Posts for Tag: CNC

CNC Machining Oneshop Redding error33

Alright, back at it again. So after running through a simple path to see if it would stop before completion I found that it still does, what would happen is it would go through about 40% of its path, then give the carbide an error code (error33) and stop the toolpath, I've gone through a bunch of different cuts, sometimes trying them several times and nothing worked. I've tried different outlets, different power banks entirely for the router but always had the same result. I asked my brother as he mentioned having some similar issues and tried his solutions but didn't work. What he had done was to lower the fine tolerance of the passes to have a rougher cut out, then come by later with another tool to clean it up.

After looking a bit online forums I found a few possible solutions. 

Carbide 3D's Shapeoko cnc machine was originally designed in metric VS imperial. It supports imperial, however it wasn't designed specifically for this and so has to do calculations to convert it to that and so has a lot more of a load than if you where working with metric. If this is the issue then simply designing everything in imperial then just switch the units it measures to metric when setting the tool paths.

This would also explain why not so many people are having this issue as most people use metric for designing and creating toolpath's. Which I primarily use as well but didn't have any metric measuring tapes when setting the stock and so set the unit of measurement to imperial.
Another possible reason for the issue is the sheer amount of digits it has to calculate and one guy said he solved the issue by rounding everything to only have at most 3 decimal spots. For instance, if the side load cutting rate is at 0.04195 you would simply round that to 0.042 and etc with all the settings. Apparently this reduces the overall load the machine has to take.

Here is a link to the forum that I got this information on:

So after making a few modifications to the tool path settings, I set it running again and await the results.

CNC Machining Oneshop Redding (router problems)

Today, when I got to Oneshop the router for the CNC machine, wouldn't turn on, the light would come on indicating that it has power, just the tool wouldn't spin. Was looking around thinking maybe a cord came loose or something of the sort, but nothing was loose. I asked Tyler (oneshop owner) about it and he said the brushes on the motor top may have worn down sufficiently to need to be replaced. Thankfully he had a couple of extra which I installed and that got it working again without a hitch.

After starting up another cut of Kevin (small circular paperweight) it started without issue and ran through about 80% of its path before it suddenly stopped moving. This was a bit annoying and I had noticed it doing the same with another cut. After posting this on Instagram, my brother mentioned having the same issue and that the solution was to lower the tolerance from its default 0.004in to something rougher and just create a new toolpath to clean it up afterward to get a cleaner finish. The reason it does that is the computer has to calculate each layer and multiplies over and over to the point where it overloads and crashes. I believe this is just an issue with this specific machine though I haven't tried it on the larger one they have.

CNC Machining Oneshop Redding

Unfortunately, today didn't start off on a very good foot. Number one, I forgot to save my files from what I did before so I had to start from scratch, which I didn't think would be an issue. Second, I forgot a few of the steps to getting started. My first problem arose when I tried setting the tool for the router and it wouldn't accept a 1/8" drill bit when I put in all the info. I tried other bits and those worked without issue. I called my brother up @jehtradedollar and asked him why this would be. I feel pretty dumb because this was specifically mentioned in the tutorial I watched nearly a dozen times, and that is, drill bits can't be used to mill out a stock, they can only be used for up and down, so drilling a hole straight down would be an example. He said that if its some cheap bit that doesn't have specifications on the packaging then just to set it as either a flat tip or ball. In this case, I chose a ball head tip even though the actual bit is something different. One of the other issues I kept running into was the router would dive into the wood. How it should work is a slow spiral down descending at about .5mm per layer until it touched the wood at which point it would slow down even more and continue on its toolpath. This would prevent it from starting too early if you were to set the y-axis too high, or measured something wrong in the program. The issue I was having is where the machine would stall as its rising then crash down skipping a gear and the machine would think it's still high above the wood and would cut more than it could eat. The problem, like the other one, was pretty obvious, the wood I was using was 1 5/16" and the router was set too low so when it was raised it would get raised to the maximum height at which point it would stall, then plummet. The solution for this was simple and had a couple of different options. The one I went with was to swap the wood out with something shorter. This was a simple fix which may not be a solution for larger parts. Another fix would be to set the router higher, this would allow the maximum height to be set higher and so wouldn't stall going over 1.5". Another solution would be to set the raised height at which the router descends from to start its spiral to be lower over the wood. For this I set it to be about 1/2" above the wood at which point it would start its descent.