Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - 12strings

Pages: [1] 2 3 ... 19
1
General Discussion / Re: Closed loop stepper fault input
« on: September 13, 2021, 12:04:09 AM »
You should be able to connect all of the ALM- wires together and connect them to the PMDX-424's "COM" terminal on the EStop connector (J14).  Then tie all the ALM+ wires together and connect them to the PMDX-424's FAULT terminal on J14.  The PMDX-424 provides a pull-up on the FAULT terminal.  As best I can tell from the StepperOnline Y series closed loop stepper driver manual, a fault condition will turn on the driver's opto-coupler, thus shorting ALM+ to ALM-, which will then connect the PMDX-424's FAULT input to COM, which will disable the PMDX-424 same as an EStop.  And the FAULT going active gets reported to Mach4 same as an EStop.

2
SmartBOB controllers and dedicated accessories / Re: PMDX-411 Device Descriptor Request Failed
« on: September 12, 2021, 11:50:14 PM »
Is the PMDX-411 connected to anything on the 25-pin connector (or has it ever had anything connected to it)?  Or just to the PC via the USB cable?

What do the LEDs on the PMDX-411 show?

If Windows can't read the USB device descriptors, then the unit will probably need to be returned.

3
SmartBOB controllers and dedicated accessories / Re: Voltage problems with a PMDX 424. Motors not turning
« on: May 19, 2021, 11:54:18 PM »
Glad it was a "non-problem" :)

4
General Discussion / Re: Screen Load error
« on: May 19, 2021, 11:53:06 PM »
That screen set SHOULD be installed as part of Mach4.  Do you see that file if you look in your "C:\Mach4Hobby\Screens" directory?  Presuming that you installed Mach4 in the default location.  If not, replace the "Mach4Hobby" with whatever directory you installed it in.

For example, in my fresh version 4612 install I see these screen sets:
- Blank.set
- Engrave_Marking.set
- wx4.set
- wx6.set
- wxLathe.set
- wxPlasma.set
- wxRouter.set
- wsTangential.set


5
General Discussion / Re: 2740c microstepper
« on: May 18, 2021, 11:41:34 PM »
Where would you connect the +5V on the 2740c driver?  If you are looking for something to connect to the SP+/DIR+ pins, then you can use the "COM" pin on each PMDX-424 step/dir connector, and configure the PMDX-424 "step/dir common" to +5V.  Then connect the PMDX-424 step/dir pins to the SP-/DIR- pins (and configure the PMDX-424 step/dir as "active low".  Or as an alternative, you can connect the step/dir signals to the SP+/DIR+ and then connect the SP-/DIR- to the PMDX-424 "COM" terminal, and configure the PMDX-424 step/dir common for GND and step/dir polarity as active high.  There are articles on the PMDX FAQ site about this (https://faq.pmdx.com/index.php?solution_id=1010).

If that is not what you are asking about, can you give us a little more information?

6
SmartBOB controllers and dedicated accessories / Re: Voltage problems with a PMDX 424. Motors not turning
« on: May 18, 2021, 11:34:58 PM »
First question: where are you putting your ground lead of your meter when you are measuring those voltages?

So no 110VAC and no USB.  Presumably you still had your motor drivers connected when you measured that 2nd set of voltages on the PMX-424 connectors, right?  If that is not the case, exactly what did you have connected to the PMDX-424?  And what motor drivers are you using and how do you have them wired (both power and step & dir signals)?

If you really did have 15V on the step and dir pins, that might possibly have fried whatever output buffers the PMDX-424 has on it.  But first check the wiring.

7
Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX-126 Latching eStop
« on: April 29, 2021, 12:54:17 AM »
Quote
how to ask Mach4 to pause/restart the PWM
PWM?  Do you mean the PWM signal that controls the spindle speed?  Or do you mean the charge pump signal on port 1 pin 17 that tells the PMDX-126 that it is OK to enable its outputs?

And lets back up a step here:  What motion device do you have connected between your computer and the PMDX-126?  A PMDX-SmartBOB?  SmoothStepper?  Some other device?

8
General Discussion / Re: 3 out of 4 motors behaving weirdly
« on: April 29, 2021, 12:50:18 AM »
The 1 motor that works has its own driver that is not a TP6600, correct?

How do you have the TP6600s wired to the PMDX-422?

9
Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX-126 Latching eStop
« on: April 28, 2021, 01:27:13 AM »
Ahhh... just found my post from long ago about this.  See this thread (not that you are running LinuxCNC, but the PMDX-126 part pertains to you).

https://www.pmdx.com/PMDX-Forums/index.php?topic=521.0

10
General Discussion / Re: 3 out of 4 motors behaving weirdly
« on: April 28, 2021, 01:24:09 AM »
Are you sure you have the motor windings wired to the drivers correctly, and that both phases are connected?  I had seen these symptoms once long ago and I'm trying to remember what the issue was.  All I can think of now is the motor windings wiring - maybe one phase wasn't connected?????  My motor would start rough (like yours), and would seemingly pick a direction at random.  I'll post again if I can resurrect that neuron and remember exactly what my problem was.

Are these 6-wire motors?  If so, make sure you aren't using the center-tap wire.

11
Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX 126 with PMDX 134 with Gecko 203V with Avis Stepper motors and Mach 4
« on: April 28, 2021, 01:13:07 AM »
 Nope - you've got it backwards.  According to table 5 in the PMX-134 mannual, port 1 pin 2 is DIR and pin 3 is STEP.

12
Parallel Port breakout boards, motherboards, and dedicated accessories / Re: PMDX-126 Latching eStop
« on: April 28, 2021, 01:10:08 AM »
It has been a while since I've used a PMDX-126 board, but I *think* that if you have the PMDX-126 DIP switches set to enable charge pump, the PMDX-126 will keep the EStop signal active until it sees the charge pump signal (from Mach) stop.  So... how do you have the DIP switches on your 126 set?  If you are running Mach3, somewhere there is a setting to keep the charge pump active while in EStop.  You do NOT want that feature enabled.

13
Parallel Port breakout boards, motherboards, and dedicated accessories / Re: no power to G320X after sitting?
« on: February 12, 2021, 09:40:57 AM »
On the PMDX-126, pressing the "test" button is supposed to light up the EStop LED, and send the EStop signal to Mach. That tells Mach not to try and do anything.

As for no power - if you have voltage at your power supply but not at the power terminals on your G320Xs (have you checked with a meter?), check your wiring.  Does the motor power go through the large relay on the 126?

14
General Discussion / Re: Smart bob with stock Sherline 4 axis driver box?
« on: February 11, 2021, 12:16:48 AM »
A bit late, but... "4 pins for each axis"?  I"ve see motor drivers with 4 pins, DIR+/DIR- and STEP+/STEP- (or PUL+/PUL-).   Is that what you mean?  The PMDX-126 has 4 pins on each connector, but those are step, dir and +5V and GND.  In that case you would connect the step and dir pins and run one of the GND pins to the "ground" pin of the DB25 that you referenced.

Or am I totally missing something here?

15
SmartBOB controllers and dedicated accessories / Re: No synchronized position from motion planner
« on: January 15, 2021, 11:03:48 AM »
See Steve's post above, maybe if you can provide the PMDX log files that the previous poster did not, it might help them find the problem.

Pages: [1] 2 3 ... 19