SB3 jog weird problem. Program in inches but jogs in MM

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New2allthis
Posts: 9
Joined: Mon Dec 26, 2022 8:12 pm
Model of CNC Machine: shopbot prtalpha

SB3 jog weird problem. Program in inches but jogs in MM

Post by New2allthis »

We bought a used 2006 alpha prs 4x8 CNC machine. Im guessing it uses a version SB3 from that time period.

\We moved it from the original company working correctly according to the tech that helped us.

My shop bot 3 software doesnt calculate jog correctly. After an afternoon of testing by the machines original operator he concluded if the SB3 software gets a job command in the g code to move 8 inches it moves 3.41. Which is the distance of 8 mm not inches.

When given a manual input signal to " move " or in a g code it works fine. When given a manual or g code signal to " jog " it seems to move in MM not the inches of the g code.

The tech or myself have never even heard of this, has anyone experienced anything like this ?

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