Depth of cut for the calibration cuts?

I’ve run into another quirk of my build. I’m resting my back board, and test cut board on a lip that is designed to take a thicker foam back board in future and therefore the lip will be hidden. However, in my current test material configuration the lip protrudes about 3/4mm so that the bottom cuts of the 5-cut calibration test are not actually being made in the workpiece. This being caused by the sled riding the lip.

I’m wondering if it is possible to configure this cut depth to be a couple of mm deeper and I should be able to make a mark, enough to measure the test pattern.

I’ve another possible method, change the mm per pitch of the z-axis, but it’s late in the day and that started to make my head hurt!

Any thoughts much appreciated.

Kind regards,


That would work, but it’s a little hackey.

Would it be OK to move the cuts up on the sheet a little bit so that the sled won’t hit the lip? If so you could just enter a slightly smaller than accurate number for the motor vertical offset which would move everything up. The difference will be corrected when you enter the measurements for the test cuts


SOLVED! used z-axis pitch shift!


OK, so, not entirely solved. I used the z-axis pitchshift and it did the trick, but the lip is obviously a tad bigger on the right hand bottom corner and as such that cut didn’t register.
Through doing this I have to say there is good consistency with ‘return to center’!
So, I went for your idea @Bar and that did the trick nicely, thank you. I now have my three calibration measurements!
However, as I reduced the Motors to Workpiece height by -53mm, should I now put in the true measurement to top of board for cut 5, allow it to calibrate from these measurements, and then once that is complete go back and change my ‘Motors to Workpiece’ measurement (+53mm)?

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If you put in the true measurement for the cut to the top of the board it will realize that it was off by 53 mm and correct for it so you shouldn’t need to do anything else!

It will show you the final calibrated measurements in the next step, it’s worth checking to see that all went well because you are the first to try this :grin:

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Okay,so here is a breakdown of what I have.

My actual measurements:
Distance between motor: 3160mm
Vertical motor offset: 543mm
Kin typ: Tri
Chain Bottom
Rotation Radius between 136.5 and 140mm depending on to which part of the chain I measure.

Test Cut Measurements: 1–>2 1944mm
3–>4 1938.5mm
5 235mm

Calibration output:
Distance between motor: 3160mm
Vertical motor offset: 514.4mm
Kin typ: Tri
Chain Bottom
Rotation Radius 148.7
Sag: 17.244258

Once you click to the next it presents a screen saying congrats you’ve calibrated. There is a ‘Finish’ button but this doesn’t seem to work, so I used the quit.

The Vertical offset looks well out of whack, but on measurement it’s actual bang on I think, so I must’ve got something wrong somewhere before!

I’m guessing I’m ready to start making furniture! ;¬)

Ah, okay because the Finish button had no effect I ended up hitting the Quit button and the Dialog came up telling me that finishing the calibration process early may not result in proper…
The motor offset height in Maslow Settings hasn’t been changed, so I’m guessing it’s not updated as per calib process output.
Any thoughts, it could be me as it’s been a long day!

You should be OK to ignore that message if you got all the way to the finish step.

Was this version 1.11? I thought I fixed the issue with the finish button not working :thinking:

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Ah, I’m not up to date, still on v1.10!

Will update and run again in the morning with extra coffee ;¬)


Okay, life got in the way there for a bit, but I’ve just updated and fired her up to conduct the calib test cuts again, and skipping through it appeared that my .ini file had been updated as per previous attempt, despite me being on version 1.10 and the button not appearing to work. So, regardless I was in the mood and ran the test cuts again. Interestingly they were a little offset from the previous cuts, but this made it easier to measure. This time around, I got a perfect match with my 1–>2 and 3–>4 measurements, so I’m guessing that is a good indication that the first test cut run was a success. I also noticed that my chain sag correction figure had changed by about 4 whole digits.

I think I’m all up and running now.

So many ideas swimming around in my head I’m not sure where to go next; a bee hive, or a bit of signwriting; window screens, or bookcase?

Thanks again to all who have directly helped me with problems on this build, and no doubt will be bailing me out of issues in the future, and to everyone else for all the effort and ingenuity that has gone into the design, programming and whatever else it is you’re all getting up to behind the scenes.

Time to go and design great things ;¬)