Pick and Place Machine TVM802A / TVM802B

[hugeone]

I did not have much success with TFQP. The machine will routinely place it at an angle. They are very easy to bridge and hard to clean up the bridges.

That is actually the main reason of buying it.

[hugeone]

Hi. Are you generally happy with the machine  or buying you would consider as a mistake?

[ar__systems]

I would not call it a mistake... I learned a lot from it. But I stopped using it after I bought TVM920.

[hugeone]

920 does not fit my budget . Bus as I understand I should look for the alternative.

[ar__systems]

I'm pretty sure all alternatives in 4K range will be about the same. If you look at them, they all use identical or similar hardware, even their feeders are the same. The s/w could be better or worse. Then again, your experience might be different. There is a guy here who's user name is a digikey's part number, and he seem's to be satisfied with his machine, which is a different but similar to 802.

[hugeone]

Thank you.

To buy, or not to buy, that is the question

[HHaase]

For my own use, I've been pretty happy with it.   Zero regrets,  and it will cover my needs nicely until I'm ready to move up to a larger machine.
Eventually I will outgrow it, and then I'll need a 4+ head machine with better/more feeders. 

Software isn't the most intuitive, and I do need to look into a better way at bringing in placement files from diptrace and kicad.   Any issues I've had there are mainly just my own lazy self not doing any work to figure out how.

There have been times I wished it had a bit more component range,  but having a 3D printer and making custom parts trays keeps things workable for me.
In my case it hasn't been the total number of feeders,  it's been the limited height in the 12mm and 16mm wide slots.  They just don't deal well with parts more than a couple mm in height.

However, once I put a taper into that the advance pin,  nearly all my problems went away.  Feeds much more reliably now.   Though I do still need to track down an issue with the opto sensor that detects the advance pin.   I think it overheats eventually and starts to always think the pin is retracted.

[hugeone]

However, once I put a taper into that the advance pin,  nearly all my problems went away.  Feeds much more reliably now.   Though I do still need to track down an issue with the opto sensor that detects the advance pin.   I think it overheats eventually and starts to always think the pin is retracted.

Thank you. Could you explain it better. Where and what is this advance pin?

[harry4516]

...I spend some time trying to ohm through the little board that sits on top of the nozzles and measures the vacuum. The attached schematic is what I found. It might be wrong, but at least this makes sense.
The vacuum itself is setup up as a wheatstone bridge....

thanks for sharing the schematic.

My external VAC pump is an oiled vac pump and does a very deep vacuum. It is connected to a pressure-equalizing canister. Then it is spread into two tubes and connected to the original tubes in the TVM820. The 820's vac pumps are unpowered now which makes the machine a lot quieter.

The pressure sensor works fine with the 504 nozzle and larger. But the 503 (which I use for 0603 parts) is detected as OK even if no part is on the nozzle. So I need to reduce the sensivity of the sensor and I will try it using your schematics.
modifying the amplification of the first amp (blue box) should do the job.

[HHaase]

Well, broke the advance pin on mine,  and just bent the spare.   Sent an e-mail to Qihe about ordering a replacement,  but figured I'd check with you guys to see if anybody else has had this issue and may have identified a stronger/better replacement from a different machine.

-Hans

[ar__systems]

I would not try to make the pin stronger. If fact I would make it weaker. If you broke it means you messed up something, or, more likely, the s/w messed up on its own If you run into the same situation again with a stronger pin, something else will break, and could be worse.

[ar__systems]

talk to qihe via skype, that's the fastest way to reach them

[stefanoxjx]

Hello guys,
I'm negotiating to purchase a second-hand TVM802A, but I don't understand what's the differences between TM802A and TVM802B.
Which are the formats that this machine can't manage?
I'm very newbe of smd world and I need to buy all necessary to can assembling the boards correctly, and then, I ask you which solder paste and reflow oven do you use to have good quality job.
Many thansk at all.
Regards.

Stefano

[hugeone]

1. The difference is in the number of feeders.
2. If you buy the machine check if it is 3.x version - this software is taking the mnt files directly so no converters are needed
3. Solder paste - Pb free if you want to sell it. ROHs compliant.
4. Conveyor type is the best.

I have the machine for couple of days and I am quite happy. Everything works as expected.

[TJ232]

1. The difference is in the number of feeders.
2. If you buy the machine check if it is 3.x version - this software is taking the mnt files directly so no converters are needed
3. Solder paste - Pb free if you want to sell it. ROHs compliant.
4. Conveyor type is the best.

I have the machine for couple of days and I am quite happy. Everything works as expected.

What version do you have, TVM802A or B?
Ordered this year? Did you received also a extra box with parts or just bare machine?

Thanks,
TJ.

[tempo63]

Does anybody have experience with the TVM802B-X? What are the main differences? I couldn't find much info on it. I understand it was released quite recently.

[ALEXRA]

eh.....  difference ver the website introduction pictures

 BX type has Built-in industrial computer and high voltage motor drive system inside

More stable than the old type？？


link

https://qihesmt.en.alibaba.com/product/60757615921-804211664/Products_TVM802A_X_desktop_smt_pick_and_place_machine_bga.html?spm=a2700.icbuShop.prewdfa4cf.40.5b047bbbRfgUV6

[qihe_kim]

Maybe what he said was the needle.It is next to the down camera.

[mgrossm1@yahoo.com]

My TVM802B is constantly generating "X-Axis Into Positive Limit" alarms. There does not appear to be any problem to cause these alarms. Is there a way to adjust the limit?

Also, my TVM802B was purchased in August 2015. Is it possible to upgrade the firmware?

[qihe_kim]

My TVM802B is constantly generating "X-Axis Into Positive Limit" alarms. There does not appear to be any problem to cause these alarms. Is there a way to adjust the limit?

Also, my TVM802B was purchased in August 2015. Is it possible to upgrade the firmware?

Maybe the sensor of X-Axis or the mainboard is broken.And it is difficult to upgrade the firmware.

[frog]

"Axis into positive limit" means that the microswitch has been closed by the head moving all the way to its limit (X or Y axis).  When you do a 'home' operation the machine does this for both axes and then presumably backs away a little, until the switches open again.  If the machine sees that the switch is closed you'll get this warning; I think you'll find that it tends only to happen when the head is in the home position; if so then there's nothing to worry about.  If it happens when the head in any other position then there's a problem (stuck microswitch).

[harry4516]

I can confirm this. It happens when the head is already in the home position at power up and can be ignored.

[crunch_tone]

After one year of using this machine, one of the pumps stopped working. Sticker on the pump tells me that it's Parker / Hargraves PN: D861 - 22 - 01. I tried to find it on the official web site using this PN, but nothing was matched with this request. Has anybody meet the same problem? Have you tried to find any replacements? Need to say, that I don't want to use external pump at this moment.

[ALEXRA]

Hye guys the TVM802 VIDEO looks impressive

LINK

[qihe_kim]

After one year of using this machine, one of the pumps stopped working. Sticker on the pump tells me that it's Parker / Hargraves PN: D861 - 22 - 01. I tried to find it on the official web site using this PN, but nothing was matched with this request. Has anybody meet the same problem? Have you tried to find any replacements? Need to say, that I don't want to use external pump at this moment.

You can connect our aftersale to buy the pump.
E-mail:after_sale1@qihekj.com