

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