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DANGER WILL ROBINSON DANGER Dedicated ground outlet

April 23, 2017, 1:19 pm
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@grumpa wrote:

I am standing up and declaring that I am wrong and could be DEAD wrong with my previous "advice" about my dedicated ground circuit. In my posts about electrical circuits and/or poorman's enclosure I described how I built a dedicated ground circuit. Now I stand on the purpose of this ground circuit because it provides a separate place to ground the machine's frame, the vacuum hose and even a wrist strap if I was so stupid, all back to the same ground. The outlet has each pole wired to the ground of the outlet so there is absolutely no electricity available to that outlet. But I just realized how dangerous that could be. I never planned on unplugging that ground plug which has a bare ground wire form the frame and the vacuum hose to each prong connecting each bare wire to a bare wire within the socket itself. I had to unplug it to move the machine out of the enclosure to work on it (maintenance). Now what will happen IF I plug that ground only plug into the wrong outlet. I will be DEAD wrong. DO NOT SET UP OR MAKE A DEDICATED GROUND CIRCUIT. Sorry for shouting but maybe I need to hear it also. I am still going to use my dedicated ground circuit but I am immediately going to hom depo to get a dryer plug and outlet for that purpose that is absolutely different from ANY other plug in my workshop. I DO NOT RECOMMEND THIS TO ANYONE!!! I may have been certified to design an electrical design for an entire city a long time ago but WOW was I wrong here. I hate social media and this is only one of two forums I belong to because of stupid advice anyone can give and not be responsible for. I respect the members of this forum and even though this may decline my respect from those experienced CNC machinists I know declaring this error is more important. It may be better that any reply from a noobie be background colored in yellow for caution sacks. Anyways BE CAREFUL about how you read advice. I am sorry. I no longer feel I should give advice or opinion on other than woodworking which I'll probably keep to myself. That's the other problem with social media, you can get carried away talking (not meaning to but) and sounding like you are an expert and some poor sole will take your advice and get hurt. To paraphrase one highly respected member here "put a fork in me, I'm done...."

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Cutting Along X Axis vs Y Axis is So Loud

April 23, 2017, 2:15 pm
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@rcar1046 wrote:

All other things being equal, does someone with more experience than me know why cutting along the Y axis would be buttery smooth...or quiet at least, yet along the X screeching and loud?

This video surfacing brass shows what I mean. And particularly along the top.

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Preview job limits

April 23, 2017, 2:36 pm
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@Rick wrote:

How about an option, maybe on thr jog screen, to preview thd job limits. The machine would raise to a safe height then move to the four corners of the job limits with a short pause at each corner. That would give us a chance to make sure that the stock is appropriate for the job. It may also let us know if any holddowns that should be outside of the cutting area are where they should be.

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Issues after re-flashing GRBL 0.9

April 23, 2017, 5:00 pm
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@dmckee55 wrote:

Hello everyone,

I briefly tried GRBL 1.1 and Carbide Motion 4 today, but ended up reverting back to GRBL 0.9 and Carbide Motion 4. After re-flashing, the machine is not usable... It will not even complete a homing sequence. I was wondering if someone would share the .hex file and EEPROM file (if needed) for me to use. I have tried the hex file located at the link below:

http://carbide3d.com/files/grbl.hex

When the machine starts a homing sequence, the stepper motors have a nice harmonic noise associated with the rate of movement which is very slow. Almost like the steps per mm is incorrect. It will home the Z axis first, then the X axis which crashes into the side of the machine. I am at a loss on this one... Any help is much appreciated.

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Z Axis Plate idler pulley & belt problem Shapeoko XL

April 23, 2017, 5:38 pm
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@Zoomer wrote:

<img src="/uploads/default/original/2X/f/fead0e36275df082e084d5134f60bce298d2ba0f.jpg" width="640" height="427"
I have had my Shapeoko XL for about two months and all has been well. I was running a job this afternoon when it became apparent the Z Axis Plate became frozen in place. When I disassembled the mechanism I discovered one of the two set screws on the idler pulley had vibrated loose (see picture) and jammed the gear from turning, making a loud clicking sound (not a belt skipping sound). It appears that the set screw had little or no LocTite on the thread.
1. Can someone please explain the function of those set screws. If you tighten them down, they lock the pulley against the mounting bolt also preventing it from turning.
2. Now even more curious, the belt will not bypass itself because the bushings appear to be pinching the belt too tightly together. I don't have a clue why this is since it is threaded exactly as the instructions indicate and it was working well before this incident..
3. Also, the loose set screw scored the vertical track on the left side. I was able to smooth it out somewhat with steel wool, but hopefully the factory can send me a replacement.
Your thoughts and suggestions on issues 1 & 2 would be greatly appreciated.
Thank you!
Don Sieburg

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Cutting HDPE faster

April 24, 2017, 3:02 pm
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@Amanda wrote:

Hello!
I have been machining relatively large parts out of HDPE on my Nomad 883 pro. I have been using the recommended settings for HDPE and using Mesh Cam
DOC- .02"
RPM-6250
Feed-80
Plunge-21
.125 ball cutter
Each part takes hours to complete. Are there settings I can change to speed things up a bit without sacrificing too much quality? Or should I just be more patient?
Thanks,
Amanda

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I would appreciate fresh eyes

April 24, 2017, 3:07 pm
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@macweenie wrote:

This is just a tiny insignificant project but has been causing me a major pain in the posterior. It is just a small box for my DWP611 collet collection (Elaire and Shapeoko) and should be fairly straight forward BUT this is my Nth iteration because I have had nothing but trouble with the V-carving paths on the lid OR if those all work, with the V-carving paths for the labels under the collets. The Problem with the file posted is the "W" in "DeWalt" - it just wont accept a path.

To explain what I have done the "DeWalt" logo was downloaded from the internet as an ,svg file taken into Inkscape, added "DWP Collets" text underneath, then applied trace shape to it. I took it into Carbide Create 3 (Why not 4? Still waiting for the GRBL 1.1 installer that was promised (I had a lot of problems with the board when I received my Shapeoko and am reluctant to mess with it now that it is actually working)). From there I created the pockets, labels, etc. but try as I might I cant get ALL of the V-carve elements to make a path. Like I said before this is the last of multiple attempts - some missing the "W", some missing the "6 mm" or the "5/16"" (which is why they are now text elements within CC instead of traced shapes).

Can I substitute a Text "W" for the missing one? Sure, but that isn't helping me understand what I am doing wrong. Any ideas?

Dewalt Collet Holder - no tags.svg697x216 13.1 KB
Collet Box - Bottom 2.c2d (453.6 KB)

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Surface quality issues on x-axis

April 24, 2017, 5:16 pm
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@cgallery wrote:

I've been machining some polycarbonate and some cast acrylic and note that the surface I get on the X-axis is a little rougher than what I'm getting on Y, and sometimes I can see deviation from a straight line by .003" or .004", a sort of wavy instead of straight line (the Y is pretty darn straight).

I've tried climb vs. conventional cutting, final passes of .01 and .005", different bits (including new), etc.

I'm using .125" bits (1/4" shank) and DOC of .004" to .006" and I've tried feed speeds as low as 40-IPM and as high as 65-IPM.

The thing is, it only happens on the X-axis, and I've tried everything I can on the X-axis, checking and replacing wheels, etc. It is snug, I cannot find any play there.

Ideas for debugging this?

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Carbide Create Not Responding

April 25, 2017, 9:07 am
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@dragonfly wrote:

Hello all. Pretty new to CNC and the forum and have made a few things so far. Has anyone solved the problem of Carbide Create and its issue of with the message "not responding" that appears generally when you are importing an svg image or when you are creating toolpaths? This has happened to me on two different computers. I found another thread that briefly touched on this issue but it didn't seem resolved. See baaja F B comment here - http://community.carbide3d.com/t/carbide-create-keeps-crashing/4384/4?u=dragonfly
It is VERY frustrating.

Thanks,

T

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My Job is great!

April 25, 2017, 9:49 am
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Shapeoko 3 XL has arrived!

April 25, 2017, 1:18 pm
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Toolpath gaps for some letters

April 25, 2017, 3:02 pm
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@relic wrote:

Was making a vcarve sign for some friends, and had an odd result. I was using Tangerine font which I have used before and now it skips letters in the toolpath. The r is created in one word but not the next. I have read the posts about reversing letter wraps but it creates the letter one time but not the next so that doesn't seem to be a problem. GregoryAuto.c2d (7.5 KB)
Am I missing something? (I am a complete noob)

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Z axis limit switch and homing

April 25, 2017, 5:27 pm
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@PhilG wrote:

Whilst running a tall job I miscalculated on retract height and hit the Z axis limit switch. Needless to say the job stopped and now we are in a state where there is no jogging or running jobs because one can't get past homing. Already encountered similar on X axis and that is easily fixed by powering off and shifting the bed manually but the Z has me a bit stumped. Tried disabling homing via setting $22 to 0 but did not seem to disable homing in carbide motion. Guessing I need to fix this by sending MDI commands - any suggestions?

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Mach3 Configuration requirements for Shapeoko 3 XXL

April 25, 2017, 8:17 pm
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@edzacly1 wrote:

Re: Shapeoko 3 XXL Mach 3 Configuration

Greetings,

I am planning to purchase a Shapeoko 3 XXL CNC Machine but I would like to run it with Mach 3

First Question: Does anybody out there have an organized list of what would be need to be added to the Shapeoko to configure it for Mach 3

Here’s what I have / know so far that would support a configuration change:

  1. G540 4-Axis Digital Step Drive

  2. Motherboard Parallel LPT Printer Port Cable slot bracket 25 Pin socket female Optional depends on your current computer

  3. Upgraded power supply?

Second Question:

What do I ask Carbide 3D to remove from it’s current offering so that I don’t have redundant components.

Regards,
Ed

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Cutting Aluminum with Nomad without Lubricant?

April 26, 2017, 6:04 am
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@cooper136 wrote:

So I am currently maching some aluminum that is .124 thick, cutting through it, pretty thin with a #101 endmill. AL 6061, am I okay to cut this for not without lubricant? I dont have any handy.

What brand / type lubricant is recommended?

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Shapeoko homing when quitting a job

April 26, 2017, 12:32 pm
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@Rick wrote:

While testing I ended up pausing then quitting a couple of jobs. After clicking on quit the machine performs what I assumed was a homing cycle but it's not. It does move toward the home position (back / right of the limits) but when it hits the Y limit switch it just stops. In a normal homing cycle it would pull away just a bit so it's not resting on the switch. If I try to do anything after that I get a limit switch error because the y-axis switch is depressed. Maybe that's intentional but it does make recovery just a bit more complicated.

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HELP with Image

April 26, 2017, 3:21 pm
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@jordanhale wrote:

Ok guys I really need some help with this image. I can not get a bitmap trace or anything to come out right for this image. If anyone can do this with a different program or way please help me out. I have spent a few hours and still nothing. I have been using Inkscape but I can get it to pick it up.

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Do you cut aluminum?

April 26, 2017, 4:54 pm
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@fiero1 wrote:

So I know aluminum can be cut without lubricant. I was wondering if those who do use it,
are you still able to cut wood without the lubricant contaminating the wood?
do the cutters send it flying every where? Thanks Ray

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I can not Create a path for tis logo

April 26, 2017, 6:16 pm
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@KingFisher wrote:

Can not get a V-carve path for the logo for a client. I have imported from the client a SVG fie but when I open it with carbide design it does not show the "cut" in the simulation.

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Couple of questions about the speed and feed chart

April 26, 2017, 7:39 pm
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@rnelwan wrote:

I've got a couple of questions about the speed and feed chart found here: http://carbide3d.com/shapeoko/feedandspeed/

DOC
Is this an acronym for "diameter of cutter"? Also, the value that is found in this column, are they only limited to just this size? What if, for example, I want to use .25" instead of .4" for pine wood. Do the RPM, feed, and plunge values change or do they remain the same? If not, by how much do they change?

FEED and PLUNGE
What unit are these values in? Also, are they in measurement over time? Example: 100 mm/min?

thanks!

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