Updated Build-Cost Tally: Cost so far: 1) Two 26in Slide Assemblies: $130 (Ebay) 2) DeWalt DW618 Router: $168 (Check Froogle) 3) One IKO Linear-Rail (Z-Axis): $15 (Ebay) 4) Framing: - - A) 80/20 Aluminum Structure - 47" 1515 x 2: $33 (Ebay) - - B) 80/20 Aluminum Structure - 36" 1020 x 3: $36 (Ebay) - - C) 80/20 Aluminum Structure - 36" 1530 x 4: $102 (Ebay) - - D) 80/20 - Double T-Nut - #3279 - x 60pcs: $45 (Ebay) - - - - I went a bit overboard on the T-Nuts. 5) 8in Ballscrew for Z-Axis: FREE! 6) CNC4PC Breakout Board, PSU, Charge Pump: $67 (CNC4PC Website) 7) Poly-Sci DC Servos with US-Digital Encoders x3: $321 (Ebay - HomeCNC) 8) Aluminum Plate - Assorted - For End-Plates and Z-Axis: $150 (Metal Supermarkets) Total: $1067 Budget Max: $2000 Left to Spend: $933
Wow this looks great, keep those photos coming, id love to have a cnc machine as well, but their just too darn expensive.
Javadog, I live in Ohio, but can make it up to buffalo (or ship). Can I use your services when you're done with this beast? By the way, looks great!!!
The nice USPS man dropped of my Servos last night. They are gorgeous! I also went to Metal Supermarkets this morning. Not super cheap...but they had what I needed. I haggled the **** out of them, I think they were ready to kill me. Booty: Qty 2: 1/4" x 25" x 10" Qty 1: 3/8" x 12.5" x 8" Qty 1: 3/8" x ? x ? and a whole bunch of scrap. Damage: $150 (Updated the tally) Total of 44lbs - works out to $3.40/lb.
I drew up some quick & rough designs for the frame. End-plates are .25" 6061. Top parts of the frome are 80/20 1515. Bottom parts of the frame are 80/20 1530.
Ok, more pictures coming soon. I've been working on the power supply. It's a bit tricky...the output is going to be 36vac and 20amps! Needless to say, I am taking my time and being careful not to make myself crispy.
With that much output, you’ll be more than crispy… LOL Looking forward to more updates. Your doing a great job!
Dude I have worked with dual 110v lines with 36amp fuses, now i know that can kill me, but the voltage your working with will give you a numb arm at best... Unless your standing in a pool of water in your driveway or taking a shower with the psu while sprinkilng salt.
Well, either way - I am going to do my best NOT to zap myself. I've done it before, and it really hurts!! I am actually going to be running two transformers in parallel. I found some nice inexpensive transformers from MJPA. They aren't toroidal, which are more efficient, but other CNCers have used these with great results.
these transformers your talking about where did you get them an do they come in 12-15v variations? Im looking to run a 320w pelt so i need lots of amperage. and how cheep are we talking about here?
The ones I got were 12-0-12 VAC and 20amp. So, you can get 24vac @ 20a from them. They were from MPJA and were only $17.99USD. This is the one I chose.
Wow those are nicely priced. Ofcourse the provide ac curent though so I will need to make a circuit to transfer to DC curent so it can be used on pelts. Thanks for the link JavaDog
I believe a half wave bridge would work for ya jaguarking, though that is a lot of current (at prolly around 14v or so, you know how ac-dc conversion isn't always 1:1). Building your own custom (low quality) power supply isn't that hard, I built a 300w 12v supply with 3 components (transformer, bridge rectifier, and a bigass cap) which works pretty well (powers a car amp). It runs around 14v or so (could run around 18-20 by using the alternate winding ) Cool beans!
Yup, that is exactly what mine is going to be. Two transformers in par, a bridge rectifier, and two 37,000uf caps in par. If you take the AC voltage (in my case 24vac) and multiply that times 1.414 you will get a general feel for the VDC. So, in my case 24vac * 1.414 = 34vdc. I had a lot of help building this PSU, and since it is pretty high-current, if you aren't familiar - GET HELP! THe big capacitors are dangerous too, if you feed them AC or wire the polarity wrong, they will explode with considerable force. So, you are warned!
