Robotic soldering: a buyer's guide
How to specify a soldering robot: joint access, thermal mass, head type, fixturing and the questions worth asking any supplier.
Specifying a soldering robot starts with the joint, not the machine. Joint access, thermal mass, pitch and board warpage determine whether an iron tip or a laser is appropriate, how many heads are worth having, and whether vision alignment is optional or essential.
Start with the joint
Can a tip physically reach it? Tip access is the first disqualifier and the one most easily checked with a sample board.
What is the thermal mass on either side? A heavy ground plane pulls heat away and changes dwell time far more than the machine does.
What is the pitch, and how close is the nearest heat-sensitive component?
Then the throughput
Count joints per board, not boards per hour. Cycle time is joints multiplied by dwell plus travel.
A second head is the cheapest way to halve cycle time on a high-joint-count board — cheaper than a second machine.
Then the variation
How much do your boards vary — warp, panel-to-panel offset, mixed products? Vision alignment stops that variation becoming missed joints.
How often do you change over? Fixture design and program storage matter more in a high-mix shop than raw speed does.
Questions worth asking any supplier
Will you run my board before I buy, and will you show me the footage?
Where is the machine held, and what is the lead time in days?
Who supports it, and are they the people who configured it?
What are the consumables, what do they cost, and are they in stock?
Commonly asked
What is the difference between iron and laser soldering?
An iron tip conducts heat through physical contact and suits accessible joints with a solid thermal path. Laser soldering delivers energy without touching the board, which matters for heat-sensitive components, tight pitches and joints an iron cannot physically reach.
How do we know it will work on our board?
Send it. We run your actual assembly on the machine you are evaluating, film the run, and return cycle times and joint quality. That is a better answer than any specification comparison.
Get the answer for your actual part
A guide can only take you so far. Send us the board, the fluid or the fastener and we will run it, film it, and come back with cycle times and a quote.
- Official QUICK & TechMan source
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