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  #91  
Old Mon 14 September 2009, 11:48
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Hope so, the machine is to be dismantled and moved to a different location soon. That was me behind the machine. I was next to the box and the pc hoovering over E-stop just in case.
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  #92  
Old Mon 14 September 2009, 15:13
Doug_Ford
Just call me: Doug #3
 
Conway (Arkansas)
United States of America
Congrats Martin. I'm envious of your water cooled spindle.
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  #93  
Old Tue 15 September 2009, 08:44
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
I havent tried it yet. At the moment I am redoing proximity switch holder for the MM.
I will try and connect spindle on friday hopefully.
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  #94  
Old Mon 02 November 2009, 12:33
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
I am back with some photos showing current progress. All mechanical parts are done. The spindle was turned on and checked for the first time. The cooling system is mounted on the car with the pump and the reservoir. The radiator as well rides on the car and if need be the fan can be added as well. I have received my first bits. I ordered two ballnose bits and one three flute and one two flute end mills. The remote push buttons on the MM are working fine. I plan to add one more button on the car zero routine. Unfortunately not enough space for input. THere is already Pause, Resume, Probe for tool height and Proxies. I got the board to be used for controlling spindle via mach as well. It is not that easy to connect it on that chinese VFD. Will post some more picturs soon and a video as well.
I noticed that when running a g-code with the machine turned on there is light jerk that can be seen. It happens while transition from one line of a g-code to the next one. Any ideas what might cause it to happen?
Attached Images
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File Type: jpg IMG_6856.jpg (214.0 KB, 1178 views)
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  #95  
Old Mon 02 November 2009, 12:42
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Have you cut anything yet? There is a serial number (#37) waiting . . .
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  #96  
Old Mon 02 November 2009, 12:45
domino11
Just call me: Heath
 
Cornwall, Ontario
Canada
Martin, Nice work.
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  #97  
Old Mon 02 November 2009, 12:57
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
No, not yet,. A bit afraid of that plunging and letting the machine take over the control. I think it is gonna take few more days before I can actually cut something. I need a bit more confidence with the machine to master it.
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  #98  
Old Mon 02 November 2009, 16:16
bradyaero
Just call me: Greg #19
 
Smiths Falls, Ontario
Canada
Hi Martin,

Very nice work, Make sure you Set Mach 3 to CV mode, then you'll have to work on your motor acceleration to get a nice smooth ride!
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  #99  
Old Mon 02 November 2009, 21:53
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Will do, thanks a lot.
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  #100  
Old Mon 02 November 2009, 21:55
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Martin, we started with a spring-loaded pen before we were brave enough to use a cutter.
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  #101  
Old Wed 11 November 2009, 11:47
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
First and hope the last bit down. I broke my first bit. It was 3mm ballnose that I broke. I set the machine for dry run just to try it with the bit in the spindle. While the g-code was running I decided not to turn the spindle on yet and that was mistake. The settings in Mach3 wasnt set right. I didnt mark Z axis in Homing/Limits configuration tab as reversed. As a result the bit plunged into material which wasnt supposed to happen if the setting was marked. Anyway I will post some photos tomorrow. There is so much to learn. I found also there is electromagnetic interference in the controll box. My proxies in the middle of the table react but actually they shouldnt. I checked with multimeter the relays and they showed reading as they were switched. It is kind a wierd that my MM runs smoother without CV setting. My other solid carbide bits do not perform very well either. I set vfd for 20000 rpm and was trying to cut solid soft wood at a slow feedrate and 3 mm a pass. There seem to be smoke visible. Maybe those settings programmed in vfd are not right. I have PD3 set for 400, PD4 set for 400, PD5 to 400 as well.
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  #102  
Old Wed 11 November 2009, 12:30
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Bits burnt and bad marks on the wood as well
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File Type: jpg we.jpg (50.0 KB, 1082 views)
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  #103  
Old Wed 11 November 2009, 13:36
Claudiu
Just call me: Claus #43
 
Arad
Romania
Congratulations for your first cuts!

My personal opinion regarding the marks is that your spindle or complete z-axis is not perfectly vertical, but as I said, it`s only an opinion. I guess here are a lot of people with more experience and will help you out with that.
Don`t give up, it`s already a great achievement!

Good luck.

Bye
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  #104  
Old Thu 12 November 2009, 07:49
javeria
Just call me: Irfan #33
 
Bangalore
India
Martin those look like HSS endmills, you should use carbide bits
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  #105  
Old Thu 12 November 2009, 10:18
domino11
Just call me: Heath
 
Cornwall, Ontario
Canada
Congratulations of the firsts cuts Martin!

See here Mach motor tuning

I think the guys are running with CV turned off.
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  #106  
Old Thu 12 November 2009, 14:38
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
I ordered the first three solid carbide bits from this site http://www.frezycnc.eu/solid-carbide-tools/. There are three bits in the picture and the first one on the left is supposed to be solid carbide. Thanks Guys anyway. I will try reconfiguring my vfd tomorrow. Maybe setting for speed is set wrong way.
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  #107  
Old Sat 14 November 2009, 00:46
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
The cutting will get better, once you have the speeds set up correctly. (My first guess is that you are cutting far too slow - slow speeds cause burning)

But, you must now get a serial number! I was away for a time, and I don't know what the next number should be - can someone else help here please?
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  #108  
Old Sat 14 November 2009, 02:42
esadaddy
Just call me: LLoyd
 
Atlanta(Ga)
United States of America
Is it possible you a running in reverse?
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  #109  
Old Sat 14 November 2009, 02:52
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
I dont think it it possible. I have PD setting responsible for running counterclockwise set to 0. This setting forbids the spindle to turn left. I bet Gerald might be right. I need to change settings for speed.
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  #110  
Old Sat 14 November 2009, 11:27
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
And you have serial #39!
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  #111  
Old Sat 14 November 2009, 20:57
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Update Builder's Log

Martin,

Congratulations on your Mechmate and Serial #39.

The Updated Builder's Log is here.

Please let me know the dimensions of your MechMate for the Builder's Log.

Also, please review your entry and let me know any changes you would like.
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  #112  
Old Wed 18 November 2009, 11:29
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Thank you all for your input. Thank you Gerald for the serial number. I have the table size corresponding to 2800x2070 sheet of MDF. I ordered ferrite and EMI filter for the VFD and also a digital tachometer. I am prytty sure now that the spindle is spinning at the right rpm. As for the burning of the bits that was due to slow feed rate. So I think.
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  #113  
Old Wed 18 November 2009, 14:20
jhiggins7
Just call me: John #26
 
Hebron, Ohio
United States of America
Dimensions added here.
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  #114  
Old Fri 20 November 2009, 10:23
Claudiu
Just call me: Claus #43
 
Arad
Romania
Hello Martin

This is what I found, maybe it is of use for you.
It is a general guideline finding feed rates and maintaining tool life.

- Perfect Feed Rate
1. Start at the low end of the feed rates.
2. Increase the feed rate until:
a. The edge finish deteriorates.
b. Or the router bit risk breakage.
3. After one of the above happens, decrease
feed rate by 10% and reduce the RPM's
until the edge finish once again deteriorates.
THIS IS THE POINT OF MAXIMUM
PRODUCTIVITY AND BEST TOOL LIFE!

Make chips not dust!
1. Can you throw the chips or do they float in
the air?
2. To make chips not sawdust. You need to
increase the chipload by increasing the feed
rate or lowering the RPM's or using less flutes.
3. The larger the chip removed, the more heat
that is removed with it. This keeps the bit cool
,
and increases tool life.

Hope you get your VFD working. I know I have a manual at work. I will try to post it here when I get to my office comp.

Bye
Claus
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  #115  
Old Fri 20 November 2009, 14:03
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Thank you for the info Claus. It is the feed rate that is essential. I checked the spindle with a optical tachometer and it displayed near to 24000 round per minute. So far I have been cutting styrofoam will try the bits and the spindle on the wood with higher feed rate.
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  #116  
Old Thu 26 November 2009, 10:40
Claudiu
Just call me: Claus #43
 
Arad
Romania
Hello Martin,

Did you find out what the problem is?
Just an idea, why don`t you try cutting with reduced spindle speed up to 8000 rpm.
This speed should be absolutely sufficient with a 2 flute upcut bit.

Are you controlling your VFD / Spindle with Mach3 or manually?

Greetings
Claus
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  #117  
Old Fri 27 November 2009, 00:50
sailfl
Just call me: Nils #12
 
Winter Park, FL
United States of America
Martin,

Congratulations on the serial number and cutting.

I personally think that 8000 rpm is too slow. The idea is you want to cut fast as mentioned to remove the chips. I have my Mach set to CV and I also have Stop CV on angles > 40 degrees but you need to determine what angle you want. This will give you square corners when you want them.

From my experience the cuts look like you bits are not squre to the table. I use solid surface material to check my alignment or a piece of hard wood. You need to adjust the Z.
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  #118  
Old Fri 27 November 2009, 01:47
martin77pl
Just call me: Martin #39
 
Wroclaw
Poland
Hello guys, I am controlling the VFD manually at the moment but I plan to have it controlled by Mach. I am waiting now for dust extractor to arrive. That CV setting is causing jerky moves of my machine. If CV is off the moves get better.
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  #119  
Old Fri 27 November 2009, 04:01
sailfl
Just call me: Nils #12
 
Winter Park, FL
United States of America
Martin,

Interesting about the CV. Thanks for trying.
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  #120  
Old Mon 22 February 2010, 04:17
kostas5
Just call me: KOSTAS5
 
WARSAW
Poland
Hi Mrtin
I am hapy to see your good job withe MM very nice one ..and i like to ask you where i can buy laser cut parts and other parts..i hope thats you can healp me
thank you
kostas
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