Search found 255 matches

by northbear
Thu Jan 28, 2016 6:14 pm
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Re: Help debugging hardware gone bad!

You can connect the parts to each other, and just one of them to ground, rather than run four wires all the way. Good point! Static discharge goes right through the anodic layer. The oxide may be a great insulator, but it has pores; at the voltages of ESD, there's little difference between anodized...
by northbear
Thu Jan 28, 2016 4:45 am
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Re: Help debugging hardware gone bad!

Static, hmmmm. I do have limit switches including on the z axis where I noticed static from the vacuum so that could be possible. I am thinking to properly ground the entire machine I would need 4 wires. One to the z axis. one to the X carriage, one to the Y carriage and one for the base. Sound righ...
by northbear
Wed Jan 27, 2016 9:56 pm
Forum: Build Logs
Topic: ShapeOko inspired CNC by Northbear
Replies: 19
Views: 11700

Re: ShapeOko inspired CNC by Northbear

Replaced the breakout board which went bad. More information here: http://www.shapeoko.com/forum/viewtopic.php?f=4&t=7499
by northbear
Wed Jan 27, 2016 9:52 pm
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Re: Help debugging hardware gone bad!

I replaced the breakout board last night and now it is back up and running! Hurray! But leads me to the question: Why did it fail? My current thoughts: 1) Cheap electronics. I purchased the first board off of e-bay direct from China (buyer "goodlucksell"). It was cheap, but once I received the board...
by northbear
Wed Jan 27, 2016 3:01 pm
Forum: For Sale
Topic: Shapeoko threaded table announced (again)
Replies: 28
Views: 4097

Re: Shapeoko threaded table announced (again)

If you can find a slab of aluminum that size w/ a guaranteed flatness spec, let us know your source. http://www.mcmaster.com/#86825k25/=10us8nh Additionally, while not a limitless supply, I've bought much bigger pieces of tooling plate (still with the plastic protective film on it) as scrap at my l...
by northbear
Tue Jan 19, 2016 10:54 pm
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Re: Help debugging hardware gone bad!

Find the Y that goes the wrong way, and measure the voltage on the direction output (with respect to ground) while executing a slow, long move in one direction, then while moving in the other direction. They should be very different (about 0 V and about 5 V), but I suspect they'll be the same, beca...
by northbear
Tue Jan 19, 2016 3:53 am
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Re: Help debugging hardware gone bad!

Thanks for the quick responses guys! AnonymousPerson - I could contact them but my CNC is not an official ShapeOKO, but instead a "Shapeoko inspired" design of my own. I know the guys at Carbide are helpful but I feel it may be asking a bit too much to help me debug my own machine :lol: WillAdams - ...
by northbear
Tue Jan 19, 2016 2:49 am
Forum: Electronics
Topic: Help debugging hardware gone bad!
Replies: 16
Views: 3103

Help debugging hardware gone bad!

Looking for some help on how to best debug what I believe is some piece of hardware that went bad. I was in the middle of running a job, and then the CNC simply stopped (with the spindle on, vacuum running, but no movement in any direction.). I stopped the program which should have turned off the sp...
by northbear
Wed Dec 16, 2015 3:28 pm
Forum: Discussion
Topic: Shapeoko Machine capabilities and limitations
Replies: 59
Views: 8421

Re: Shapeoko Machine capabilities and limitations

Now, let’s look at the belt properties. The Gates data sheet lists a 1” GT2 belt to have a modulus of 18,000, and specifies proportional reduction for smaller sizes with a further 10% between ¼” and ½”. That means the 18,000 modulus becomes 4,050. To combat this, one could increase the width of the...
by northbear
Mon Oct 26, 2015 2:48 am
Forum: Discussion
Topic: Detensioning - For times when not in use?
Replies: 2
Views: 757

Re: Detensioning - For times when not in use?

I think the flat spot on the v-wheels was me (or at least I had that problem at one point). I found the issue was due to my adjusting the eccentric cams on the v-wheels so that it was too tight. Evern since I did that I have not noticed any issues. But I do place a block under the z-axis to release ...