Jumped belt and belt not retracting

Ok today I was gonna try the Maslow on my first project. I selected the computer desk from the community garden, converted the .dxf file to .nc then took my machine down to load the plywood on top of the wasteboard. I then loaded the .nc file, or gcode and decided to have the machine take a run around the plywood because the file used a full sheet. Well I hit the arrow button to move the sled one time to many and it left the board. Thank God it didn’t break the belts again. So I wrestled the machine off the plywood and tried to retract the belts. The all came in except for one. So I decided to extend them again and retract to see if it would fix itself…no luck…the belt adjacent to the one that would not retract looks like it jumped the little protective guard in the belt"gearbox". I have posted a pic…so my question is: do I have to hit that reset button on the top to get it to retract all the way again? I remember having to do that when the belts broke.

1 Like

Unfortunately when that happens the belt usually has gotten chomped by the gears in there which does break it :confused:

On going saga…well after spending most of the day learning the software nuances of communicating with the maslow, I was able to get it to start cutting. I am not sure if it was the design I picked from the community garden, or something I am not doing right. First attempt the router plunged to all the way down. 1/2" and 3/4" plywood both penetrated at the same time. So I had to shut it down, retract extend and apply tension. Confirmed Z home and started again…looks like this design is set to cut 11mm so maxed out router rpms and tried again. I should mention the design I choose for my first project was the “Working Desk” from the community garden. I used a 1/4" 4T bit. Well the bit had a hard time penetrating the plywood this time. I had to push down on the sled to get it to sit flat. I am attaching photo’s, it is pretty disappointing…bits are brand new…any thought? I think if I could modify the .nc file to only go .4 mm per pass would probably do it…the learning curve on this this is not nice to an ol man…

1 Like




Oh, it spit out the bit too! I thought I had it torqued pretty good

1 Like

This is absolutely the way. It’s pretty tough to re-use someone else’s gcode. That’s the main reason that we’re moving away from the community garden and towards something more interactive so that you can change things like setting the number of passes and wood thickness.

You can load the nc code into any text editor and set the depth manually. Look for minus Z values, another thing to watch out for is G28 code, it sends the machine to a preset value which may be fully down.
See for an idea of what the codes do.
Supported Gcodes | Wiki.js

1 Like

Rick wrote:

I used a 1/4" 4T bit. Well the bit had a hard time penetrating the plywood
this time.

not all bits are designed to plunge straight down. look at the bottom of the bit
and see if it’s got a cutting surface on the bottom all the way to the center.
If not, you really need to ramp down rather than plunging straight down (usually
a feature of the CAM software, also look for spiral plunging). you can usually
get away with a shallow plunge and then moving horizontally.

David Lang