Maslow #29 BuildLog

Are you using the 3D printed belt guide?

I didn’t know there was a 3D printed guide, next print to queue up lol! It happened after a cut. There is a small bit of that belt that is damaged due to pinching. I think that damage was enough to cause it to move further up when wrapping.

Upgraded to 0.72 release and ran calibration. Fitness did go down Fitness: 0.5031956445800344 prior was 0.5202566613402789 Here is the log.
Maslow0.72.txt (19.2 KB)

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Was there anything funky going on like too much slack in that belt? Under tension I wouldn’t expect them to migrate like that

I think I still have too much length to it. Coiled it extends out past the gears.

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The 3D printed belt guard latest version is V8 and its listed in the 3D parts thread. ps I had to enlarge the scale in all three axis and print at 102% to ensure the guard didnt introduce any friction to any moving parts but my printer may be out of calibration etc.

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I’m still seeing a little too much slack on my belts too which I wasn’t before switching over the calibration process to the new system. I’m digging into it right now.

Specifically I’m seeing it on the top left and bottom right belts which is making me think it’s z-axis height related since those are the highest ones

Going back to the config values that gave me the 0.52 fitness score here is a 750mm diagonal move bottom left. The top right belt is really slack.

For the lack of a better word F*** I’m done for the day. I’m not spending another hour pulling this thing apart and putting it back together till I get some belt guards printed.

This happened after jogging around and then setting to comply, retracting, extending, and clicking apply tension.

Serial Messages
[MSG:INFO: Channel auto report interval set to 50 ms]
[GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
[GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
[MSG:INFO: Channel auto report interval set to 50 ms]
[GC:G0 G54 G17 G21 G90 G94 M5 M9 T0 F0 S0]
[MSG:INFO: Set to comply]
[MSG:INFO: Retracting all belts]
[MSG:INFO: Top Right pulled tight with offset -2163.235]
[MSG:INFO: Bottom Left pulled tight with offset -2139.540]
[MSG:INFO: Top Left pulled tight with offset -2125.240]
[MSG:INFO: Bottom Right pulled tight with offset -2164.781]
[MSG:INFO: Extending all belts]
[MSG:INFO: All belts extended to center position]
[MSG:INFO: Measured waypoint 0]
[MSG:INFO: Center point deviation: TL: 0.053 TR: -0.022 BL: -6.218 BR: -9.529]
[MSG:INFO: Center point deviation: TL: 0.053 TR: -0.022 BL: -6.218 BR: -9.529]
[MSG:INFO: Center point deviation within 15.000mm, your coordinate system is accurate]
[MSG:INFO: Channel auto report interval set to 50 ms]
[MSG:INFO: Set to comply]
[MSG:INFO: Retracting all belts]
[MSG:INFO: Bottom Left pulled tight with offset -1.342]
[MSG:INFO: Top Left pulled tight with offset 0.043]
[MSG:INFO: Bottom Right pulled tight with offset 0.021]
[MSG:INFO: Top Right pulled tight with offset 0.032]
[MSG:INFO: Retracting all belts]
[MSG:INFO: Top Right pulled tight with offset -0.032]
[MSG:INFO: Top Left pulled tight with offset -0.032]
[MSG:INFO: Bottom Left pulled tight with offset -0.183]
[MSG:INFO: Bottom Right pulled tight with offset -0.021]
[MSG:INFO: Extending all belts]
[MSG:INFO: All belts extended to center position]
[MSG:ERR: Motor current on Bottom Left axis exceeded threshold of 4000]
[MSG:ERR: Motor current on Bottom Left axis exceeded threshold of 4000]

Edit: It’s always the south east arm from top view or second arm from the top.

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Hey were do you change the allowable deviation on the belts. I am struggling with tl and br not being in range. I notice your deviation allowable is 15mm
Thanks

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No clue, I think that is a firmware setting.


44:58 later… Back in operating status. I had to do a full belt replacement on this one as there wasn’t enough length left to just cut the busted section. I have one spare belt left.

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Okay back in action. I don’t know if anyone will find this useful, but I generated 4 files to move Maslow to where the four corners of a USA standard plywood sheet would end up relative to the center working area. I then jogged the machine Z up 50mm and used some chalk to mark the location. Moving the Z back down and sending the next file… so on and so forth. Then, marked it with permanent marker afterwards. The dots matched up so that’s good.

Bottom Right.nc (414 Bytes)
Top Right.nc (410 Bytes)
Top Left.nc (410 Bytes)
Bottom Left.nc (414 Bytes)

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I downloaded @fireslayer26 V8 model and queued up the print in ABS with PETG for an interface layer. Thank you for this!

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Even with the belt guards, I find it’s best to guide the belts along the reels when they are full with extension and retraction operations. Otherwise they can still slip and overlap themselves.

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Think I found a bug @bar. The motor current error happened during a file run. However the machine just kept on trudging ending up where it shouldn’t have been. Oddly enough this was the last pass and it was halfway finished.

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Interesting. Was your bottom right belt really tight? This is the same symptom I have had in my failed cuts, but your log has a clue mine didn’t…

@bar looking at “Reset during file job at line:”… Given that this comes as a result of the allChannels.stopJob() I added, I suspect that the Maslow.cpp stopMotors() is actually not stopping motors, as this is called before we call stopJob. I don’t know enough about Motor.cpp yet to guess why, but that is my thought.

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It seemed fairly normal compared to how it had been running all day. I did receive a bottom right 4,000 threshold on pull tight after expand one time today.

I did put 4 of the belt guards in, and at one point it saved my belts for sure. That situation arose when I expanded the belts, but hadn’t taken slack to adjust the Z offset from a hard power pull.

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I have a Maslow 4 on the way.
Frank love your cabinet!
Couple quick ?

Where can I find the ideal dog joint creation specs?
Frank brought up a comment he should have done it differently.

Has the firmware been updated to address this?

If so I assume it may be a good idea to get the appropriate belt guards anyway. Is there a place I can purchase the latest/best already printed (in US) my 3D printer is down.

Thx!
Geo

It’s trial and error. Every machine will have its own deviation in tolerances.

Here is a good read: Introduction | Design into 3D

I believe the model author for the belt guards has them posted on Etsy. I would ask for you to support them directly otherwise I can print a set of he/she is no longer selling.

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Oh ok great. I’ll look for theirs on Etsy.

I’m pretty familiar with 3D design (Fusion360, Shapr3D etc.).
But not with CNC so I’ll check it out.

Thx!
Geo

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