Topics

1

General Mach Discussion / Y AXIS with 2x Ball Screw Alignment

« on: April 29, 2014, 11:01:40 AM »

Hi
I'm looking for some advise about how would be the best way to bring the 2 ball screws into alignment with each other, I have had some problems with Homing errors of approx 0.1mm so maybe with this can be a little better for what I'm looking at doing anything under <0.05mm would be ok.

As can be seen in the pictures the timing belt has adjustment on both the Top and Lower sides and equal tension on both sides would be required, My thinking here is that each of the Ball Screws must be sharing the load equally in both directions.

I'm also having thoughts about loosening the Taper lock on the Driven Ball Screw and somehow measuring how much backlash there is, perhaps this would allow me to find the sweet spot between both Ball Screws.

I'd appreciate any thoughts about how to go about this  
 
Breastfed

2

General Mach Discussion / MACH3 Pulse Frequency appears unstable (R3.043.066)

« on: February 15, 2014, 10:31:30 PM »

Hi
My 4 axis Router has been working fine in the past however I'm in the middle of reworking the control panel with an upgrade for the Home Switches and general tidy up. Now I maybe having a senior moment here but I have noticed the Pulse Frequency in the Diagnostics screen seems to jump around a lot and I remember this being kinda stable with only slight fluctuations of maybe a 100Hz or so but I never paid much attention to this. Now I see a Pulse Freq of constantly changing from 57639 > 58815 > 57675 and then it drops back to 925 > 83 Hz and repeats again 57639 .....
And last night while being away from the PC for 20mins, returning I found that Mach3 screen was no longer open ? a crashed is my guess !!

The PC is an All in One Hitachi Flora running XP Pro SP3
I don't suspect an over heating CPU > runs at around 45 to 48 deg C, Intel P4 @ 3.60GHz + 2GB of memory.
LPT1 > G540.
LPT2 > MB02-V6 BOB.

I recently added the iMACH III P2-S USB pendant this requires a dll file copied to the plugin folder and its good to go > Disable the plugin and there is no change

Pulse Engine is running at 60kHz and changing this back to 25kHz makes no difference.
I have run the Driver Test a couple of times and rebooted. 
The driver test is successful and shows the mach3 takeover "excellent" > Reboot
In the Mach3 screen The Driver says it was "Successfully initialised" > Pulse engine shows no change

I'm a few weeks away from completing the updates so its difficult to do a test run, perhaps its been like this all along and now I've just realised.... could you guys take a peek at your pulse engine in the diagnostics tab and let me know

Any suggestions would be appreciated

Breastfed

3

General Mach Discussion / setting up for the MPG2 pendant & MB02 breakout board

« on: August 03, 2011, 09:19:30 PM »

Hi all

I reckon I have missed something in my setup and perhaps someone would help out with the setup of mach3 and the MPG with the MB02-V6 from Homanndesigns

I basically followed this connection / wiring setup from the table on the first page
http://cnc4pc.com/Tech_Docs/guide_for_MPG4_over_LPT2.htm   ....
and used these Trigger & OEM codes
Trigger1 259 Select encoder jog on axis X
Trigger2 260 Select encoder jog on axis Y
Trigger3 261 Select encoder jog on axis Z
Trigger4 262 Select encoder jog on axis A
Trigger5 265 Select Step value 1
Trigger6 266 Select Step value 2
Trigger7 267 Select Step value 3
Trigger8 304 Set MPG jogging mode = do single exact steps

I'm trying to configure this MPG2/ MB02 in mach3, the problem I have is that the "Enable" button does not need to be depressed to have movement of an axis, meaning I can rotate the MPG and not depress the enable button and depending on the last axis that was selected that axis will again move with the MPG. Now if I depress the "Enable" and select another axis, again the above is repeatable for all axis's and the last selected axis while the Enable is not being pressed is still able to move from the last selected axis.

If I select any of the MPG2 buttons or rotate the MPG the "Diagnostics" page shows that the "input Signal current state" for port 2 LED's are lite up with each selection and turn on & off respectively (BTW most pictures &setups I see show that the "input signals current state" port 2 are all lite up, so have I got my setting wrong with the MB02v6 inputs either H or L and with mach3 and the active H or L setting ?)

My Diagnostics "Input signals current state" status are all off until the "Enable" is pressed and make an axis move... something tells me it should be all on and I did mess with this in the "Input Signals" and change the red cross to a green tick but something is yet to be discovered.

It all seems to work OK just the "enable" button has got be beat

appreciate the help
Breastfed