Emco PC turn 55 upgrade..

What is in the book is not necessarily what you have, I wont say it again.
Post a picture from where in the book it states they are 3 phase...
Post a picture of the damage to your driver card.
Check the stepper motors with a multimeter to prove they are what you think they are. (Youtube shows you how)

The computer although necessary is the least of your problems.
The mesa card is what will produce the signals that drive your motors and will do what linux cnc tells it to do.

Data sheet for motors? Test it fits?

james-mech wrote:

What is in the book is not necessarily what you have, I wont say it again.
Post a picture from where in the book it states they are 3 phase...
Post a picture of the damage to your driver card.

They are already in this thread. I won't attach them again.

You have one really bad picture where it is difficult to see anything....
You have no pictures from the documentation showing where it specifies 3 phase stepper motors...

Good luck!

Ordered the Mesa 6i25+7i76.

I probably should have looked for a capacitance tester earlier. So now I'm getting a better multimeter with capacitance and frequency and a bunch of other features. Hopefully I'll be threading with the Emco software by next week. The Leadshines aren't expected until the 21st.

I've read a little of the toolerator info. I was wondering if I can use an Uno instead of the Nano. I think I've got 2 of them around somewhere.

What is the difference from PC turn 50 to 55. I own a Compact5 that is very similar to the PCT50 and know the machine very well.
These 2 machines use strange Berger-Lahr 5 wire Stepper motors with 72steps/turn. If you have the same, I recommend to change it for better at least 200spt types with a matching driver, because with these motors the lowest step in Diameter and length is only 0,0138... mm. The tool turret is controlled with a simple DC-motor which have different currents for for- and backward turn. Forward you have for example 2A and backwards only 200 mA or so, that push the locking disc against the lock bar. You can change the DC-motor with a stepper motor, but I think its easier to switch a relay for maybe 0,4 sek to change
the turret to the next position. At the moment, I don't have assembled my turret, so I can't say, what current it needs for correct function.

I thought I read somewhere that the difference was in the spindle drive or encoder. I thought the 55 was the max swing over cross slide, but that is actually 59mm.

I have the 3 phase steppers and they seem to have plenty of speed and torque. Lowest step is .001mm or at least that's what it says on the screen. The normal rapid is 2000mm/min and maxes around 2250 at 120% feed override. I'm waiting for some new capacitors, to show up so I haven't checked voltages or anything, but I was thinking that I could eventually upgrade the power supply and run the steppers at 45V instead of 30. If I can get the same speeds with LinuxCNC I'll be happy with that.