PLM 1000/PLM 2000 Mechanical Specs

Travels/Work envelope:

• X: 12.0"
• Y: 6.0"
• Z: 9.0"

Table Size:

• X: 19.5"
• Y: 6.0"

Table T-slots:

• Number of slots: 3
• T-Nut Size: 3/8-16 - 7/16 (11/16 base)

Spindle:

• PLM 2000: 5000 RPM 1HP
• PLM 1000: 10000 RPM 1HP

Both use R8 collet spindle.

Spindle Options:

• Automatic Clamp/Unclamp option, that requires compressor.
• Rack-style ATC for 4 tools. Also air-powered.

Dumping all available PLM 1000 and 2000 docs here.

Just finished setting up the 4th axis.

That table is starting to look a little crowded.

Programmed and machined a T-800 head from thingiverse:

Here is a finished scull video from all sides: https://youtube.com/shorts/mdclf5LvdyM?feature=share

In the 1st op I milled the base with a 1/4-20 tapped hole right where my Z0Y0Z0 will be.

Then I mounted the base on a square fixture using the tapped hole. This way as I index the square fixture in the vise, my part Z0Y0Z0 remain in the same spot.

2nd op was the back of the scull

3rd op was the face, and the 4th and 5th were the sides

Here is a YouTube video of some of the 3rd op machining. Warning Loud Noise!

Did some testing for HSMAdvisor in A36

Tool: 3/16" 4 FL 0.25" LOC 0.7 Stickout

RPM: 5000 Feed: 32.0ipm

Original engagement DOC:  0.25, WOC: 0.083

Was successful and sounded nice, but the TTS holder started to pull out. Had to half both DOC and WOC for the video:

Machined this 2-piece utility knife on my ProLIGHT2000 benchtop CNC.

Just one little lock left!

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Finally got my proLIGHT CNC Mill running with UCCNC control software.

Chose that over mach3/4 because uccnc software seemed better made. Unfortunately, it too has bugs.

Most importantly, executing gcode.
Instead of running all codes in a block simultaneously, it does them in the incorrect order.

For example, code like

Instead of going to X0 Y0 defined in offset #54, it will go to coordinates of offset #55!
Only after executing that line, the offset will change to G55.
Similar issue with

Don't need to tell you this may lead to crashes.
So I changed the MasterCAM's post processor to output some of the codes in different lines.

Hopefully, devs will fix this issue soon.

In other news, I have just finished the first 2-tool piece.

It was a miniature skull figure made out of aluminum:

I got 150 bucks for machining that for a guy I met in a Facebook group. Nice!

The smallest endmill was 1mm ball nose, and it held up perfectly at max RPM of 5000 and feed rate of about 25ipm.

The DOC and stepover were about 0.004"

Now I wish it had a 20k spindle. If I could run at 100ipm, it would make a quick work of that little piece.
This way, it took 1 hour, which is not too bad either.

Cheers! 

After almost one month of waiting for parts, tracing wires, testing, soldering, and assembling. Here is the finished product!

Milling case hardened t-slot nuts:

Quick Tool change action with Tormach TTS holders:

Having done all the motor tuning and testing on the table, it was time to mount everything inside the machine enclosure.

I cut the heatsink to size enough to house four drivers, laid out some mounting holes, and drilled and tapped them M3.
Then drilled clearance holes in both the heatsink and the board and joined them with some 19mm long brass standoffs.

Drilled a hole in the enclosure for the motion controller mounting and LAN cable connection.

Then the main board containing drives and the power board and the breakout board were installed in the machine.
At this point, I realized the drive mounting scheme I chose was a mistake because it was a lot more challenging to connect the wires to the drive terminals so deep and so close to the enclosure. It helped to unscrew the main board, pull it out a little, connect the wires and only then push it back in and screw it to the wall of the enclosure.

Traced all the black cable going to the fuses and found which ones control the spindle and which ones go to the appliance plugs.
By fiddling with the controls on the front of the machine, identified all the wires and their functionality.

The Gecko G320X drives use the same (ERR/RES) pin controlling the drive fault reset and the error status.
When the drive is at fault (every time you startup or when the motor loses too many counts), it has a ground voltage of 0. If you pass +5v, it will reset the fault and enable the drive.

So I had to re-use the red cycle stop button to pul it to +5V when the machine is started. To sense the drive fault and stop the machine I used pin 12 (pull-down) on the C11G BOB. So when any of the drives pull ERR/RES to ground, the C11G board and mach4 react to it like an E-STOP.

The motors mounted back, and the encoder wires soldered directly to the data cable wires of the same colors. For that, I cut off the bulky DB-25 connectors.

Pay attention to the property belt tensioning. According to the manufacturer, the belt should sag a maximum of 1mm under the pressure of about 3 pounds applied at its middle point.

With everything connected, it is time to test the machine. See how it homes and runs!

Finally got all the parts a coulple of days ago and by now have connected everything on the table.

By accident ordered a wrong mounting plate for the encoders and decided to design and 3d print themon my own. In the morning I had 3 brand new encoder mountings!  

By trial and error figured that it is best to leave the default encoder count to 2048 PPR. With that set, the servos are very stiff yet quiet. Almost no dithering.

Managed to connect the spindle control and have it turning CW at programmed speed. Yet can't figure out how to run it backwards:(

I have been hunting for a very rigid but small machine for the last year or so.

And when I finally found one for sale on an auction in Minnesota, I could not pass.

Now the machine is in my garage.

It is a surprisingly heavy machine with a solid epoxy granite frame.

The features are as follows:

• 1.5HP 5000 RPM spindle
• Closed loop servos on all axes
• Power draw bar and a rack tool changer assembly

I built a table with casters for it and upon plugging it to a computer it turned out that.... It's dead!

The proprietary Animatics control in the back is not working, which means 95% of all electronics in the back must be replaced.

I was actually almost hoping for that because the original software is DOS-only. It is hardly convenient to work with it.

I want it to work under mach or LinuxCNC

So I ordered the required parts online and when all of them are here, I will start the retrofit process.

I will be documenting my process in comments.

Wish me luck!