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Messages - xtal_01

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1
Thanks for all the advice ... will be asking a lot more soon.

I got my mill ... a MB-14 Fryer CNC bed mill ... all 5000 lbs of it ( http://cgi.ebay.com/Fryer-MB-14-CNC-Bed-Mill-Milltronics-Control_W0QQitemZ150390712129QQcmdZViewItemQQptZBI_Mills?hash=item2303fc2741 )

It has electrical problems so I figure it will be a great candidate for a Mack 3 conversion!

Mike

2
Guess I should ask what the output of a servo drive looks like???

I was just assuming it is a pulsed output of either 80 volts with positive on one wire and zero on the other or vise verse  to get the servo to go the other direction ..... is this correct ????

Thanks ... Mike

3
If I want to go with the Gecko servo drives ( which seem to be the most popular ) ... what is the chances of just putting a final drive transistor ( a large mos fet) off the drive  ... OK, it is a little more complicated since it must go positive of negative but there must be a fairly simple circuit design to just drive more power out of these units ( 140 volts rather than 80 ) ??????

Thanks ... Mike

4
Looks like the machine has a Milltronics controller presently on it.  The machine was built in 1995.

The servos are: Milltronics Type- MT30M4-38 NO- S06279 C/Stall Torque -26 LB/IN 8.6 A Max -3700 RPM 140 V47

The only thing I was told is that the servos have been rebuilt a few years back.

The controller is back (or maybe the amp ) as the unit right now had one "run away" servo when powered up.

Thanks for the advice ... will know if I get it this week.

I figure at $1000 for even a "stripped" machine with no electronics, I will be getting a good deal ... ?????

Thanks .... Mike

5
Hi!

A few years back I looked at Mach 3 and what it took to hook it to steppers to work a small router .... put the plans on hold while I got married and moved across the US (married a woman who is parlayed and needs 24/7 care .... want to set up a small home shop to make a living while watching her .... http://mcsele.shutterfly.com ).

I have just found a small bed mill with bad electronics that may be a good candidate for Mach 3.

It has 3 axis servos as well as several MPG's, limit switches and such. 

First question .... is there enough outputs from parallel ports ( I assume I can still find / build a computer with two ports) to make a full blown mill work ?  What is the most cost efficient interface board made that I can use to interface the ports with the servo amplifiers / controllers ( may need new ones also depending on what is presently on the mill)?

If I need (or should) look at a motion control board, again, what is them most economical to use?  I see a few out there ( although most are for steppers and I need one for servos).  I am hopping to get the mill for less that $1000 and am on a very tight budget.  I don't want to spend several thousand on a board to interface the computer and mill.  Electronics is a hobby of mine.  Is there any plans or kits out there that would reduce my cost?

Any advice would be greatly appreciated!

Thanks .... Mike

 

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