Homing speed

westyone

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
 

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kiwicnc

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

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

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 :)
 

westyone

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

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

MASSO Support
Staff member
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
 

westyone

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

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

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