Messages

1

General Discussion / FEED RATE NOT CHANGING

« on: July 30, 2019, 05:07:25 PM »

I thought this topic had been covered but I can't find the solution.

I'm running Mach4 Hobby on a PMDX411 and after I upgraded from Mach 3 I can't seem to change my feed rates. Even after I disabled my FRO and RRO sliders I still cannot get my feed rates to change. I've attached my profile.

Joe

2

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: April 13, 2018, 12:09:41 PM »

Here's an update on the lathe spindle speed issue:

Steve Stallings of PMDX recreated the same issue on their lathe. Here is his reply:


>>>I have reproduced your problem on a system here.
 
>>>Everything works properly on a Mill configuration using a G540 config
>>>with PWM on pin 14.
 
>>>When I run a Lathe configuration, I see symptoms similar to what
>>>you described.

>>>W>hen I take our sample Mill profile and set it to Lathe Diameter mode
>>>>it does seem to work. Something is fishy here.....

A few days later Steve came back with the following work around:

>>>>Open the page at   Config > Mach and it will default to the General tab.
 
>>>>In the second column of options at the bottom is a block called Spindle Mode.
 
>>>>Click on Constant RPM and the Apply.
 
>>>>This should make it possible to control your spindle speed. It does not
>>>>solve the issue of how to actually do Constant Surface Speed. I am looking
>>>>into how that works. Seems very few people know and I need to talk to the
>>>>right guy at MachSupport.

So, here I am on MachSupport!

I am running March 4 Build #3481 with a PMDX411 SmartBob [Rev A PCB] with SmartBob USB PlugIn version 0.52.254,  SmartBob USB Bootloader version 1.13.73, and SmartBob USB Firmware version 0.58.205.

Any ideas, anyone?

Joe

3

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: March 01, 2018, 11:29:54 AM »

Hi

This is a message from Steve Stallings at PMDX. Steve reproduced the problem on one of their lathes. It looks like the spindle runs fine for Mill but not for Lathe.


Hello Joe,
 
I have reproduced your problem on a system here.
 
Everything works properly on a Mill configuration using a G540 config
with PWM on pin 14.
 
When I run a Lathe configuration, I see symptoms similar to what
you described.
 
This is going to take more work to figure out where the problem is
happening.
 
Regards,
Steve Stallings
PMDX

4

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 21, 2018, 02:41:58 PM »

I reopened Mach3 and measured voltage across Pins 7 & 8 as follows:

RPM     V

100      1.5
300      2.4
500      3.8
700      5.3
900      6.7
1100    8.1
1300    9.5
1500    10.8

I assume this is what one would expect. Under manual control varying the Hz changes rpm proportionally. It looks like only under Mach4 the voltage is a constant 6.6v. There is one thing I noticed in Mach3 (not having run it for a month or so). Spindle acceleration is very slow; on a new S command, rpm drops around 50% before it slowly climbs back up to the commanded rpm. However, it does reach this rpm. Not sure if this has anything to do with Mach4 not recognizing S commands.

Joe

5

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 21, 2018, 02:37:17 PM »

I reopened Mach3 and measured Pin 7 and Pin 8 voltage at varying rpms as follows:

RPM

6

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 21, 2018, 02:20:50 PM »

Thank you so much for your detailed write-up and correction of my screw ups!! I've made all the changes you suggested.

I did measure the voltage on pins 7 and 8 and I think this may be the issue. All the way from 300 rpm up to my max 1500 rpm, in increments of 200, the voltage was a flat 6.63 volts. I assume there is a linear relationship of voltage to rpm.

Joe

7

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 13, 2018, 02:18:41 PM »

Here is my wiring diagram for a NOWFOREVER E100S and my Geck540 with the connections to pins 5-9.

8

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 13, 2018, 02:16:29 PM »

It doesn't look as if my reply went through.

I am attaching my profile file along with a wiring diagram for pins 5 through 9 on my Gecko540 (next post).

Thanks for your help

Joe

9

General Discussion / Re: PMDX Configuration with G540 and VFD

« on: February 09, 2018, 04:16:03 PM »

Steve

I set  up the PMDX411 and I seem to have the same issue described here. My spindle speeds up to max rpm with no way of controlling the speed via S. When I go to the Output tab and enable Spindle Fwd and Rev as suggested, and select SmartBob as the device, no pins are now available.

My spindle config is PWM on Pin 14 (Gecko540) at 50 Hz, rpm estimated from PWM output.

My Inputs #1 through #4 are pins 10 through 13, with x in the Active Low col, Index is on Pin10, Motor Homes and Limits are on Pin11, Index on Pin 10 and EStop on Pin 15. Spindle at Speed and Spindle at Zero are set on Pin 11 (not sure if this is needed or correct), all with x in the Active Low col

Output#1 is Pin 17 and Output #2 is Pin 1 with x in the Active Low col. and Charge Pump is on Pin 16 with x in the Active Low. I have 0 in Min rpm in the Spindle tab and 3000 as max rpm.

On m3 s200 the spindle runs straight to around 2900. I have no control over changing the speed.

Any ideas?

Joe