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  • tommylight
  • tommylight's Avatar
24 Feb 2025 17:18

Using transformer with 3 28.5V secondary windings to supply 57VAC/80VDC

Category: General LinuxCNC Questions

I am sure i answered this on the other topic.
But since internet has become a cesspool of bad information, you have every right to doubt me.
Just in case:
-normal metal core transformers can withstand a lot of overload, granted they do not exceed the isolation melting temperature
-stepper drives do not pull 5A from the transformer for a 5A motor, and yes the motor gets 5A easily but the drive might pull a single amp from the transformer. This is an EXAMPLE!!!
-the above depends hugely on the motor and drive voltage
-etc
  • Beovoxo
  • Beovoxo
24 Feb 2025 17:01
Replied by Beovoxo on topic Deckel FP4A Retrofit

Deckel FP4A Retrofit

Category: Milling Machines

The cabinet control relay holder with boards. 
the box is just 3d printet and the relay boards are from ali..ex...press for like 2 Euro.

 
  • PCW
  • PCW's Avatar
24 Feb 2025 16:58

7i95t pin and firmware files with Stepgens and Inputs 5Axis BoB

Category: Driver Boards

Its is exactly the 5ABOB config for the Sainsmart 5 Axis BOB with an added stepgen
on DB25 pins 1 and 14 (removing the PWMgen from pin 1) all other pins are GPIO
  • unknown
  • unknown
24 Feb 2025 16:26

Float precision for Ultra-Precision applications

Category: General LinuxCNC Questions

Yeah but someone starts a topic mentioning half a nanometre it's going to raise some interest. It's getting around to the level of the CMM NIST has in the US.
Precision is interesting whether it's a machinist hitting tenths on a manual lathe, a grader operator nailing a sub roadbed to the millimetre, the construction of the bridge over the harbour in the capital of my state or the work of Brunel in the 1800s.
  • bnet
  • bnet's Avatar
24 Feb 2025 16:18

Fanuc Serial Pulse Coders - Red cap servos, mesa 7i76e, how to?

Category: Driver Boards

Could StepGen be used to convert the absolute position data from the Fanuc encoder channels to quadrature pulses for outputting to encoder input on the drives? 
  • Sziggy_NC
  • Sziggy_NC
24 Feb 2025 16:16
Replied by Sziggy_NC on topic +-10v setup 7i97 & .ini

+-10v setup 7i97 & .ini

Category: General LinuxCNC Questions

Cincinnati sabre 500. A simple 3 axis machine. The tool changer pivots on two hinges to swing the carousel under the spindle. It's resembles an arm bring a glass to a mouth.
  • Nathan40
  • Nathan40
24 Feb 2025 16:14

7i95t pin and firmware files with Stepgens and Inputs 5Axis BoB

Category: Driver Boards

Hi,
Thanks for your file. Please confirm if it contains the input pins information for 5 Axis BOB.
If not, please add the same.
  • PCW
  • PCW's Avatar
24 Feb 2025 16:04

Which combination of mesa cards should I use?

Category: Driver Boards

If the resolvers connect to the drives (expected with AC servos) ,
a 7I49 is not needed (or useful)
  • PCW
  • PCW's Avatar
24 Feb 2025 16:00
Replied by PCW on topic Mesa 7I96S and Proximity Switches

Mesa 7I96S and Proximity Switches

Category: Driver Boards

Yes, assuming:

Black is out
Blue is ground = 24V common
Brown is +24V
  • PCW
  • PCW's Avatar
24 Feb 2025 15:53

7i95t pin and firmware files with Stepgens and Inputs 5Axis BoB

Category: Driver Boards

7I95T firmware for 5ABOB but with added stepgen on pins 1,14
(so 12 total)

 

File Attachment:

File Name: 7i95t_6ppst.zip
File Size:307 KB

 
  • tommylight
  • tommylight's Avatar
24 Feb 2025 15:46
Replied by tommylight on topic Float precision for Ultra-Precision applications

Float precision for Ultra-Precision applications

Category: General LinuxCNC Questions

Is there a way to change that to double precision floats (64bit) without having to rewrite the whole control?
 

This is his original question, that we did not answer, so he is right.
While waiting for someone that can answer that, you might want to have a look at the source code, it is on github:
github.com/LinuxCNC/linuxcnc
Also, these might or might not help:
forum.linuxcnc.org/38-general-linuxcnc-q...ming-milling-machine
forum.linuxcnc.org/38-general-linuxcnc-q...cision-home-switches
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