Why isn't any of this information available?

Thanks for the work you put in but if “Maslow is a community driven open source project”,

why isn’t any of this information available?

  1. Formulas/calculations, nomenclature used in the design.

  2. measurements the diameter and thickness of the gears in the gearbox.

  3. gear ratios in the gearbox.

  4. motor specs: voltage, current, RPM, Torque, dimensions

  5. output speed of gearbox.

Community members had to go inside the gearbox themselves to get some information.

They shouldn’t have had to do that.

I asked question years ago and received no response.

Where is the community?

How is this open source, are there only certain parts that’s open source?

Thanks

the info you are asking for was unknown to everyone until the community dug into
it, or it was readily shared by Bar (such as the motor info where he shared
links to the motor and everyone could look them up)

I don’t know what you are accusing him of, but he has been very open with all
information that he has.

David Lang

Those are all pretty broad topics, but I’m happy to answer any specific questions.

1 Like

I suspect that you think that there was more knowledge to be had than there actually was.

the math of the maslow movement was much more primitive in the initial version, the community contributed significant advances.

the initial software assumed that the gear ratio advertised by the motor manuracturer was correct, the community discovered it wasn’t.

the lean-back and weight were a matter of experimentation, not calculation.

To: DLang

I asked a question.
it’s basic information and should be in one area (not more than one page from “www.maslowcnc.com”) and not have to write an AI data mining program to find it.
I am not accusing anyone of anything.
Remove the stick and inhale.

Thank You

To:Bar

Hello, thank you for responding.

I’m sorry but I think your response is evasive “Those are all pretty broad topics”.
They are not broad. I am asking for exactly what I would like to know.They are very specific:

  1. What are the formulas used with nomenclature?
    Type up and post.

  2. What are the dimensions (diameter/height) of the gears in the gearbox? Measure and post.

  3. What is the gear ratio of each stage of the 4 stages of the gears in the gearbox? count the teeth of each gear and post.

  4. Motor specs are motor specs. voltage, current, RPM, Torque, dimensions.
    Get specs from manufacture and post or get the common model number
    so community can look it up themselves.

  5. What is the output speed of gearbox?
    Measure RPM and post.

I don’t know how else to ask. Not looking for philosophy just the numbers and there are numbers that go to each question.

Thank you for your time.

the maslow is open source enough that there have been multiple people who have
sold kits, are you saying that there is information missing? or that the
existing information needs to be organized differently?

If you aren’t accusing people of acting in bad faith, please explain what you
are asking for.

David Lang

  1. What are the formulas used with nomenclature?
    Type up and post.

formulas for what? the formulas that are in the firmware for calculating the
position? that is different for different firmware

  1. What are the dimensions (diameter/height) of the gears in the gearbox? Measure and post.

diameters don’t matter, overall gear ratio does

  1. What is the gear ratio of each stage of the 4 stages of the gears in the gearbox? count the teeth of each gear and post.

why? only the overall ratio matters right?

  1. Motor specs are motor specs. voltage, current, RPM, Torque, dimensions.
    Get specs from manufacture and post or get the common model number
    so community can look it up themselves.

umm, did you look at the BOM that lists this?

  1. What is the output speed of gearbox?
    Measure RPM and post.

the stock motors will do ~20 rpm at max power

David Lang

for the motor, I believe that this is a 24v version of the motor (specs pretty
much the same, but with higher torque and speed than the 12v version)

note that different kit manufacturers may include different motors.

David Lang

Edit (previous post contents not helpful):

Formulae: Firmware/Kinematics.cpp at master · MaslowCNC/Firmware · GitHub

a simple search on the forum will get you what you seek:

gearbox info see post 7 for gear ratios. More here. you can change them if you want. the encoder is on the motor shaft, not on the gearbox shaft, so it’s counts wont change if you change the gearing. The sprocket is a 9 tooth 1/4" link.

curious: why shouldn’t community members have had to go into the gearbox to get information? The gearbox came with the motor as an assembly item. It was not designed for this application, it is an off-the-shelf item available in mass quantity (or at least it used to be). The manufacturer should have the info you seek. It isn’t like it is proprietary information. It makes sense now that you bring it up, that this might be useful to archive. But “c’mon man,” your claim of lack of open source isn’t really valid because the “community” didn’t cough up facts fast enough for you when you could have looked them up with a little google-fu.

1 Like

formulas for what? the formulas that are in the firmware for calculating the
position? that is different for different firmware.

Angles, sprocket size, chain length, chain tension, sled angles, sled weight, frame bar thickness… any formula/all formulas.
what you used to come up with what you have. Why does it have to be one or two?

  1. What are the dimensions (diameter/height) of the gears in the gearbox? Measure and post.

diameters don’t matter, overall gear ratio does.

It matters if your scaling, customizing or replacing the plastic inside with metal.

  1. What is the gear ratio of each stage of the 4 stages of the gears in the gearbox? count the teeth of each gear and post.

why? only the overall ratio matters right?

It matters if your scaling, customizing or replacing the plastic inside with metal.

  1. Motor specs are motor specs. voltage, current, RPM, Torque, dimensions.
    Get specs from manufacture and post or get the common model number
    so community can look it up themselves.

umm, did you look at the BOM that lists this?

B.O.M. list specs of the gearbox only not the motor other than its voltage not even its model#.

  1. What is the output speed of gearbox?
    Measure RPM and post.

the stock motors will do ~20 rpm at max power
[/quote]

Thank you, one straight answer and yes, I did find this one in the B.O.M. this time, it wasn’t always there.

I not looking to argue or debate if it is required, I don’t care if everyone on the planet thinks it doesn’t matter. I do, and I know others do because have asked me if I found anything.

I would like that data available without the questions and the wasted five message exchanges like here.

Here is how it should go.

Example:

Question: What are the motor specs, please?
Reply: It is a Modle-775, 24V, 1A, 6000RPM dual ball bearing, 42mm dia X 66mm len.,.Shaft-5mm dia X 17mm len.

Courtesy reply:Thank you.

End example

See quick no fuss no muss. You got to help, member got their answer.
All are happy.

Thank You

formulas for what? the formulas that are in the firmware for calculating the
position? that is different for different firmware.

Angles, sprocket size, chain length, chain tension, sled angles, sled weight, frame bar thickness… any formula/all formulas.
what you used to come up with what you have. Why does it have to be one or two?

most of that is ‘it works’, there wasn’t that much analysis done :slight_smile:

the sprocket sizes are the smallest available that fit the motors

chain length is ‘long enough to reach’, the 10’ top beam was that lumber comes
in that size and it seems reasonable and seemed to work.

Later investigation shows that there is a significant advantage in going to a
12’ top beam, most of the math showing this is available in the spreadsheet I
created. This shows chain tension, and experimentation has shown that more min
tension is better, and max tension can’t be too high or you have trouble in the
top center (again, with the original motors/power supply)

the math isn’t perfect, but it seems to be ‘good enough’

frame bar thickness is ‘2x4 is the default dimension for US lumber’ and the
prototype worked. It may be better to have a stronger top beam, but no real
analysis has been done.

frame angle, accidental testing that was done during the design of the new frame
(i.e. Bar not following my instructions in building a test frame :slight_smile: ) showed us
that 20 degree tilt back is too much. We had someone test with 5 degree tilt
back and they found that the sled tended to push away from the workpiece instead
of drilling in. We haven’t had anyone test 10 vs 15 degrees (let alone anything
more specific) to see where the real sweet spot is.

As for the sled weight, before the first prototype, Bar did testing with lots of
things, including 6+ bricks on the sled, very heavy chains, etc and the result
ended up being the two brick weight ‘worked’.

Since then, we found all sorts of new info. We know that a sled that’s much
heavier runs into problems (the motors can’t move it near the top center), but
we really haven’t tested much with varying the weight. The early versions of the
code did nothing to account for the chain sagging (which will be more
significant with a lighter sled), and I don’t know of any testing that has been
done since holey calibration was invented which partially accounts for chain
sag.

mostly, this isn’t a matter of formula and calculations as much as ‘the
prototype worked and we’ve mostly followed along with that since’

  1. What are the dimensions (diameter/height) of the gears in the gearbox? Measure and post.

diameters don¢t matter, overall gear ratio does.

It matters if your scaling, customizing or replacing the plastic inside with metal.

if you are doing that, you should just build a complete new gearbox or purchase
the gears because there’s a lot more detail than just hight/diameter of the
gears.

  1. What is the gear ratio of each stage of the 4 stages of the gears in the gearbox? count the teeth of each gear and post.

why? only the overall ratio matters right?

It matters if your scaling, customizing or replacing the plastic inside with metal.

same answer

  1. Motor specs are motor specs. voltage, current, RPM, Torque, dimensions.
    Get specs from manufacture and post or get the common model number
    so community can look it up themselves.

umm, did you look at the BOM that lists this?

B.O.M. list specs of the gearbox only not the motor other than its voltage not even its model#.

ok, I posted a link to a motor in the same family, that should answer your
questions.

  1. What is the output speed of gearbox?
    Measure RPM and post.

the stock motors will do ~20 rpm at max power
[/quote]

Thank you, one straight answer and yes, I did find this one in the B.O.M. this time, it wasn’t always there.

I not looking to argue or debate if it is required, I don’t care if everyone on the planet thinks it doesn’t matter. I do, and I know others do because have asked me if I found anything.

I would like that data available without the questions and the wasted five message exchanges like here.

Here is how it should go.

Example:

Question: What are the motor specs, please?
Reply: It is a Modle-775, 24V, 1A, 6000RPM dual ball bearing, 42mm dia X 66mm len.,.Shaft-5mm dia X 17mm len.

Courtesy reply:Thank you.

End example

See quick no fuss no muss. You got to help, member got their answer.
All are happy.

you are asking for information that nobody knows, and you are asking people to
go take apart their equipment to measure stuff, that doesn’t justify an
automatic ‘here are the details you are asking for’ response you seem to be
expecting.

David Lang

1 Like

Somehow I got an email notification on this thread…not sure why… and so I’m just going to crawl back under my rock again cause I don’t know anything…I’m sorry but I’m ignorant. I didn’t do it.

1 Like

[/quote] you are asking for information that nobody knows, and you are asking people to go take apart their equipment to measure stuff, that doesn’t justify an automatic ‘here are the details you are asking for’ response you seem to be expecting.

David Lang
[/quote]

That is exactly the point.
Maslow is 7 years old. Someone should know.

People have taken apart their equipment measure stuff.
https://forums.maslowcnc.com/t/whats-inside-the-gearbox-motor/190

You are very smart people. This stuff should be a for thought not an after thought. Initial information should be documented with detailed specs of each item (for WHEN the item is no longer available). So a close match can be found when needed or used as a base to find higher performance options.

There are a lot of electronic projects that are dead because one component and its datasheet is no longer available.

To me, the information I requested and everything else I don’t know to ask for yet, should be on a PDF or spreadsheet created 7 years ago and updated as often as possible. That should be the foundation your knowledge is based on.

Thank You for what you could answer.

Where did you post the information on the motor, Github?

Thank You

here it is again

this is a 24v version, so it’s 28 rpm instead of 20 and has more torque, but
it’s the same size.

people were actually building their own Maslow before the first kits shipped
sourcing everything themselves.

nothing in the motor is critical, it just is a selection that works with the
stock controller board (limited by the current capacity of the controller and
power supply), people have build maslow systems with many other motors.

David Lang

Thank you, thought the first one was an AD.

But, it’s still the gearbox assembly/unit, not just the motor.
There are motors that are the some diameter but longer that may have a higher RPM or Torque but if you don’t know where to start from…

I know you don’t know, I’m not asking again, I’m just stating I was always asking about the gearbox and motor separately/independently of each other.

Thank You

Topics in forum that support my statements. one
They are asking the same thing I am.
I started not of these and have no posting in any of them but (Whats inside the gearbox/motor).

Whats inside the gearbox/motor?

Explanation of the math for moving the sled?

Frame Geometry Question

Upgrading XY motors to double bearings and all metal gears

Willing to open broken motor? Help needed

X/Y motor specs vague

Finding Center of Gravity for the Sled Ring

New Stock Frame Design

Gearbox Failure - Are We Exceeding Motor Design Limits?

Alternate Supply of Motors/Gears/Encoders

Motor gears stripped

Another left motor gear failure, need a solution

Triangular Linkage Evaluation Criteria and Measurements

Fun with Numbers - Calculating Motor Load Force

Calibration pattern for triangular kinematics

What is distance of motor mount to worksurface?

Motor distance question

What is correct chain pitch?

25 more I got tired.

in the case of the maslow, Bar found a unit he could get from china that worked,
min order 1000. this unit seems to be the equivalent and the worm gear on the
motor shaft appears to be pressed on. We have no info on the motor separately,
it’s all one unit for us. (motor, encoder, and gearbox)

David Lang

@bar , I am assuiming you have access to this information but can you give us the current total of:

  1. Number of individual posts to the forum.
  2. Number of individual comments made to all posts in the forum.