Homing speed

[westyone]

Hey boys - This is a lathe. I have the Masso homing nicely but the speed between X and Z is painful. X homes well but Z is a crawl (I mean a real crawl. You can hardly see it moving). And with a 30 inch bed it takes 5 minutes.

If I up the homing speed for both the X over travels (6 inch travel) and hits the hard stop.

Axis calibration has been completed for X & Z.

Is There a solution to this?

Cheers

 

[kiwicnc]

10 inches per minute is slow

I return at 100 inches per minute

but you have to ensure your steps will allow that

Ray

 

[evermech]

@westyone

another suggestion is to make sure that the X axis prox. If your using a prox is set pretty close to the target so it sees it good and early. Then you can bump the speed up

Guy

 

[machinedude]

seems like your loosing steps? your Z axis is the heavier of the two so knowing the type of motors and size of them might offer some more clues. could be just a tuning issue on the Z axis or it could be undersized or even under powered and not getting to if full potential if they are running on a small DC power source if it is a DC system even? need some more information to offer anything better than a guess and what my gut thinks

 

[ecs]

@westyone

Have you tried increasing the acc and dec setting on the axis page? Not sure if this will help.

Josh

 

[westyone]

Thanks for the input guys - This is an 80v 6amp twin driver system connected to NEMA34 steppers. The pitch of the lead screws are different between Z & X but I expect the calibration wizard found that.

Both stepper motor drivers are set at 400ppm. The X axis rattles like hell during Homing but smooth after that, Z is perfectly quite?

Must be a driver to Masso configuration glitch.

Back to settings I go.

Regards

 

[machinedude]

could always put an indicator and check to make sure the machine s moving what the controller tells it to move to double check things.

 

[masso-support]

Hi Westyone

Try setting your X axis maximum speed in the X axis settings page to 10 ipm and leave your Z axis at it's high speed setting.

Then set your homing speed to one that suits the Z axis but the X axis should still only move 10 ipm. There is no need for such a short axis to move at high speed as it will be uncontrollable if you are moving it by hand

Hope this helps

Cheers

Peter

 

[masso-support]

@westyone whats your micro-stepping settings for both motors?

 

[westyone]

Quote from MASSO Support on August 14, 2019, 11:40 am

Hi Westyone

Try setting your X axis maximum speed in the X axis settings page to 10 ipm and leave your Z axis at it's high speed setting.

Then set your homing speed to one that suits the Z axis but the X axis should still only move 10 ipm. There is no need for such a short axis to move at high speed as it will be uncontrollable if you are moving it by hand

Hope this helps

Cheers

Peter

Thanks Peter. That does work.

Cheers

 

[westyone]

Quote from MASSO Support on August 14, 2019, 9:03 pm

@westyone whats your micro-stepping settings for both motors?

Hi Peter - My Stepper drivers use DIP switches to control amperage and PPR. Currently both axis are set for 2 amp and 400PPR.

Question - When using the "Wizard" on a lathe for setting X axis screw pitch, do I enter the linear distance or the radial (1/2 linear)?

I tried linear but now seem to have lost half the travel before X "Soft Limits" reached?

I can't see a setting that is chosen for Radial or Diameter programming.

Best Regards

 

[masso-support]

when you have the ballscrew pitch info, then it's best to just use the pitch data to calibrate and not use the wizard.