Messages

1

Brains Development / Bad Logic

« on: April 13, 2016, 05:12:34 PM »

Looks like 1 AND 0 = 1.

2

General Mach Discussion / Re: 24V Signals

« on: November 10, 2014, 07:27:14 PM »

GBowes: here is a shorter version of the URL that TPS posted
http://bit.ly/1sx9sXo

(the long one seems to have been altered by the forum)

3

General Mach Discussion / Re: 24V Signals

« on: November 10, 2014, 08:02:20 AM »

Yes, the 24V side will be powered by an auxiliary 24V power supply. It's just that it looks quite simple, I was expecting a far more complicate solution

4

General Mach Discussion / Re: 24V Signals

« on: November 10, 2014, 07:46:32 AM »

Looks like it could handle the task. Did you use this or similar SSR for converting the signal voltage? I am not sure if I just plug the LPT on one side and the Berger driver on the other side and that's it, or I have to add some extra filters for the signal quality improvement.

5

General Mach Discussion / Re: 24V Signals

« on: November 10, 2014, 06:10:15 AM »

Hi TPS,
I assume you are referring to this product:
http://www.cs-lab.eu/en/produkt-21,4-Universal_converter_of_digital_signals_with_optoisolation__5V_input_voltage.html ?

6

General Mach Discussion / Re: 24V Signals

« on: November 09, 2014, 07:17:37 PM »

Well
The motors I am trying to use are Berger Lahr VRDM 3910/50 LWB (VRDM 3910 LW 4 Nm 230 V 2,00 A). They are driven by Berger Lahr WD3-007.0501 (WD3-007.0501 230VAC 24V-signal-input). The drivers were signaled by a Siemens PLC.
The driver in the link will not work.

There is a 5V signal version of the Berger Lahr (WD3-007.1501 230VAC 5V-signal-input) but the costs for the buying 3 units for 3 motors is ridiculous. I would rather buy modern servos at that price, the WD3 was released somewhere around 2003. The only chance would be to bump the LPT 5V signals to 24V, in theory even optocouplers would work. I was hoping somebody already went through this (being a common problem if you wish to use 24V industrial stuff via Mach3 and LPT).

Also, the specs of the driver:
Uhigh, min 20 V
Uhigh, max V 30 V
Ulow, max 3 V
Ulow, min -30V
Imax = 30 mA
Current Control
Ihigh, min 7 mA
Ihigh, max 15 mA
Ilow, max 0.2 mA
Ilow, min -25 mA
Umax = 5.25 V

7

General Mach Discussion / Re: 24V Signals

« on: November 09, 2014, 06:27:16 PM »

Yes, there are a couple of similar chips that act like that, however I couldn't find any exact implementation. I assume just putting the chip between the 5V from the LPT breakout board and the servo drive that expects 24V instead of 5V, would not be the most reliable way to do it.

According to the servo drive datasheet, the pulse width should be >= 2.5us and pulse pause >= 2.5us.

8

General Mach Discussion / 24V Signals

« on: November 08, 2014, 10:11:21 PM »

Hello,
I am trying to use some servo drives that require 24V instead of the LPT 5V stuff. Is there a simple way to convert the step/dir to 24V signals?
Thanks