Retrofitting a small bending machine

Hi
seem to have stumbled into a little project.
 

I have already retrofitted my Maho MH500 and a cycle lathe to Linuxcnc
retrofitted, which is why a friend has now asked me to have a look
to have a look at his bending machine.

The press was probably retrofitted to a newer control system.
However, it has now stopped working and when I switch it on I get the error message

"WARNING LOST VIDEO TABLES"
 


if I google this I only find 3 forum entries, but without any answer or even a solution.
I can't say whether the controller is broken or "just" lost the programming or parameters...

In any case, I now need a replacement.
A simple 3-axis positioning controller.
The controller would only have to control 2 stops and the press stop.

all 3 axes have analog -10/+10V drives
there are probably 3 encoders somewhere for the position feedback
and that's about it.

I don't need cycles and bending programs.
If we get the 3 axes into the desired position via the control system and
then operate the press hydraulically as usual is enough...


If the machine were in my shop, I would say
Linuxcnc Raspberry, small TFT mesa card and I operate the thing via Gcode in MDI.

Maybe there is a simpler standalone solution?

DoWerna,
I have retrofitted a press brake with LinuxCNC.
You can checkout my forum topic Pressbrake CNC Control .
We are using it regularly for bending. I still have an issue with homing the backstop, but otherwise it is working good.
- Earl

www.gasparini.com/en/services/assistance/

DoWerna wrote:

Hi
seem to have stumbled into a little project.
 

I have already retrofitted my Maho MH500 and a cycle lathe to Linuxcnc
retrofitted, which is why a friend has now asked me to have a look
to have a look at his bending machine.

The press was probably retrofitted to a newer control system.
However, it has now stopped working and when I switch it on I get the error message

"WARNING LOST VIDEO TABLES"
 

if I google this I only find 3 forum entries, but without any answer or even a solution.
I can't say whether the controller is broken or "just" lost the programming or parameters...

In any case, I now need a replacement.
A simple 3-axis positioning controller.
The controller would only have to control 2 stops and the press stop.

all 3 axes have analog -10/+10V drives
there are probably 3 encoders somewhere for the position feedback
and that's about it.

I don't need cycles and bending programs.
If we get the 3 axes into the desired position via the control system and
then operate the press hydraulically as usual is enough...


If the machine were in my shop, I would say
Linuxcnc Raspberry, small TFT mesa card and I operate the thing via Gcode in MDI.

Maybe there is a simpler standalone solution?
 

What is your time frame?
This might come across as ridiculous but I can handle the whole thing on a $10 RPi Pico 2 + support devices

This chip has "PIO state machines" and I am reading 4 quadrature encoders with a maximum rate > 5M quadrature counts/sec without using any of the two cores' processing power.

One core of the RP2350 MCU handles the servo PIDs + velocity profilers and the other core handles video. Motor command is 12-bit +-10v

I have been designing/building metal forming controls (up to 21 axes) since 1988 and this is my latest development. Right now I have a bunch of CNC tube-benders to retrofit with this thing (3-axis and 5-axis) and the control development is on-going.

Just thought I'd throw it out there. 

Example of one of my tube bender retrofits  Microcontroller motion system and an Android tablet (protected) front-end