Problem with Z axis and G55 work coordinates

[jens]

Hello,

I m making progress on my mill conversion to MASSO G3. Great fun so far, will make a post on this when finished.

Today I have the problem that the Z axis that is not moving with the G55 command. Homing is Ok all axis moving to the sensors and backing the 10mm asked.

But on G55 X and Y are moving but Z doesn t. Looked at all the videos used the G92.1 but nothing helps.

Can someone help?

Thank you

Jens

 

[evermech]

Hi @jens

what are you typing in the mdi? And what is your z soft limit set to?

Guy

 

[jens]

Hello Guy,

Just had to wake up the machine to check!

So in the MDI I type M55 and enter and G55 is written in the to left corner off the screen so this looks OK.

The soft limits I had changed to -200 and +200 way more that what I do with the machine and is asked.

Can the problem come from the fact that I have no file loaded?

thank you

Jens

 

[evermech]

HI @jens

i would think that you would type G55 X0 Y0 Z0 and hit enter. It should rapid to your G55 offset which is X -150.0 Y-70.0 Z-50.0. Just make sure that there is nothing in the way. You could also just ask one axis at a time say G55 X0 and it should just do X axis.

I think that's how it works on Masso.

Guy

 

[jens]

Thank you so much, it is exactly like you said.

Problem solved.

Noticed another thing. The "go to home all axis" from the MDI page does not do the same as homing. The homing sequence is not respected. Here it start with Z down and X and Y together. (I had such a sequence at one time). This ist not real problem just something I will have to be very carefull about.

Thank you very much for your help.

Have a good day or night.

Jens

 

[breezy]

Jens,

It is quite standard to move the Z axis to the home position first and then move both X & Y axes together to the home position, in a move "all to home" operation. It is assumed that moving the Z up that it will clear all objects that maybe on the mill table.

When you enter G55 you move the WCS origin to the settings you enter in the F4 screen, which is what you are showing in your first picture, the machine is in its home position and the WCS origin is to the right, behind and down from its current position. Now all movement commands reference the WCS origin, so to get to the origin that you have setup, you enter X0Y0Z0 and MASSO will move to the origin and the WCS origin can be anywhere on the table. You only have to enter a WCS G5x once and that will remain operational until another G5x command is issued.

You should set the soft limits to the correct dimensions for your table so that MASSO can prevent crashes into the end stops. If you issue MDI G commands that will exceed the soft limit MASSO throw up a soft limit alarm until you issue a command that is "safe". Also if you are using a MPG or the jog keys/buttons, MASSO will slow down and stop at the soft limit point even if you are still winding the encoder, holding the key/button pressed.

Regards,

Arie.

 

[jens]

Hello Arie,

You again! So, you never sleep!

I had changed the homing position for the Z axis yesterday while trying to troubleshoot de G55 issue. Now I have changed it back to the top of the Z axis. Makes more sense and solves the issue with the All axis Homing.

Have set the soft limits back to correct values also.

Tank you for your help.

Jens

 

[breezy]

Jens,

I do sleep. I'm retired, so have some time to come and look here and the helpdesk between other projects I'm doing at home. Time zone here is 8+ UTC, Perth Western Australia. That puts me 7 hours ahead of you? (Depending on your daylight saving time).

I had trouble understanding G54 - G59 at first especially with Fusion as they use 0 - 6 for setting WCS in the manufacturing workspace. 0 being default which = G54, 1 also = G54, 2 = G55 through to 6 = G59. Once I got it into my head that WCS can be anywhere on the table, it all made sense.

Regards,

Arie.

 

[jens]

Ok

So now it is time to go to bed for you. I have the machine moving and can do hands on tests and it is getting "clearish" now.

Tiping code by hand to undertstand better, will move to fusion later.

Tryed to do some chips... see picture , oups. In fact it is ententionnal I will try to do some fluodrill. Lest see if I have enought horse power for that!

Tank you good night

Jens

 

[evermech]

That's great. Nice to hear you are willing to type commands into,the mdi I feel it's important to learn the Gcode ,and also to remember that you are controlling your machine. Your cam program makes the calculations easier but you have control over everything.

Guy

 

[jens]

Hello,

So using the right tooling and parameters for feed and rev the part turns out nice. It is 304 1.2mm wall thickness.

Now I realise that I have a big challenge ahead, that is to tap the hole. The tool for that is waiting on the picture. I haven t found anything about rigid tapping with MASSO so I will have to invest in an adaptative tap holder.

Masso support if you are reading: rigid tapping means synchronizing two axis like for lathe treading. Will it exist one day for milling?

Have a nice day.

Jens