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  #91  
Old Fri 28 June 2019, 04:54
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
First class!

So is there a microprocessor in there somewhere?
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  #92  
Old Fri 28 June 2019, 05:51
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
There is an ATmega328PU microcontroller running it. I have a drawer full of them from some previous projects and are very simple devices. These are the microcontrollers that many of the Arduino line of devices are based on, so you can use the Arduino IDE to program them. There is a limited number of I/O lines, but enough for this project. The good thing about using a microcontroller for this kind of job is that I can keep tweaking and updating this software. I included an SD card interface, so the software can capture and save data for things like spindle run hours, average coolant flow rate, etc, I just have to add the functionality to the software. Fun project.

Ted
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File Type: jpg FlowSensorSchematic.jpg (144.0 KB, 129 views)
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  #93  
Old Fri 28 June 2019, 14:18
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
More 4th axis shenanigans

Needing to run some cuts for testing the flow monitor, I tried out some detailed carving on a 3D surface with compound curves. Using .25mm tapered ball nose bit, smallest I've used yet. I expected it to snap at any moment, but it made it through just fine.

Ted
https://vimeo.com/345093710
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File Type: jpg Dragon Fly Cup.jpg (129.8 KB, 130 views)
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  #94  
Old Sat 29 June 2019, 05:07
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Classy! I'm running out of superlatives.

And, I learned something new from your schematic discussion (thanks for sharing). I hadn't thought of using the Arduino IDE with my own circuit. What a great idea.

So have you considered adding a temperature probe (like the K-type) with appropriate microcontroller to your configuration? Oh, and with your data logging capabilities...
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  #95  
Old Sat 29 June 2019, 08:09
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Thanks, John.

Yes, I have thought about that, and I added the inputs to the pcb and connector to the chassis when I built it. I also have the probe I'm going to use. I ran out of good, shielded 2 conductor cable, but have some on order and will install it as soon as it gets here.

Also, learned a good lesson this morning. Just because Vectric gives you the toolpath for your mill of choice, doesn't mean that your collet is going to clear the sides of your profile. Time to buy some longer ball mills!

Ted
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  #96  
Old Fri 05 July 2019, 20:22
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Been spending so much time with the 4th axis, I haven't put down a real spoilboard. Time to fix that. I'll have to look up the drawing specs, but I think i remember them calling for 6 bolts per crossbeam, so 48 holes to drill and tap. I also started looking real closely at my rails for being parallel and coplanar. My x-rails are about 2 mm off from parallel right now which is well within the adjustment range of the bolts holding the rails to the main beams. I seem to remember a method of using wire cable with a sag chart to shim the rails true, but I don't remember what the best method was to get the rails at the same height. Feel free to chime in if you've done this! I'm too old to reinvent the wheel.

Ted
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  #97  
Old Sat 06 July 2019, 07:37
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Spoilboard

First bolt in spoilboard. 47 more to go. This is going to be a Guinness kind of day. I've got 2 M8 taps/bits. Think I'll get them all done with just those 2 taps? Probably depends on the Guinness to work ratio!

Ted
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  #98  
Old Sat 06 July 2019, 12:52
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
First tap broken at hole 23. Guinness ratio still way too low!

Ted
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  #99  
Old Sun 07 July 2019, 04:37
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
I assume you are using a "good" taping fluid like Rapid Tap. I was given the advice to use such a product 10 years ago when I built my MechMate #26. I, mostly, used Harbor Freight (cheap) taps. I didn't break any taps.
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  #100  
Old Sun 07 July 2019, 07:43
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Thanks, John. Yes, I use Tap Magic and a cordless drill. When I think of all the hand tapping I did as a kid, with no tapping fluid, I can only shake my head. I broke that first tap because the drill torqued out of my hand. Two wrist surgeries ago, that wouldn't have happened! That was the only casualty, however, and the deed is done. On to gluing the second piece of MDF down today. I have lured some family/friends over with promises of grilled food and beer, the suckers. They are going to help me get this finished.

Ted
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File Type: jpg SpoilBoard2.jpg (144.5 KB, 90 views)
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  #101  
Old Mon 08 July 2019, 04:38
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Looking good! And there's that 4th axis again. I wish I had thought of extending my X rails so I could add a 4th axis like you did. I did configure a space in my control box for the 4th axis driver.
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  #102  
Old Wed 10 July 2019, 15:34
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Well, so much of my work is at the lathe, it was natural for a rotary axis to be high on my list during the planning.

I did get the table surfaced. However I would not recommend doing that without functional dust collection on the machine! I have worked with MDF many times over the years, and have even routed it before. But... the amount of dust this thing made when surfacing was unreal! I ended up leaving the machine to it and waited for it to finish to come back. It took me half the night to blow out my shop! I do have a dust collector for my shop mounted outside the shop and it works well for my other tools. I just haven't had time to make the pipe/tubing runs up for the beast. Big mistake! I'm making the time this weekend (assuming the expected bad weather down here leaves me alone) to get it done. Anyway, the surfacing went well and I have a pretty flat surface now. Still trying to decide on clamping system. I have some t-track I can lay down, or maybe just route some t-slots in the spoilboard itself.

Ted
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  #103  
Old Wed 10 July 2019, 18:25
lonestaral
Just call me: Al #114
 
Isarn
Thailand
Send a message via Skype™ to lonestaral
Well done.
Coming along nicely.

MDF, yuk!!!!!!!!!!!

Reference the clamping, I used T nuts.
I made a couple of cam clamps.
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  #104  
Old Thu 11 July 2019, 11:02
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Thanks, Al. Yep, MDF = Double Yuk!

The good thing about my dust collection is that it is outside my shop in a small outbuilding, so I don't have to worry about fine particulates escaping through any filters in my shop, and it is much quieter.

I also built a shop air filter that hangs from my ceiling with 6 high volume PWM fans. It sounds like a server room when it spins up to full speed. It runs through a MERV 13 filter, and is pretty good at getting dust down to 1 micron, and about 50% of particulates down to .3 microns. Of course, it is centered on the MechMate and is right in the way of where I need to stop my horizontal pipe run and drop the vertical flex hose down to the machine, so I've got to get up there and move it.

So, Al, do your cam clamps apply pressure down from the top of your work piece or from the side?

Thanks,
Ted
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File Type: jpg AirFilter.jpg (140.5 KB, 66 views)
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  #105  
Old Thu 11 July 2019, 18:13
lonestaral
Just call me: Al #114
 
Isarn
Thailand
Send a message via Skype™ to lonestaral
The cam clamps apply side pressure.
I use them when surfacing a workpiece.

I thread in a couple of short M8 studs at the rear so they are below the finished thickness and tighten the clamps.
This allows a clear run over the work.
When profiling I use a hold down clamp.
Hope this helps.
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  #106  
Old Sat 13 July 2019, 12:43
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Thanks, Al. Yes, it does help.

Finished my dust extraction setup last night. Made up a steel post that mounts to the top of the Z stiffener and holds the hose up above the energy chain so that it can drape down before it turns up towards the ceiling. Looked like that was Gerald's recommendation. Seems to work well. I was somewhat concerned about it applying bending force to the Z axis, but I'm not seeing any issue so far. I bought the cheapest metal dustshoe I could find and had to cut it and re-weld it to make it fit into the Y-carriage. I plan on making one out of acrylic or mdf with magnetic mounted brushes to allow easier collet access, so I didn't want to spend too much on this one.

We are having a lot of mains power outages today with Hurricane Barry practically on top of us, so I'm not running the machine. Taking the time to do some design work and further researching laser options. I have been really happy with the cheap laser I bought to test with, and I want to get a higher quality, higher power and PWM controlled one in the 5 to 7 watt range.

Ted
Attached Images
File Type: jpg MechMateVacuum1.jpg (137.4 KB, 51 views)
File Type: jpg MechMateVacuum2.jpg (149.8 KB, 51 views)
File Type: jpg MechMateVacuum3.jpg (136.7 KB, 49 views)
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  #107  
Old Fri 19 July 2019, 21:51
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Started fabricating a better dust shoe. The cheap one works great for 4th axis, but too tall for my shorter mills. This is the first milling that I have done where I had to hit measurements. Drew this up in Sketchup Pro and brought it into Aspire, then cut out this prototype. Can't tell you how ecstatic I was when I measured that opening that slides over my 80mm spindle! Yes!

Ted
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File Type: jpg IMG_20190719_081025232.jpg (133.8 KB, 23 views)
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  #108  
Old Sat 20 July 2019, 05:08
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
I know the feeling. You're almost afraid to make that first accuracy measurement. Because, if it's not correct, it's totally your problem...you have to fix it...can't call the manufacturer's Support Desk, YOU'RE the manufacturer. So, congratulations, you've done a lot of things RIGHT.
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  #109  
Old Sat 20 July 2019, 18:13
xraydude
Just call me: Ted
 
New Orleans, LA
United States of America
Thanks, John. That is EXACTLY how I felt!

Look what came in the post today! She is all logo'd up. Now it feels complete. 3465 days from my first post. Man, I had no idea what I was getting in to!


Ted
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File Type: jpg TedsMMwithLogo.jpg (149.0 KB, 19 views)
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  #110  
Old Sun 21 July 2019, 15:56
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
That's a beautiful sight. Hey, Mike, time to award a Serial Number.
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