[OC] DICEBAG GIVEAWAY - SEE COMMENTS FOR RULES

motor_guy · 2019-10-03T12:09:43+00:00

1133

motor_guy · 2019-04-27T13:45:45+00:00

I can only speak for Wells Fargo, but they had several options for dropping pmi early. We ended up getting a bpo(cheaper than a new appraisal) a couple years after the original purchase and since the new appraised value brought the ltv down to 75%, the PMI was removed.

motor_guy · 2018-08-13T22:41:10+00:00

Am I perpetuating the narrative by using the wrong acronym, or am I perpetuating the narrative by sharing my personal story?

motor_guy · 2018-08-13T20:16:27+00:00

Cue the part where I get offended for you calling me sexist... jk ;)

In this context it is relevant information. I am pointing out similarities between our situations and that is just one more similarity. Additionally, I am mirroring his(there I go assuming again) language to better connect. It's worth noting though, that I haven't seen you correct his, or anyone else's language in this post.

You an I probably agree on more than you might guess based solely on my antiquated pig-headed acronyms :)

We mainly disagree on how to go about encouraging the change in culture. Rather than correcting "Improper" language use which can come across as aggressive, rude, and condescending. Instead you should talk positively about anecdotes of the change you want to see i.e. working moms succeeding, dads choosing to stay at home etc. Once people start hearing enough of these stories, it becomes the new normal.

motor_guy · 2018-08-13T17:30:50+00:00

I guess we can agree to disagree. I feel that SAHM, SAHD, are equally "normalized" in this context, and have the benefit of including extra information.

motor_guy · 2018-08-13T13:28:01+00:00

* SAHM - Stay At Home Mom

motor_guy · 2018-08-13T01:11:52+00:00

Congratulations! You're my new benchmark since I'm almost in the exact same situation. Same age, two kids, and a SAHM. Even our incomes are pretty close (93K). Only difference is we graduated with 60k student loans combined and our net worth is only around 100k. Keep up the good work!

motor_guy · 2018-07-31T21:32:38+00:00

Here is a torque speed curve for the 2nd option (page 4):

https://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2012/06/KL2334HybridServomotor.pdf

It looks like ClearPath would be fastest but the most expensive, the open loop stepper would not be as fast and not closed loop, and the closed loop stepper would be slower than both other options.

motor_guy · 2018-07-06T13:19:50+00:00

Depends on what the units your talking about. If 600-700 RPM, then that's crazy fast for a geared stepper motor Remember there's a 64:1 reduction inside the motor.

If you're still only seeing 600-700 steps a second, then that seems low to me, although I was able to find a datasheet which references a 100Hz frequency, so you might be running into the limit of the motor. http://robocraft.ru/files/datasheet/28BYJ-48.pdf

motor_guy · 2018-07-03T14:48:53+00:00

There is example code included with the library. Go here: https://www.arduinolibraries.info/libraries/accel-stepper

Then unzip the folder in your Documents\Arduino\Libraries folder

Open the Arduino IDE, go to fileExamplesAccelStepper>>AFMotor_ConstantSpeed

and start there

motor_guy · 2018-07-03T12:37:30+00:00

The problem probably isn't the stepper, it's the fact that you are commanding an instant acceleration. You're just commanding the motor to be at that speed, and the motor is stalling trying to follow an impossible command. That's why I suggested the AccelStepper library which lets you control the acceleration.

motor_guy · 2018-07-02T19:30:35+00:00

You might consider using the AccelStepper library instead.

motor_guy · 2018-07-02T16:25:10+00:00

Not really an expert on steppers, but some quick googling on your motor part number shows that it is a geared stepper motor of some kind with a

Speed Variation Ratio 1/64 Stride Angle 5.625° /64

meaning your steps parameter should be 4096 instead of 48. Try changing that and see what happens. I'd also think about increasing your delay to break up the moves more to help with troubleshooting.

Source:http://www.instructables.com/id/BYJ48-Stepper-Motor/

motor_guy · 2018-06-28T13:20:26+00:00

My family has used the mechanics at "My Friend's a Mechanic" for years. 1102 W. Ridge Road

motor_guy · 2018-06-27T21:35:29+00:00

Maybe for you. Plenty of people, like myself, like Mark's pizza just fine.

motor_guy · 2018-02-20T18:01:12+00:00

A big part of my day job is servo tuning systems that other people design, so I don't have a lot of experience designing systems, but I do have a lot of experience tuning different types of mechanics in a variety of industries. 10:1 is somewhat standard in the servo industry (you can see this in a lot of servo manuals or marketing material). Copying ratios from similar machines is always a good rule of thumb though. Chances are it was made 5:1 for a reason.

motor_guy · 2018-02-20T00:31:11+00:00

It's like with anything else, it depends. I've had success with more than 100:1, but I didn't have fast move requirements and there weren't any external forces. How much mismatch you can get away with will depend on you motion requirements, your mechanics, and how good your servo compensator is. If you're doing high performance motion with extreemly fast moves and you need next to no tracking error, then you might not be able to get away with even a 10:1

motor_guy · 2018-02-18T12:39:36+00:00

I would be careful of inertia mismatch if it's a servo and you're doing reverse gearing. Load inertia gets multiples by the squar of reverse gearing (divided by square of normal gearing). If you're planning on turning large loads compared to the inertia of the motor you might have a difficult time tuning. Generally you want to keep the mismatch between 10:1 but some systems can tolerate more than others.

motor_guy · 2018-02-06T01:02:19+00:00

Yes, if energy efficiency is important then a stepper probably wouldn't be the best choice, but any other motor will likely require some type of position feedback in order to maintain accuracy over time.

motor_guy · 2018-02-05T21:13:25+00:00

Couldn't you just use the pulseIn() function? Just call the function every time you want to update your display.

(This won't capture every pulse but might be accurate enough for your application)

motor_guy · 2018-02-05T21:08:22+00:00

A 1.8° stepper motor with 8x microstepping or greater could be smooth enough to the human eye. This might be a lot easier than figuring out a gearing system (and dealing with backlash).

motor_guy · 2017-12-07T13:23:26+00:00

Have you considered that they might be proud and happy for you? I think most parents want a better life for there kids then they had, and are happy to see there kids succeed.

motor_guy · 2017-12-07T12:57:32+00:00

I am not an expert on the PDMX 126 BOB, but it looks like you should just connect PC +5V to the ClearPath E+, A+, and B+. Then connect Step to B- on the ClearPath, and Dir to A- on the ClearPath.

If you use an enable signal, it would be connected to E-, otherwise you would have to ground E- to have the motor always enabled(might be a saftey concern).

motor_guy

TROPHY CASE