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Messages - kf2qd

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1
Mach4 General Discussion / Re: mini pc
« on: February 17, 2024, 04:22:36 PM »
I am running a similar one running Win10 and Mach3 with an ESS and it works great. Doing some production work with it on a Sieg KX3 CNC. Performs at least as well as the desktop machine that was with the machine when I bought it used. (the desktop machine died)

2
So you home position is -x -Y. All your movements in machine space will be in +x +y. A router and a milling machine are the same basic thing. As Mach runs it shows where the cut is in the current workspace (G54, G55,...)

3
Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 15, 2023, 11:01:53 PM »
Well, Replaced the caps in the low voltage DC section of the drive amps and the next set of caps decided to blow. Some smallish tantalum caps made a couple of very nice bags and stunk the shop up. Looks like i will be needing to order parts to get this working. So I will have to get my KX3 sold to generate the cash for the next phase.

At least the High Voltage DC supply for the output of the drives is working. It is a couple half wave rectifiers and a string of large capacitors with nice copper bus bars down the top.  And the necessary relays and contactors for the high voltage DC section all seem to be behaving.

So now to pull the computer section, 2 boards with Motorola 68000 processors and the related memories. Will have to put them away and see what I might be able to do someday getting a 68000 computer to play with... Doesn't seem t be much demand for those boards these days. Probably others are doing the same thing I am.

Now begins the hunt for some tool holders. Not a lot of CAT30 stuff out there. Might need to look at BT30 and ISO30 but they will require changing the drawbar from 1/2-13 thread to 12mm. Should not be overly difficult, or modifying NMTB30 holders by getting rid of the straight nub on the end. Have done that with a NMTB50 for the horizontal mill at work.

4
Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 12, 2023, 08:48:27 PM »
The first batch of Bridegport Boss machines came with Inch screws. Shortly thereafter, they switched to metric screws. So they went from .2 inch pitch screws to 5mm pitch screws. That along with 2:1 belt drives between the motors and the screws. So the system sees 500 encoder lines for one rotation of the screw. 500 lines for 5mm. Y axis rotates the screw, X & Z rotate the nut, with the screw on Z being about 2" + in diameter at the top of the spindle.


Got the caps for the servo low voltage power supply and found a blown trace, the one cap really blew out hot, and will be trying it out over the next few days.

5
Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 10, 2023, 02:03:06 PM »
I am continuing to check things out and examining the wiring. Seems that the Drive Enable for this machine is to pull in the individual drive relays which makes the connection between the motor and the drive amp. Old transistor devices will allow that, the newer stuff with MOSFET and IGBT ouput stages would not tolerate that. I think my drives are not enabling because of the problems inside the computer section of the machine. been working on pulling the motors off so I can set them on the table for testing and not having to worry about what might run into an end stop.

Checking on the encoders - they are 250 counts per revolution, which because of the 2:1 ratio between the motor an the ball screw means I have, in a practical sense, 500 counts per revolution. As the ball screws on this machine are all 5mm pitch I am coming in at just about a thou per count.will work to start, but a 1000 count encoder seems like a better minimum count for this machine.

I have ordered some replacement capacitors for the DPS (Drive Power Supply) board. All the large electrolitic filter caps had blown at some point in the past. The power supply still seems to function ok, but the servos might behave better with cleaner DC power.

6
Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 08, 2023, 08:29:30 PM »
Yes they are encoders. BEI 250 line encoders. Might want to go for something with a slightly higher count. In 1985 they were pretty much the norm.

7
Mach4 General Discussion / Re: Bridgeport BOSS R2E4 Retrofit
« on: June 08, 2023, 07:10:22 PM »
The servo motors have an encoder on end of them. Don't know the number of counts at the moment. They should still be okay, but might want a few more counts per revolution.


8
Why do you have your accel set so high? Having the accel set as high as possible is not always the best setting. You might try turning it down, and seeing if that affects things in the real world where the tool is meeting the material.

9
Mach4 General Discussion / Re: Tool back into the tool magazine?
« on: June 03, 2023, 10:46:07 PM »
What happens if you end your program with M6T0? The macro only runs if you call it. Can you make a macro that runs on M30 or M02? that would call M6T0?

10
What are your axis accelerations set to? if you acceleration number is low, it will take a while to stop from high speed when releasing the jog button. As the Acceleration is turned set higher the movement will start and stop faster. If you turn the acceleration to high you will lose steps because the motors will not be able to keep up. Acceleration to low is better than to high, but closer to what your machine is really capable of is much better.

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