Need help with a Paxton Patterson training mill!

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20 Aug 2015 22:35 #61590 by seabass
Hello im new to the forum and Linuxcnc. I just got a Paxton Patterson training center mill that is in really good condition. The sad thing is that all I got was the mill no software or the PCI card that serves as the controller. I have contacted the manufacturer and they want $350 for the PCI card, $250 for the software or I can pay $875 to get the updated equipment and software for windows 7. They even want me to pay $100 just to change ownership in there records before I receive anymore support. I only sent one email and only recived one email from them and their telling me that I have to pay $100 to get anymore support!!! Wow thats crazy what a bunch of vampires. I mean come on the machine is more than 10 years old. Sorry I just had to get that off my chest. So that is the reason why I'm hear. I need to find the best most cost effective way to get up and running. So my questions are. Can I somehow use the optidriver board that is located inside the mill itself? Through my research I haven't found much but I did find a little bit about how that the parallel port on the original PCI card does not match up directly with the pc's parallel port "by this I mean the pin out changes when it reaches the other side of the PCI card." So if you were to go directly from the PC to the optidriver(the mill) it will burn up/ground/short stuff out. I'm pretty sure I can use the power supply and board thats in it. Its titled Power 36, I know it works because I can run the machine in manual mode. Finally if I cannot use the driver board thats in it which driver board would you recommend? I also should add that I am extremely electronically savvy, I can do any kind of soldering even BGA, I can identify any part on a circuit board and what it purpose is, that being said if I cannot use the optidriver board then will I be able to repurpose any ic's or parts from it to create my own driver. I do apologize for such a long post like I said this field is kind of new to me. Thank you so much for your time.

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20 Aug 2015 22:51 #61591 by ArcEye
Hi

Paxton Patterson sound like the US version of Boxford over here in the UK.

They specialise in training CNC machine for schools and colleges, will not deal with individuals or anyone who has not got an unrealistically large budget to throw away.
Their machines cost thousands of pounds new, plus multi thousand pound training and support packages.

Then they hardly get used and hit the second hand market at bargain prices, but no software, support, no nothing.

I have 2 such quite large machines, which are very well made.

The answer is to utilise all the existing mechanical components and what electrical ones you can and replace the controller with Linuxcnc.

It is much easier than converting a manual machine to CNC, you have everything there below the breakout level usually, just needs connecting up differently.
If there is an on board processor board, then you have to hack in and patch into the outputs and divert to where you want them, but all quite do-able.

Certainly can be done for far less than their proprietary software

Thats my advice

regards

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20 Aug 2015 23:17 #61593 by seabass
Well I have to say man did you ever nail that right on the head. You see my father just recently retired from our local school district. Just before he left they had shut down the shop and drafting classes. So they let him take the mill and a matching lathe for FREE! They were barely used, I remember when I took drafting class there it was just a couple of years after they got the machines and I had to learn auto cad 2000 for almost two years before they let us use them. So yeah I'm definitely going to take your advice seriously to be truthful you are thinking the same things I am, screw paying all that money when it can be fixed for no more than $75US. I actually just found a post in another forum giving the pin out for the optidriver boards parallel port. So that solves my problem of hooking up straight from the PC and I won't have to buy another driver board or repurpose parts to make one. No just need to figure out how to hack the optidriver board like you said, but I'm not the best at programming.

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21 Aug 2015 01:44 - 21 Aug 2015 15:24 #61601 by cncbasher
additional info may be found here , if you have not already found it .

www.cnczone.com/forums/benchtop-machines...59-cnc-software.html

should be a straightforward conversion , so long as what you have does indeed work

the easiest is a simple breakout board , and use the xylotex config in linuxcnc , and match up to that
the main problem is finding what actual stepper driver signals it needs some are 12v TTL and will need dropping to 5v for a pc
parrallel port using a simple transistor buffer or an opto on the step and direction lines , or in fact all .

see how you go , if your not sure ask
Last edit: 21 Aug 2015 15:24 by cncbasher. Reason: missing link

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21 Aug 2015 02:46 #61604 by seabass
ok so I have found some really good info here
en.industryarena.com/forum/cncmill-paxto...workable--19359.html
Both pages of this thread are just what I was looking for. I'm going to go ahead and solder up the cable now. Once I get to where I can safely connect the PC I will try out the xylotex config in linuxcnc. Thank you guys so much for your help I will report back as soon as I get this done.

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21 Aug 2015 14:46 #61614 by ArcEye

ok so I have found some really good info here
en.industryarena.com/forum/cncmill-paxto...workable--19359.html


Just shows the dangers of assumptions.

When is a DB25 cable not a parallel port cable? When it has a 5v feed on pin 25 and a whole load of other inputs and outputs on pins 18-25!!

You will need to use a second PCI card to get sufficient I/O ( assuming it does have 4 motors plus all the individual switch inputs )
if you junk the controller card altogether.

That is the best option, get rid of the existing interface and connect the machine side of the DB25 to breakout boards that can connect to the computer via real parport cables.
If you have separate stepper motor drivers in the machine and some sort of spindle motor controller, you are pretty much already there

regards

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21 Aug 2015 23:18 #61623 by seabass
ok so I've decided to make a PCB that has 2 female db25 connection and I will be using regular cables on it. The mill already has the drivers for the spinal and the 3 stepper motors. It looks like its using some atmel ic's and Darlington ic's. I want to post some pictures for you guys. What is the best way to post pics on here? So I got my work cut out for me. I'm currently building a custom pc to run this and designing this PCB for the parallel cable. So yeah just let me know how to post so pics and I will be able to let you guys see everything.

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21 Dec 2019 23:49 #153007 by rocr
Hello there,

did you ever figure out how to get these machines gog?

thanks,

Ron

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