Green Z-Table doesnt lift much weight.

[litterbox99]

I'm finally getting back to my 900x600 laser project.

My Green Z-Table barley lifts my vacuum bed of 15 lbs.

The table has a maximum lift of 50 lbs.

Vacuum bed = 14.5 lbs
Honeycomb bed = 16.5 lbs
Cutting material = 19 lbs

The scenario;

Starting at full lift, the table will bottom out without issues.

When trying to come back up, I get a slow grind/whine from
the stepper and it wont lift. I can get it to lift with some help
from me.

I can go up and down fine as long as I don't drop too far down,
lets say 40%, If I drop more than 50%, I get stalling when trying
to lift back up.


My set up;

LO X7 DSP, 36vdc 10amp supply,

3MD560 driver set to;

Current 5.2a, standstill current 50%, 4000 step/rev

Software set to;

14.0 UM, Z home/work speed 200, start speed 15.0, max
accell 200, max speed 300.

Is my issue mechanical, software settings or driver issue ??

[Tech_Marco]

A little fine tune is required on the parameters:
1) Set the micro stepping to 1600 and fine the 'Um' value.
2) Set Z speed to '5~8mm/s'
2) Set Z acceleration to 100~300 range.

Give it a try

Marco

[litterbox99]

Thanks, but it didn't solve the issue, just made it
unbearably slow. I'm going to look at it from a
mechanical view.

[Tech_Marco]

When I get some spare time, I'll setup one up here in our office and will tell you exact what parameters I used
My office in under remodeling and I need to prepare a preparation for our new developed turnkey machine, the PRO530. So, I'm a little busy here

Marco

[litterbox99]

I removed the belt and turned it by hand, didn't seem
to bind up. I did notice two "E" or "C" clips were missing,
but not a factor.

I just need a bit more torque, perhaps I could run it
at 48vdc ?

[litterbox99]

Problem solved ! My mistake, I am so embarrassed

Going over my work, I discovered that the dip switch(s) for current
control was actually set to min rather than max, I had them inverted.

Going strong up and down. Lifting plenty of weight !

I guess my old lady is right, I need glasses.