Hot Air Station - Air Pump Failing

[stj]

Re: Hot Air Station - Air Pump Failing

the cloud look is caused by the flux boiling off when it was soldered, look below it - some pins have hairline rings

on the bright side, lead-free solder is much stronger so cracked joints are less common.

[caphair]

Re: Hot Air Station - Air Pump Failing

Oddly the air control seems weaker. I have full range again but just seems weaker than before even at max air. Is it possible for a new pot to cause this or?

[stj]

Re: Hot Air Station - Air Pump Failing

check it with a meter

[caphair]

Re: Hot Air Station - Air Pump Failing

check it with a meter

Check the potentiometer? It has a smooth range.

Could I adjust the trim pot to increase air?

[redwire]

Re: Hot Air Station - Air Pump Failing

You could measure rms ACV at the air pump and see if it's going up to full mains voltage or not. Or use the 40W light bulb.

The trimpot only sets the lowest pump speed, it would not affect full speed.

If the pot goes to near zero ohms, and the triac is still not full on, I would change the cap from 0.1uF to 0.047uF (47nF) for 120VAC operation.
The air pump speed control design is el-cheapo and missing a RC snubber, so I'm not sure how much voltage stress the triac sees, or how much current the main potentiometer sees.

I drew this schematic of the YH 852D+ V2 pump controller, based on your pictures but I cannot see all the parts. It's a typical light dimmer circuit. Part values are all over the place depending on make (Kada, Yihua, Saike etc).

[caphair]

Re: Hot Air Station - Air Pump Failing

You could measure rms ACV at the air pump and see if it's going up to full mains voltage or not. Or use the 40W light bulb.

The trimpot only sets the lowest pump speed, it would not affect full speed.

If the pot goes to near zero ohms, and the triac is still not full on, I would change the cap from 0.1uF to 0.047uF (47nF) for 120VAC operation.
The air pump speed control design is el-cheapo and missing a RC snubber, so I'm not sure how much voltage stress the triac sees, or how much current the main potentiometer sees.

I drew this schematic of the YH 852D+ V2 pump controller, based on your pictures but I cannot see all the parts. It's a typical light dimmer circuit. Part values are all over the place depending on make (Kada, Yihua, Saike etc).

Seems to smoothly change voltage from 45vac (lowest air) up to 118vac highest setting. I tweaked the trim pot to get lowest air speed to 50vac as it seemed a little too non-existent at that setting.

I thought maybe this hose was to blame so I squeezed it open but there was no change over all. Maybe it's the pump not putting out same air as when it was new?

[stj]

Re: Hot Air Station - Air Pump Failing

maybe there is a blockage - like where the wire joins the air and leaves the unit - that area used to kink a lot on mine.

[caphair]

Re: Hot Air Station - Air Pump Failing

maybe there is a blockage - like where the wire joins the air and leaves the unit - that area used to kink a lot on mine.

You mean at the connector held in by 2 screws going out to the hot air wand?

[stj]

Re: Hot Air Station - Air Pump Failing

yes, where the pipe meets the base

[caphair]

Re: Hot Air Station - Air Pump Failing

Do you mean there could be blockage inside the little box that the air and wires join together or that the hose would kink at that point?

Here's a pic with the hose removed. I just see wires inside that I'm guessing is normal.

How would I remove the hose at the front to check for blockage? Does it just twist off? I tried but it wouldn't budge

[caphair]

Re: Hot Air Station - Air Pump Failing

I even tilted the reservoir? white tank to relief the kink of the hose coming off it but there was no noticeable difference

[sam_sam_sam]

Re: Hot Air Station - Air Pump Failing

Over time of use the volume of vacuum or air supply slowly decrease
I have not found a way to repair them

[capwizard]

Re: Hot Air Station - Air Pump Failing

You will need a vacuum pump.

https://okelectronic.wordpress.com/2013/04/

My suggestion is this one. (picture 1)

[stj]

Re: Hot Air Station - Air Pump Failing

for a blower??
lol

what may be interesting, but financially questionable:
convert it with a new handpiece with a fan in it.
only problem, the fan is 12 or 24v and the original pump isnt.

[caphair]

Re: Hot Air Station - Air Pump Failing

Over time of use the volume of vacuum or air supply slowly decrease
I have not found a way to repair them

Good to know. I'll just live with it for now I guess.

[caphair]

Re: Hot Air Station - Air Pump Failing

for a blower??
lol

what may be interesting, but financially questionable:
convert it with a new handpiece with a fan in it.
only problem, the fan is 12 or 24v and the original pump isnt.

Don't the models with the fan in the wand have weaker airflow?

[stj]

Re: Hot Air Station - Air Pump Failing

weaker? as in pressure, or flow?

either way, i dont see why it would matter - i use mine at about 20-25%.
dont be a Rossmann, dont blow your smd across the desk!!

new video out today - i call it - the flying sub-module!!
https://www.youtube.com/watch?v=vBaaa-aajiM

[caphair]

Re: Hot Air Station - Air Pump Failing

Pressure mostly. I like to use higher air lower temp. Found out it’s safer for most things. Or maybe that’s just how I learned

[stj]

Re: Hot Air Station - Air Pump Failing

pressure - unknown.
you would need some type of restrictor and flow meter to know that.

[caphair]

Re: Hot Air Station - Air Pump Failing

pressure - unknown.
you would need some type of restrictor and flow meter to know that.

Flow then lol