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fixed the spindle with a R1000 resistor between pin1 of the db25 plug and ground. all good now!

I'm afraid that the 56U is not supported. Or at least I did not add explicit support for this.

I do not know if the 56 series supports the PulseEngine V2 which I'm using to control the motion. You could try though.

In the source code there is a check , if the device is a 57CNC, which only logs a warning.
And there is another check if the "external pulse generator" is used.

Excerpt from the documentation

Pulse engine v2 supports two different pulse generator modules:
- Internal: similar to basic Pulse engine, limited to 25 kHz pulse frequency at 3 channels, uses built-in circuitry and pins
- External: new in v2, limited to 125 kHz pulse frequency at 8 channels, requires external circuitry to deserialize the data to pulses

yes, that actually helped! Machine is running with a stock cable now and all commands work as expected. Thank you very much!

Except when I shutdown, the spindle starts. That is very uncomfortable. Still trying to understand why this is happening here. Any hints?

Oh and in uccnc the step scale was 160 for xy, 320 for z, here it is 80 for xy and 160 for z. Well, that's not a problem I guess. Maybe loosing some accuracy?

I am only at the start stages, building the machine. Actually not dealing at the moment with CSS. I was wondering if the beta version ready for use. Eventually I installed 3.1.3. The Machine is DMC2 MINI from here: shariffdmc.com/product/dmc2-mini-cnc/ It needed many mechanical modifications that took some time to overcome.

Hi jjdege, by changing the pos-scale value, all the movements don't correspond to reality.
I solved most of the problems by changing the SERVO_PERIOD from 2000000 to 1000000.
I've also a problem in display section: MIN_LINEAR_VELOCITY = 0 MAX_LINEAR_VELOCITY = 50.00

Many thanks to all of you

bebe tart

Hi,
try changing the value in the .hal file

See also Mesa 7i96S and 7i76E and 7i95 and many other combos, but for a start 7i96S is the easiest to wire and quite cheap.

LearningLinuxCNC wrote:

John,

Yes it is the UPWM board. It is driving your pwm servo drives. The CMOS battery did die at one point but the parallel port is set up in epp mode. I am not sure why it is doing this. If you have any troubleshooting tips I would be glad to hear them. Could the eeprom be bad?
 

OK, so the scan of the parallel port is getting some random stuff, since it thinks it sees a bunch of PPMC boards there.
The FPGA on the UPC runs a checksum on the data loaded from EPROM, so if the red (load fail) LED flashes and goes out when power is applied, then it is accepting the firmware as valid.  If that LED stays on, then the firmware did NOT load.  First, check that the BIOS settings are for the parallel port to be at address 378, as that is what LinuxCNC is using.  If this is a PCI or PCIe parallel port, then the address will not be 0x378.  There are several versions of EPP mode, if the BIOS allows to select between 1.7 and 1.9 versions, try both.  If your parport cable is not rated for IEEE1284 operation, that can be the problem.
Oh, one other thing is there are some ppmc driver options that may need to be changed for the newer LinuxCNC version.
In your config file set, in ppmc_load.hal, on the line that loads the ppmc driver,
loadrt hal_ppmc timestamp="0x00"
try adding this to the end of that line:
< space> epp_dir=1
That might fix it.  This is documented in a comment in that file.

I'm not too sure what else to suggest.
Jon

subscribed .. curious about the outcome and further experiences.

venturing into embroidery myself lately, got a 2010ish 12needle chinese machine (in reasonably good working condition) standing round but neither time nor space to work with it. in the meantime learned a bit about design and software for it - a whole ecosystem by itself obviously - curious how and if you'd try to translate this to the (linux)cnc-world..

cheers,
markus.

Awesome, I’m really looking forward to your tool, and I think if this works out it’ll be an absolute game changer for lathes!I find all of this really interesting feel free to keep the camera running while testing and upload it somewhere. I’m pretty sure I’m not the only one watching this with excitement.A very cool project to make use of the time between the holidays.

Unfortunately, I never reach the speed set in the .ini file.
The motors move much slower than the set speed and make a lot of noise. If I set the same speed in the drive program, the command executes smoothly and without making any noise.
I'm probably doing something wrong in the configuration.

There are no premade RPi3 images available for download.

You have a couple of options.
1: Someone maybe able to make one, but it would require that person having access to a Rpi3.
2: Find someone with Linux knowledge who can also speak english and is willing to help.
3: Have a go following someone's instructions, all is not lost if you make a mistake.
4: Look into using grbl.

A bit of a warning regarding the RPi3, you may have latency issues, which there may not be a solution for fixing it. Increasing thread period may not give smooth operation.

Saying that you don't understand all the time wont help. I'm sorry I really wish it was different.

Yeah std breakout board, a lot of the generic Chinese one have a 0-10v converter. Mesa also sells something called spinx1 store.mesanet.com/index.php?route=produc...oduct&product_id=205 which could be connected to the 2nd port on the 7i92T.
Glass sensor would require a buffer circuit of sorts I guess, PCW would have the best advice regarding that.

I've been using an original 7i92 for years (the change was to a different FPGA for the T) and had no issues........plus a number of other cards as things grew


This how good the support from Mesa is. Some users have bought clones from AliExpress (I'd recommend the genuine thing) and he's been happy to help those users out. TBH PCW has helped me out when I got bored and tried to build a clone of a 7c81 based on a Spartan6 FPGA dev board. Which does work either via SPI to Raspberry Pi 4/5 or a PC with a parallel port using the EPP protocol.

You may find some forum users very biased towards Mesa, some build machines professionally and only use Mesa, other have converted a mill or a lathe....or many other machines that I have probably missed. But they all swear by Mesa products.
Not that there aren't other options, but it's the best way if you "just wanna make chips".

Just standard linuxcnc settings. You have Velocity and Accelerations settings for every axis in the ini file. Adjust them to your liking.