uc300eth/UB1 Traveling speed lower than expected/set

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uc300eth/UB1 Traveling speed lower than expected/set

Postby Evgenij » Wed Nov 21, 2018 8:38 am

Hello,

I'm trying to configure UCCNC/UB1 for my custom machine and facing really strange issue.
I'm using Nema23 573HBM20-1000 Stepper with HBS57-Drivers and Ballscrew pitch of 5 mm.
I set following values for the x-axis in ucnc:
Kernel-Speed: 200kHz
Steps per Unit 800
Velocity: 14250
All Setting(General Tab) -> https://drive.google.com/open?id=1XC6mS ... HkoUkl5L6J
All Setting(X-Axis). -> https://drive.google.com/open?id=1JKnn1 ... qttov7WPrE

If I move x axis in ucnc for example for 10mm, than it moves for 10mm. BUT with max velocity of <3m/min instead of 14m/min.
I've made two short videos to show the problem. In first video you can see quick measurement with 17,5mm travel.
https://drive.google.com/open?id=1UsliB ... jq2XwWOGfu
The second one shows the max velocity/travel speed of 14,2m/min :cry:
https://drive.google.com/open?id=1UsliB ... jq2XwWOGfu

What can be going wrong here?
Evgenij
 
Posts: 2
Joined: Wed Nov 21, 2018 8:16 am

Re: uc300eth/UB1 Traveling speed lower than expected/set

Postby Robertspark » Wed Nov 21, 2018 1:24 pm

how are you moving the axis?

jogging , gcode or mdi entry?

your jog feedrate in those videos is 10% so it won't move very fast
Robertspark
 
Posts: 1892
Joined: Sat Sep 03, 2016 4:27 pm

Re: uc300eth/UB1 Traveling speed lower than expected/set

Postby Evgenij » Wed Nov 21, 2018 2:42 pm

Robertspark wrote:how are you moving the axis?

jogging , gcode or mdi entry?

your jog feedrate in those videos is 10% so it won't move very fast

Hello Rob,

yes, the problem was in front of the keyboard :lol:

Thanks for the help.
Evgenij
 
Posts: 2
Joined: Wed Nov 21, 2018 8:16 am

Re: uc300eth/UB1 Traveling speed lower than expected/set

Postby Robertspark » Wed Nov 21, 2018 2:46 pm

No problem, welcome to the UCCNC user group :D
Robertspark
 
Posts: 1892
Joined: Sat Sep 03, 2016 4:27 pm

Re: uc300eth/UB1 Traveling speed lower than expected/set

Postby Robertspark » Wed Nov 21, 2018 3:14 pm

here is a bit of test code that may help you out (in metric)

Code: Select all
G92 X0 Y0 Z0
G0 X20
G91
G0 Z25
M98 P200 L2
M98 P201 L2
M98 P202 L2
M98 P203 L2
G0 Y25
M98 P204 L2
G0 Y-25
G0 Z-25
G90
G0 X0
M30

O200
G1 X50 F3000
G1 X-50
M99

O201
G1 Y50 F3000
G1 Y-50
M99

O202
G1 Y50 F3000
G1 X50
G1 Y-50
G1 X-50
M99

O203
G1 X50 F3000
G1 Y50
G1 X-50
G1 Y-50
M99

O204
G02 X0 Y0 I25 J0 F3000
G03 X0 Y0 I25 J0
G03 X25 Y0 I12.5 J0
G02 X25 Y0 I12.5 J0
G02 X-50 Y0 I-25 J0
M99


if you are using a dial indicator you can position it at the start point (on the LHS...) and it will check for lost steps (+ backlash)
Robertspark
 
Posts: 1892
Joined: Sat Sep 03, 2016 4:27 pm


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