Search found 135 matches

by potatotron
Wed Mar 27, 2013 7:05 pm
Forum: Discussion
Topic: molex connectors & alternatives?
Replies: 13
Views: 3165

Re: molex connectors & alternatives?

I used Molex connectors on my first Shapeoko (my pick and place machine) and they're fine, but yes more work to disconnect than I'd like. I'm using XLRs for the new mill I'm building, I got them here:

http://www.aquickcnc.com/store/electron ... ction-set/
by potatotron
Wed Mar 27, 2013 5:19 pm
Forum: Design Ideas
Topic: Is this thing even a Shapeoko anymore?
Replies: 42
Views: 14693

Re: Is this thing even a Shapeoko anymore?

IC - when you build / rebuild your mill do you square up & align the frame pieces each time, or do you readjust after everything is together, or both?

Also did you get your spacers from McMaster? Are you using aluminum, stainless, etc.?
by potatotron
Sat Mar 02, 2013 1:21 am
Forum: Design Ideas
Topic: Carbon Fiber Plates and Aluminum Bearing Blocks
Replies: 23
Views: 7770

Re: Carbon Fiber Plates and Aluminum Bearing Blocks

Very impressive. Can't wait to see it in action.
by potatotron
Sat Jan 19, 2013 6:59 pm
Forum: GRBL
Topic: Trouble uploading GRBL 0.8 HEX
Replies: 13
Views: 3804

Re: Trouble uploading GRBL 0.8 HEX

Connect the Duemilanove to the Uno like "Circuit (targeting Arduino Uno, Duemilanove, or Diecimila)" in http://arduino.cc/en/Tutorial/ArduinoISP Then run this sketch on the Duemilanove: https://github.com/WestfW/OptiLoader This will flash the Uno (OptiBoot) bootloader to the Uno. You can open the Se...
by potatotron
Sat Jan 19, 2013 4:49 pm
Forum: GRBL
Topic: Trouble uploading GRBL 0.8 HEX
Replies: 13
Views: 3804

Re: Trouble uploading GRBL 0.8 HEX

I'm not familiar with JTAG programmers. Can you get it to speak the STK500 protocol? If so you can probably make avrdude reprogram your Arduino with it.

Good luck!
by potatotron
Tue Jan 15, 2013 3:58 am
Forum: Electronics
Topic: Easy to source wire to connect board and motors?
Replies: 6
Views: 2156

Re: Easy to source wire to connect board and motors?

I'm still curious if some other cable which people are likely to have floating around could be re-purposed for this (phone wire? old ethernet cables?). Typical Cat5 (Ethernet) cable is 24 gauge, which can carry about .6 amps. Since it has 4 pairs you could double up the wires and get 1.2 amps, enou...
by potatotron
Mon Jan 14, 2013 4:28 am
Forum: Electronics
Topic: Easy to source wire to connect board and motors?
Replies: 6
Views: 2156

Re: Easy to source wire to connect board and motors?

Go to the bulk cable section of Home Depot (somewhere in the electrical section - it sort of looks like a ferris wheel of cable spools). Find some 4 or more stranded conductor cable of 20 gauge or lower, call an attendant and have them cut you off however much you need. I think I got 15 feet of 7 co...
by potatotron
Sun Jan 13, 2013 7:40 pm
Forum: Electronics
Topic: Which electronics to use
Replies: 21
Views: 4945

Re: Which electronics to use

cvoinescu: I calculated 2.8 amps by multiplying three motor's 1.7amps and I saw in grblShield's features 2.5 amps; are motors winding all together? so all three need 2.8amps at once. thats where I am confused; Where does 2.8 come from? 3 x 1.7 = 5.1. In any event, the grblShield can drive 2.5 amps ...
by potatotron
Sat Jan 12, 2013 6:14 pm
Forum: Electronics
Topic: Which electronics to use
Replies: 21
Views: 4945

Re: Which electronics to use

Hello, Please forgive me for asking noob question, If arduino has support of GCodes via additional libraries, why one needs grblshield with stepper drivers? why we just cant connect stepper drivers to arduino directly? You certainly can. This is how I've made both my CNC mill and my ShapeOko pick a...
by potatotron
Thu Jan 10, 2013 4:29 pm
Forum: GRBL
Topic: Adding limit switches.
Replies: 17
Views: 7624

Re: Adding limit switches.

During homing cycle (and assuming, the cycle move toward the home switch everytime), the CNC will home at the center, perfect. But now that I have a home switch in the middle of my area, will this act as limit switch during actual milling ? As far as I understand yes. So whenever the CNC is aligned...