Messages

11

General Mach Discussion / Re: Motor changing direction at random

« on: January 10, 2021, 12:04:51 AM »

Yes, the motor reverses without a change in the direction voltage.

I'll have another computer to connect tomorrow, so that'll be interesting.

It could still be Mach3 

12

General Mach Discussion / Re: Motor changing direction at random

« on: January 09, 2021, 10:53:58 PM »

What is IC2 used for?

13

General Mach Discussion / Re: Motor changing direction at random

« on: January 09, 2021, 10:46:40 PM »

OK, without jog command: Voltage between GND and each (X,Y,Z and A axis) DIR parallel port input = 108.6 mV. GND to all DIR Driver outputs = 0.29 V. Voltage between GND - STEP //port inputs = 4.5 V; GND - STEP Driver outputs = 5.1 V.
When jog command, for positive direction GND - X or Y DIR input = 4.5 V, for neg direction = 108.6 mV

The voltage does not change despite a change in direction for the Y motor.

14

General Mach Discussion / Re: Motor changing direction at random

« on: January 09, 2021, 08:27:58 PM »

The parallel port is integral to the motherboard and not 5V I think. The slot I can use is 3.3V. Pls see the previously attached pics. Can I insert a universal PCI card into the 3.3V slot to supply 5V?.
If yes, I purchase a universal card to resolve the 5V BOB board supply before considering the next.
If no, what are the options; updated computer?

The BOB is not connected to a USB for its 5V supply but to a dedicated 5V 3A transformer. Pic of activated BOB attached.

15

General Mach Discussion / Re: Motor changing direction at random

« on: January 09, 2021, 07:56:44 PM »

I'll send the pics first

16

General Mach Discussion / Re: Motor changing direction at random

« on: January 09, 2021, 03:38:15 AM »

Thanks Tweakie, I'll check that in the a.m.

17

General Mach Discussion / Motor changing direction at random

« on: January 08, 2021, 09:48:53 PM »

I have recently connected my 3 axis CNC to Mach3 via 3 TB6600 drivers and a ST-V2 BOB. Everything is wired up correctly and Mach3 Config has been entered as per BOB installation instructions.

However, the Y axis motor changes direction at random with each activation of the jog command, either by hot key or from within Mach3. i.e when I press the Y+ command, the motor will start in any direction; Y+ or Y-. The next time I hit the Y+ command again, the motor might run in the opposite direction. The DRO however will continue to clock as if the motor is running in the Y+ direction. The same occurs with the Y- command but the DRO will continue clocking in the Y- direction. This problem initially happened only to the Z axis motor, but that seems to have resolved itself mysteriously and now occurs only to the Y axis. Both X and Z axes' motion are stable.

I have ruled out the TB6600s and the BOB by interchanging the Drivers and BOB axes pin connections, and changing the Motor Outputs pin values in Mach3 Config accordingly. It does not matter what channel I establish between Mach3 and the motors, the Y axis jog commands can not assure direction.

My computer's O/S (Vista) was reinstalled + memoryoveride.zip, as was Mach 3 (R3.043.062) and I also addressed the blue question mark after the Mach3 driver in 'Device Manager' with the fix in https://www.machsupport.com/forum/index.php?topic=38269.0. The blue question mark remains.

I've attached the xml file.

Do any of you have any suggestions?

18

General Mach Discussion / Re: Looking for good DIY controller kit supplier

« on: December 29, 2020, 01:10:37 AM »

That's correct, I assigned the other axes P2, P3 and P6, P7 connections and Mach3 Motor Output pins to the Y motor but the problem persists, so yes, it would have to be the Mach3 setup or the computer itself.

Before I start a new topic re BOB and driver setup in Mach3, I'll reinstall Mach3 to see if the Mach3 Driver installs without a question mark.

19

General Mach Discussion / Re: Looking for good DIY controller kit supplier

« on: December 28, 2020, 11:23:21 PM »

Made the changes as you suggested but as applied to the Y axis. Moved wires from P4 and P5 to P8 and 9, and reconfigured the pins in 'Motor Outputs for the Y and A axes. The Y channel still changes the Y motor direction at random.

Changed the Y Pul (P4) and Dir (P5) connections to the X and Z channels and random direction change of the Y Motor continues.

It would have to be a Mach3 setting or the computer , wouldn't it?

I checked all the soldered joints again ... all OK.

I also checked the Mach3 settings as per the BOB installation guide ... but the Device Manager/Mach X Pulsing Engines/Mach3 Driver computer icon has a Blue question mark. The ECG Savebase BOB User Manual states that the ? should not be there. Could this be the issue and how do I remove it?

20

General Mach Discussion / Re: Looking for good DIY controller kit supplier

« on: December 28, 2020, 12:08:43 AM »

Played with the system before the NY.

The Y channel switches the motor direction at random when the same Mach3 jogging hot key or the 'Fly Out' jog button is pressed. The Mach3 DRO keeps counting in the same direction despite the direction of the motor. i.e. press the forward jog, motor rotates in Positive (+) direction and DRO values advance Positively (+); press the same key again and motor may, at random, rotate in Negative (-) direction but DRO will still advance Positively (+).
I have swapped the TB6600s and the motors but the same happens to the Y channel. All wiring connections have been checked many times and are correct.
When interchanged, all drivers and motors work fine on the X and Z channels.

It's either the BOB, computer or Mach3.

What can I do to identify the cause?