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Well, congratulations!
Thanks for the update, looks like you are doing a proper job. That is quite a project you have taken on there.

 

 

hi all

used live cd to make a new install and update a old machine , it has a 5i20 card  in it. but on the new install there is no firmware installs in /lib/firmware

locate hm2 does not show any .bit files 

on startup you get
Debug file information:
Note: Using POSIX realtime
Could not locate firmware "//lib/firmware/hm2/5i20/SVST8_4.BIT". (No such file or directory)
hm2/hm2_5i20.0: firmware hm2/5i20/SVST8_4.BIT not found

the manual says
"search for hostmot2 in the Synaptic Package Manager."
but there is no such package any more

what is the correct fix or this? 

just copy old .bit files from old installs?


 

Good day,

So i would like to do a status update. I'm nearly finished with the geometry overhall.
Z Axis is complete
Y Axis is complete (But the Ballscrew is rough. Maybe it gets replaced later)
X Axis is in the process of scraping and aligning.
Sand blasted and painted a lot of parts
Cleaned the machine even more (but still a mess, just less



Spindel is still in progress.
The KM63 interface is fixed with new bearing and preload adjusted. But the clamping discs that clamp the spindle for turning/broaching is bend and needs to be reground. For now i will use it as it is to get the machine into alignment and if everything works with the original Maztrol i will start the conversion to LCNC and fix the rest of the spindle.

For now the progress wont be as fast as it used to be, because my son was born recently.
 

tuxcnc wrote:

viewsat wrote:

I'm showing four sets of drivers in the photos, but only this inexpensive DM542 has a problem
A long time ago, 3xTB6560 drivers were popular and I had them too.
There, PC817 supported not only dir inputs, but also step inputs. There were problems with this, but the chips were in sockets and it was easy to replace them with selected ones and it worked somehow.
So there are only two options:
1. Your driver is faulty.
2. This type of driver is poorly designed.
Either way, the cause is not to be found in riocore.

1.This DM542 was taken from my CNC engraving machine, which I'm currently using, for testing.
2.Although this DM542 is very cheap, I have used about 1,000 units, and its failure rate is very low, less than 1%. Most of the problems can be found as soon as they are powered on for testing.

meister wrote:

I believe you; I understand your problem too.
You could try measuring the voltages at the DIR pin (which can be held at a constant level) and comparing them.
Better still, use an oscilloscope to see how steep the edges are.
Otherwise, I’m out of ideas.

 

Meister, thank you for your enthusiastic response! Your Riocore is a great project and will exist permanently in the open-source CNC community.  

I believe you; I understand your problem too.
You could try measuring the voltages at the DIR pin (which can be held at a constant level) and comparing them.
Better still, use an oscilloscope to see how steep the edges are.
Otherwise, I’m out of ideas.

Using a Mesa7i92 + 74hc245 (5V) + dm542 (unmodified dir input pc817), the zero-point return is correct and without error. This is why I raised the issue of the Riocore + Tang Nano9k + 74hc245 (5V) + dm542 (unmodified dir input pc817) failing to return to zero.

I’d guess that with the Mesa card, the voltage is slightly higher than that of your level shifter, which produces a more stable pulse.
It must be right on the limit, as some pulses get through and some don’t; even 0.2 volts could make the difference.
All in all, I’d recommend not using the drivers – not with Mesa, anyway – as the threshold is too close to the limit.
Or you’ll need to switch to 12/24V so that the driver is triggered reliably.

If you have a variable power supply, you could try increasing the voltage to 5.5 V and see if that helps; the level shifter should be able to cope with that.

viewsat wrote:

I'm showing four sets of drivers in the photos, but only this inexpensive DM542 has a problem

A long time ago, 3xTB6560 drivers were popular and I had them too.
There, PC817 supported not only dir inputs, but also step inputs. There were problems with this, but the chips were in sockets and it was easy to replace them with selected ones and it worked somehow.
So there are only two options:
1. Your driver is faulty.
2. This type of driver is poorly designed.
Either way, the cause is not to be found in riocore.

Those are cute!
Been watching BattleBots since they started wayyyyy back, robot wars or whatever they were called then, when the remote control was at 27MHz and everything was discrete electronics.
Unfortunately never had a chance at it, even now ...well 3 years ago i called anyone and everyone who has anything to do with electronic trying to rally them into starting this, failed miserably.
Keep at it, just building something that works at that weight range is difficult, i would rather do the 250 LBS ones as there are more options to push stuff way beyond their limits.

DIR use pc817 Error!


DIR modified 6N137 ok!!

spent the last year actually using my cnc, and not to make more cnc machines, my cousin kept asking me to do this fight robot league with her son in highschool, so we went to an event and it was pretty cool so we've been tryng to do it ever since.
its a 1lb weight class, so 454g. its pretty hard because everything is dumb, rc shit is dumb, the drone shit is dumb. i had to find the closest software thing to linuxcnc i could find but its still shit by comparison. i have to use all these dumb materials, and do so many operations and fixtures, i have to make dumb custom motors, and stupid rubber molds. i had to buy and use an M1.6 tap...
i learned how to anodize thought, and its pretty cool.

 but im having a good time, except i keep getting destroyed by teenagers with 3d printers