Posted by RCWorks |
May 09, 2015 @ 05:44 AM | 1,712 Views
I have a 10 year old Harbor Freight 8x12 lathe that I will be making some improvements to. The first is a tachometer for the spindle.
There are 3 reasons to do this.
1. This lathe uses change gears, it easier to turn on the lathe and read the tach than to open up the gearbox and figure it out.
2, The cutting speed of the tool, many tools have an optimal speed and over speed can take the edge off a cutting tool if not damage it.
3. I plan on a variable speed motor in the form of a 1hp motor with a variable frequency drive.
So I will start off by listing the larger parts, I won't bother with nuts and bolts.
A chassis. I am using an LMB 3x4x5 inch aluminum chassis.
A Tach with divider. Since I am using more than 1 magnet on the hall effect wheels I will need to divide the count by the number of magnets that run by the sensor per revolution... In this case 8. Make sure it comes with the hall effect sensor or you can get one separate.
A power supply, I like a bit of overkill. I am using a 12 volt 2 amp switching power supply. While you can use a 9 volt battery the life span on the display will eat one in 3 hours.
A 40mm fan, always with a switching power supply.
A fan guard. A nice touch, make the unit look like it was a factory made item and it keeps stuff out of the fan.
A PC power cable. I like the fact if it goes bad you can get another fast and no soldering to replace it.
A socket for the power cable with switch.
8 3mm x 5mm rare earth magnets.
A 3 inch diameter piece of 6061 aluminum round rod 2 inches long.
Posted by RCWorks |
Oct 04, 2014 @ 05:07 AM | 5,048 Views
I am going to eventually convert this mill to CNC but for right now all I really want is a power feed since I normally operate this one manually.
I bought this mill in 2006. I have put 20 thread per inch leadscrews in it and changed the spring for that Littlemachineshop.com air spring assembly.
One day if and when the motor dies I will probably adapt a spindle motor and a VFD to it with a belt drive But that's a project for a later day...
So far I have bought all the parts for the powerfeed except the plate to use for the stepper motor adaptor.
I was looking over the internet for a reasonably priced CNC conversion kit and at $615 with no steppers CNCFusion.com lost me, however since I have a lathe and mill I have what I need to make the same parts.
I am a bit more budget minded and I do want be able to use this mill manually so I will retain those fairly fresh leadscrews.
The most expensive part of the powerfeed controller... Believe it or not it is the aluminum chassis. Yes a plain jane metal box. I bought the cheapest one that would hold all the parts.
The large parts inside were ready made, the 12 volt switching power supply and the 3.5 amp bipolar driver.
The square wave generator and the 12 volt to 5 volt regulator were DIY kits. The Square wave generator was modified for this application. You can build that square wave generator yourself at Radio Shack but it will cost 3 times the $2 I spent on the kit with an already etched circuit board. While the square wave...Continue Reading
Posted by RCWorks |
Jan 26, 2014 @ 03:30 AM | 4,920 Views
Getting back to my CNC mill project as I was so rudely interrupted by medical issues an weather bad enough to keep me indoors. I am on 2 meds that leave me temperature sensitive.
I noted a light surface rust on my slides so I took them to the bead blaster for a cleaning, masking, a spray of Rustoleum and a light coat of oil.
I have part of the upper section cut for the legs, I need to finish that up then I can set the Y and Z axis in place and wire it up.
My spindle motor is in, I just need to wire it up to the speed control.
I have the Stepper controller and power supply as well as the USB interface.
I need to install my video card for Mach 3 compatibility and hook all the jumpers and switches. I violated convention(Mine anyway.) and used a switching power supply to run the steppers and controller. I think in a week I should have it all up and running and create a program to drill the table for holding the plate to the frame and holes for clamps.
Soon as this is done I have about the same amount of work to do to my 4 axis foam cutter.
I have not gotten back in to kitting for lack of work space...
I was thinking of adding a workshop in the back yard but I got to taling about the sale price of my place here when I sell it and "out buildings" are not even looked at when appraised. Made me think. (that hurts)....
So I talk to a few guys I know and figure that a house can be had in good shape for as little as $10,000. With that in mind I think I want to buy 5 houses. 4 to rent and 1 for a shop.
I am retooling some CNC stuff and building a couple of new CNC tools so I need the room.
So I am hoping to get things done by Christmas.
I hate to profit from the misfortune of others but this is a chance to get in and make a few buks on the rent and a few thousand when the market comes back
Posted by RCWorks |
Aug 06, 2006 @ 01:49 AM | 5,804 Views
Well I managed to fall down the stairs last week, ankle tweaked (again ) and elbow still hurting, just getting where I can stand again. darn ankle is still swollen... socks dont fit yet...
It's 11:00 on saturday night and I am cutting foam, got me a barstool (my lofty perch) so I can see the machine without the constant standing.
We are sending out the 2007 version of the Sickle 480/M it uses the MAXAMPS 3s4000 mah lipos
I got 4mm coro!
I am low and out of some 2mm colors.
We will be ordering Monday, where I get it the online store is jacked up and wants to hit me $130 shipping for one sheet. I will call and get that fixed tomorrow.
I bought out my carbon suppliers stock, anymore when I place an order I have to email ahead and make sure my suppliers have enough stock for an order, if not I just take what they have. this is a different feeling for me, I never had that happen til this summer. I feels good but is becoming a pain. I am now lining up more than one supplier for items that I have to buy. This is uncharted territory. I am beginning to see the appeal of this business.
Monday I will be all caught up. Time to cut ahead of the game for Christmas. Build up the stock.