The documentation for my Longer B1 40 watt diode laser says the work area is 450x440mm(17.72x17.32inch). So I setup a square frame tool to that size, home’d my laser, and clicked Frame.
Why am I being told the “motion exceeds the machine travel” when its the specs that Longer gave me for working area? Are these commonly inaccurate or something? Does Lightburn use some other specs than the machine provides?
This is not keeping me from work or anything. I’m just confused about why LB and Longer are not in agreement. I would like to be sure I have an accurate understanding of what the max size is for the materials I am using. Thanks!
Lightburn only knows what Longer (or you) tell it. Your controller is reporting that with the current distance command and commanded speed, it will exceed either the $130 or $131 parameter.
Let us be honest, when has an advertiser ever been 100% truthful? My S30 laser is advertised as “410x400”, yet I set $130=380 and $131=385 to keep it from bouncing off the rails.
But again, if I size my tool box that size, and hit Frame, I get an error…
<Idle|MPos:1.000,0.812,0.000|WPos:1.000,0.812,0.000|FS:0,0|Pn:P|Ov:100,100,100>
ok
Starting stream
ALARM:2
G-code motion target exceeds machine travel. Machine position safely retained. Alarm may be unlocked. (Right-click the ‘Devices’ button to reset the connection)
On or near line 1:
Stream completed in 0:00
Grbl 1.1 [‘$’ for help]
FW:LGT V1.2.3|MB:LS_ESP32
ok
[MSG:‘$H’|‘$X’ to unlock]
[MSG:Caution: Unlocked]
<Idle|MPos:1.000,0.812,0.000|WPos:1.000,0.812,0.000|FS:0,0|Pn:P|WCO:0.000,0.000,0.000>
ok
ok
Home the machine. Confirm the display shows X=0 and Y=0 (or very close).
Jog to the rear (Yaxis) until it ALMOST reaches the limit. It may have a mechanical stop. Record that value for “Y”.
Now jog it sideways (Xaxis) until the laser module ALMOST touches the machine frame. Record that value for “X”.
Subtract 5 from the “X” value and enter $130=[new value] in the Console window.
Subtract 5 from the “Y” value and enter $131=[new value] in the Console window.
Make your design box these new sizes and try to Frame.
Hum…“jog?” I don’t have a touch panel on my B1. I can use the “Move” panel/tab, but that seems to move by about a value of 10 each way.
I did this. I moved my tool square to Center of Page. Then I played with increasing the size in 2mm steps from 445 x 435mm (447 x 437, 449 x 439, etc.). The laser head successfully framed up to 449 x 439. But would not if I increased the size to 450 x 440.
I then moved my 449 x 439 tool square the XPos=0, YPos=0 position. That also framed successfully. But again, it would not if I increased the size of my tool square to 450 x 440.
It is likely the tolerance that your endsops have occupied.
In a Longer diode laser I have serviced once, 400x400 mm had become 365x400 mm, it fit with the dimensions of the laser head itself.
