Search found 356 matches

by COsurfer
Sun Aug 08, 2010 3:47 pm
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

Have you seen these parts for the Joes CNC? http://www.castcnc.com/ I think you should be able to extend the rack and pinion version to 8'? After checking some reviews I think I am on board with you. I am going to pay the $100 tonight and probably try to build this one as long as I can keep it under...
by COsurfer
Sun Aug 08, 2010 12:34 pm
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

As far as cnc. Ive been researching them quite extensively over the last 6 months. The Blacktoe kit is $3000 plus you still need to buy electronics. Which in my case I have figured about $800 for (4) steppers, Gecko g540 controller, power supplier ect. Plus maybe another $100 for odds and ends. Tha...
by COsurfer
Sun Aug 08, 2010 5:17 am
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

Thanks for the input. Iggies design has a slightly thicker tube. Great idea on welding the seams. I had thought about that but wanted to try angles first. I will give it a try and post some pics.
by COsurfer
Sat Aug 07, 2010 8:43 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Press doesn't work quite right.
Replies: 20
Views: 11384

Watch craigslist in your area for steel under the "materials" section. Used steel in my area goes for 1/2 of new and a lot of the guys who list on there have the ability to cut to your lengths. Many smaller metal fab companies have scrap beams you can pick through.
by COsurfer
Tue Aug 03, 2010 3:15 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Press doesn't work quite right.
Replies: 20
Views: 11384

From your first picture it looks like your bladder may be pushing out on your vertical rail? The bend in your bolt indicates that as well.
by COsurfer
Tue Aug 03, 2010 11:09 am
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

Deflection!

Here are some pictures of my press progress. http://farm5.static.flickr.com/4120/4857244683_dca1c135e9_m.jpg not a perfect mold but not bad for my first. http://farm5.static.flickr.com/4142/4857865900_aae677328b_m.jpg This seemed to work in stopping a small leak. I added plumbers putty under the gas...
by COsurfer
Mon Jul 26, 2010 6:24 pm
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

What epoxy are you going to use - I'm guessing you need high temp? Honestly, I havent even started looking into types of epoxy or the process. I have my head burried in designing the press and my new boards. I dont have heat blankets so I assume I will have to use a room temp type of epoxy. I order...
by COsurfer
Mon Jul 26, 2010 12:49 pm
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

Thanks! My calculations came out to a .267" deflection at 75 psi(worst case). I think the press should be ok. If not I have designed the stand it sets on to accept a couple of angle irons with all-thread if deflection becomes a problem. That way I could easily slide the angle brackets to the en...
by COsurfer
Mon Jul 26, 2010 7:01 am
Forum: Journals: Log Your Ski Building Progress
Topic: A new press is born
Replies: 92
Views: 46984

A new press is born

Thanks to all who have posted extremely valuable and detailed info on this forum. I spent many hours studying this website to come up with my press. I acquired the steel from a craigslist ad for 1/2 price. The seller even cut the steel to my specifications. http://farm5.static.flickr.com/4122/481031...
by COsurfer
Mon Jul 12, 2010 7:20 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Press Calculation verification
Replies: 4
Views: 2400

Thanks for the input. I do mean stress in the beam. If I could shake off the cob webs from my college engineering classes I could remember the yield strength of steel and deflection calculations. I am 99% sure my design is safe but thought if anyone had a spare second to verify my calcs it would mak...
by COsurfer
Sun Jul 11, 2010 2:03 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Press Calculation verification
Replies: 4
Views: 2400

Press Calculation verification

Hello, I am building my first press and was hoping someone could double check my beam deflection calcs. I came across some 6"x6"x1/4" tube steel. My design calls for 3 of the 6"x6"x 9' long on the top and 3-6"x6"x9' on the bottom. The tube steel beams will be sandw...