Is "Desktop SMT Pro" good for mid-size production?

[SANJAY SINGH]

Hi all,

I plan to buy a "Desktop SMT Pro" for my mid-size production of around 100 medium-sized PCBs with 100 components.

https://www.youtube.com/watch?v=8sKMdP88KUw

If any user of the m/c here, do share about its performance as there is no info on its performance anywhere on www.

Regards,

Sanjay

[Jörg Pressel]

I’ve already answered Sanjay in PM, but perhaps that’s interesting for others, too:

Here are my experiences: after changing the Juki style nozzles to Samsung style ceramic ones, I’ve had no longer problems regarding magnetic nozzles. The manufacturer sent me two new suction units, some nozzles and a new nozzle holder. Changing nozzles works very well.

The second important upgrade was a better down facing camera. Now it’s full HD and working much better than before.

I’ve populated just very few PCBs with the machine, but down to 0402 it works OK. 0603 should be even less problematic. Take your time calibrating the SMT Pro before doing any serious work.

I don’t know if the Desktop SMT Pro will work in a reliable way for 8 hours. It’s important to re-fetch the fiducial position in between or home the machine from time to time to have the best precision over time. Lubrication of the rails will be important, too. Perhaps ask the seller, if he could provide even better linear rails.

The feeders are working better than expected, though I have 2 failing with no solution, yet.

Other than that, 2000$ for a SMT including 10 feeders or so (don’t have the exact number right now) is a bargain. On the other hand: 8 hours a day is hefty ;-)

Cheers, Jörg

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[huynht...@gmail.com]

If you need a machine with Yamaha Feeder, you can learn about our project, www.afarco.vn

Vào lúc 05:28:08 UTC+7 ngày Thứ Bảy, 11 tháng 5, 2024, achieve...@gmail.com đã viết:

[Thorsten.R]

Hi,

I have a similar machine from China Mann with these feeders
Everything is made cheaply but it doesn't cost much.
The linear guides scratch... 

Here you can see how everything shakes.
https://www.youtube.com/watch?v=JIjy9bWSV7k

The feeders are poorly made, everything has very sharp edges and nothing has been done to prevent the components from jumping. The tape actually sits too high in the feeder, so the plastic nose has to be pushed in additionally. Works worse with plastic tape.

But everything is going reasonably well.

For one (3) feeders <40€, ask what you want.

Check them out on www.afarco.vn, they're well made, but they also cost more.

[Thorsten.R]

and 8 hours of operation at this speed, the mini StepStick drivers have step losses because they are thermally overloaded.
It seems to be becoming fashionable with these mini stepper drivers.

[Mr covert]

I've got a desktop-smt.  I ran 6000 parts through it yesterday without too many missed parts. We have colder weather here now but the vacuum solenoids overheat on hotter days (25c+) after running for 40 minutes.  The seller has been unable to help me with this issue.  I have no issues with overheating steppers as above. The up facing camera is a janky 2 sensor 1 controller chip, it switches sensors by changing resolution using a patched OpenPNP. In April the seller finally released a patched openpnp version that correctly uses the "2nd" camera for calibration of N2,  it's still a bit of a hack. It's certainly a negative to the machine. The up camera is good for small parts but larger parts that use vision compositing to align is not good on my machine and I have to manually reposition SOP-18 chips. 

The machine has its issues but gets the job done with a bit of fluffing around.

While writing this I've decided to start a desktop-smt-owners google group. Feel free to  join. I'll be posting a few of the issues and solutions I found soon.

https://groups.google.com/g/desktop-smt-owners

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[Thorsten.R]

Hi,
these are just my experiences with these mini TMX22xx drivers.
For the X,Z axis and the Nema11 they are perfectly OK but on the Y axis with a Nema17 and only 24V it is nothing and the speed shown in the video.

In addition to my larger P&P, I also have such a wobbly machine with this structure and feeders, but more for tinkering. feed/accelation > 700/5000, the Y-axis has already blocked at fast diagonal travel. With a larger driver and 36V (due to BMF) this no longer happens.

The feeders are good for the price. If they would guide the tape better at the front, they would run 1A.

Possibly control the vacuum solenoids via PWM so that they no longer get so hot?

[Mr covert]

My Desktop-smt uses nema 23s on X and Y with Y using an external encoded stepper driver and X uses  a built in encoded driver on the end of the motor.

Pictures of my Y driver and motor attached 

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/80635a05-24dc-46f0-b36b-fe8b54256fb0n%40googlegroups.com.

[Thorsten.R]

Hi,
That's a decent job.👍🏻

[Wayne Black]

@Mr covert; I have similar drivers/motors. Did you 'tune' them with any software/app? 

To view this discussion on the web visit https://groups.google.com/d/msgid/openpnp/3e9627cf-7203-4f91-8093-0d3d87211415n%40googlegroups.com.

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Wayne Black

Owner

Black Box Embedded, LLC

black...@blackboxembedded.com

1.831.682.4964