It has been a month with the new job and it is still awesome compared to the old one. Stress free, I’m basically my own boss and I pretty much control my paycheck.
The other day I spent time with the youngest son and both played around with some R/C cars. We got a couple of cheap ones from Walmart. Afterwards I rebuilt my car and made it a hell of a lot faster. Tossed in a old control board I had in my junk box and changed out the odd 4.5 voltage rated caps to higher voltage caps that matched the Micro Farad rating and tossed on a 8 volt battery.
The Desktop CNC project is slow going still. I am taking my sweet time with it so everything will work correctly.
In the mean time I came across a old JCPenny CB radio and stripped it down for parts. The case will be reused for my Component tester. The fake wood and flat head screws have a neat old school look.
Other then that I have been spending more time with the family since I am home in the evenings now.
When building a CNC from wood it can be very challenging. Unless you have a full fledged wood shop. With basic tools that most people like me have it involves tons of sanding to get a level surface. Not to mention a bunch of measuring and remeasuring to make sure you get a proper straight cut. The router table setup I have works well to straighten up most of the cuts but everything else requires tons of hand sanding. I’m tempted to buy a electric sander before doing anything else. Now this isn’t because I went with OSB for the material, this is the challenge for any kind of wood.
I came across an awesome circuit for the Spindle. The circuit ramps up the speed of the motor when the RPMs hit a certain speed. Or should I say when the motor bogs down it adds more juice. I got this from a YouTuber called MrJohhhnnnyyy.
One thing that isn’t shown on the schematic here is you need a Diode to go across the motor terminals for added protection. I doubt 40V is needed to drive the circuit, I am planning to use a old laptop charger to power it. I could always use a small transformer that is rated for 40 volts, an bridge rectifier and boost up C1 to a higher capacity or add in a second filter cap.
I worked on the Y-Axis a bit. The railing I have is too flimsy to use so I found some old drawer handles. I sanded the paint off and polished it with 2000 grit sandpaper. It came out real nice and now I need to mount the railing. Before mounting them I need to find something to use a bushings. I could use some bearings I pulled from old hard drives but it would cause more time to setup for them to run perfectly parallel.
Today was a good day. I worked on the CNC for a bit while ever so taking my time. When you create a one off prototype you have to really plan things. I don’t like to sit at the computer fighting SketchUp for designs. I prefer to take the material I have and physically draw the layout and put it all together as I go. This way if I run across a problem I can quickly resolve it.
I worked on the Z axis a bit today. When I was thinking of game plan I decided to use a hard wood for the base that will hold the spindle. The vibrations with OSB might loosen things up over time.
Since the back piece of the Z-Axis is OSB I made sure to use the ruff side the glue side so the glue can adhere better. The piece of Oak is pallet wood. I let the glue setup enough that it was squared and remove it from the workbench. I re-clamped to itself and letting it cure overnight so I can pre-drill and secure it with screws. I wish I had enough Oak to do the whole Z-Axis but as long as the spindle mount is solid it should hold up. I’m not planning to use a Dremel or anything like that for milling/routing.
These rail pieces I found last week. I think they were from some can light fixtures. They were sticking in the dirt at a job site. I cleaned them up and filed down the high ruff spots until they slid true. These will be the glide rails for the Z-Axis.
I did a test fit for the X-Axis glide rails. I was a bit off but a simple fix with the router table fixed it. I plan to do a friction fit for the glide rails and cut them to the final size on the final assembly.
I need a base and table to finish the skeleton of the unit before I start on the Y-Axis. I plan to use solid wood for the X-Axis table so I can level it on the first run. I am still going to use a Arduino with GRBL loaded up as the controller. I found a nifty Android app that can control the unit. It costs about $20.00 for the Bluetooth package I might use on the final setup so I can use a old Cellphone or Tablet as a dedicated unit. To power the whole thing I got a 19volt laptop power supply that is rated for 3.5 amps. Should be plenty. I can always add a 5volt regulator to power the Arduino.
Last week I was finally able to work outside again since the remodel for the exterior portion of my apartment building. I was rummaging around my storage closet and came across a sheet of Oriented strand board (OSB). OSB is dirt cheap, a 4ft X 8ft sheet can go for about $6.00 to $10.00 at Home Depot. I laid out by hand the parts for the frame of the CNC unit. Instead of having the Gantry moveable I decided to have the X axis move. I cleaned out the ruff lay out with my square and used the Jig saw to cut the parts out.
Since a Jig saw cuts ruff and like heck you’ll get anything squared up I used my hand router with a flush trim bit to make everything square and to the correct sizes.
As a reference for a straight edge I found a small piece of scrap wood that was square and used a hot glue gun to glue the straight edge to the OSB pieces.
After messing around with the Router I was able to get everything squared and perfect.
Nothing is fasten together yet. I will do that on the final assembly. I have found a few options for the spindle and a few ideas I want to try for the railing system. I plan to work on this more this Sunday.
Happy New year to all of my Followers/Readers.
To roll out the New Year I have started a new job pre-wiring houses for TV, Data and Security. Some times even Speakers for Audio systems. It’s a easy job but the summer heat will probably suck.
Since taking on the new job we had to turn into a two car family. The Wife and I bought a 2016 KIA Forte since I turned the Family Van into a Utility work vehicle.
For the new Job I bought a RYOBI ONE+ Drill and Impact driver set from Home Depot that were on sale for 99 bucks. After using them for a couple days I have made up a little review performance wise. Lets start with the Drill. It feels nice and sturdy and some what light weight. For the work I do that requires to drill into multiple studs with a 3/8 twist bit it works fine but with Paddle bits it has no torque. As for the Impact driver it also feels sturdy and light weight. You can drive screws in like a hot knife thru butter. I was able to get by two days before having to recharge the batteries for both devices.
Yesterday I got a killer idea for a Cartoon. I got a hold of my oldest friend yesterday to talk about it since he does art and a few times we talked about doing a cartoon since I can do voices. I won’t go into detail about it but it will be a adult like cartoon comedy.