Talk:PCB Manufacturers

Table

This list is full of FIXME's, I'm not sure if anybody's working actively on those. I was going to implement a table of capabilities/etc. but then I saw that several fabs have all sorts of special case mentions. Perhaps a subset could be used; the user can always go straight to the fab's website/page to find out the nitty-gritty. Question is, though, what subset should be included?

A specifically difficult metric is pricing comparison. Two layers vs 4 layers vs 6 layers vs 8 layers etc. makes for a quickly-expanding table of hell. Perhaps 3 typical cases could be suggested next to a 'square inch' which seem ubiquitous, and each calculated at each fab, as an indicator only. For limited cases, a fab could be listed on more than one row (e.g. BatchPCB's 2 layer vs 4 layer differences).

Below is an example/test table to play with.

Fab	Layers	Traces	Annulars	Spacing	Clearance	Drill	Vias	Mask	Silkscreen
BatchPCB 2-layer	2	8	-	8	X	20-500	Y	red?	-
BatchPCB 4-layer	4	6	-	6	X	13-500	Y	red?	-
DorkbotPDX	4	6	7	6	15	13-260	Y	purple	~200
Pad2Pad (low cost)	2	8	-	-	-	20-	Y	green	~167

Transposing the rows/columns may be a better layout choice, though that will most definitely cause horizontal scrolling, and is a lot more difficult to edit. And apparently there's no method to sort the columns by a given row. Darn :)

Fab	BatchPCB 2-layer	BatchPCB 4-layer	DorkbotPDX	Pad2Pad (low cost)
Layers	2	4	4	2
Traces	8	6	6	8
Annulars	-	-	7	-
Spacing	8	6	6	-
Clearance	X	X	15	-
Drill	20-500	13-500	13-260	20-
Vias	Y	Y	Y	Y
Mask	red	red	purple	green
Silkscreen	-	-	~200	~167

Kamiquasi 23:25, 10 August 2011 (UTC)

The tables Kamiquasi made look really nice. If we make a table like this, I want each row of the table to link directly to the "capabilities" page where we got the data in that row -- to make it easier for people to confirm that the current values are correct, and if not, to update them.

I agree that there are a lot of special cases that don't seem to fit a rectangular table. If that data is usually not necessary for PCB design, and it's easy to get from the "capabilities" link, I'm happy with deleting it from this page.

When I started editing this page, I was doing circuit board layout and wondering "Hey, how big do I really need to make the outer diameter of the vias?". Alas, I haven't seen *any* manufacturer directly state the outer diameter I need to draw for vias so they work fine when fabbed with their standard process. :-( I prefer to pick a via size that I'm sure that several manufacturers can easily manufacture using their low-cost standard process. So what size is that?

So this page started out as a few random examples of PCB manufacturers and how big to make the vias, etc., to fit their "minimum" process.

Then I discovered that if I actually designed to those "minimum" numbers, it took longer to get the hard PCB prototypes in my hand, than if I had designed to their "standard" process. Also, I got hit with a big fee for using their "non-standard" extra-small process. And it was a big hassle to re-lay-out the board, spreading everything out a little to make room for slightly larger vias. Which led to the "preferred" vs "minimum" subsections for each fab.

Then the page exploded into a huge list of every PCB manufacturer anyone around here had ever heard of. --DavidCary (talk) 09:46, 5 June 2014 (PDT)

How to Repair Motor Repair

The motor is one of the indispensable equipments in manufacturing, and various faults will inevitably occur in the motor in actual operation. In order to ensure the normal operation of the motor, FS Technology recommends: normal use according to the operating procedures, normal monitoring and maintenance during operation, regular inspection, and good maintenance of the motor. FS Technology introduces common motor faults and motor maintenance knowledge to you.

Motor maintenance method How to repair the abnormal heat of the motor The maintenance method is generally to replace the motor or carry out maintenance.

The no-load current of the motor is greater than the limit data of the reference table If this phenomenon occurs, it means that the motor is faulty. The possible reasons are:

The mechanical friction inside the motor is too large Coil part short circuit Magnetic steel demagnetization DC motor commutator carbon deposits Product Quality Issues for PCB Suppliers The maintenance method is generally to replace the motor, or replace the carbon brush to clean up the carbon deposits. Of course, the best way is to choose a suitable PCB manufacturing company. FS Technology has the most advanced PCB manufacturing equipment and can assemble the best motor for you.

Turnkey PCB Assembly

What is the maximum no-load current of various motors without fault? When the rated voltage of the motor is 24V, when the rated voltage is 36V:

Side mounted motor 2.2A1.8A; High-speed brushed motor 1.7A1.0A; Low-speed brushed motor 1.0A0.6A; High-speed brushless motor 1.7A0.6A; Low speed brushless motor 1.0A0.6A. Motor temperature rises too high or smoke This failure is a manifestation of motor overheating. There are many reasons for this: factors other than the motor (such as poor power supply quality, excessive load, high ambient temperature, poor ventilation, damage to PCB components, etc.); and the motor itself.

Common causes and countermeasures of the motor itself:

(1) Obtain services from a one-stop PCB assembly company with PCB component procurement capabilities.

pcb component procurement

(2) The stator winding is short-circuited or grounded between turns or phases, which increases the current and increases the copper loss. If the fault is not serious, just repack the insulation, and replace the winding if it is serious.

(3) The single-phase winding of the stator is disconnected, or a branch of the parallel winding is disconnected, causing the three-phase current to be unbalanced and the winding to overheat.

(4) Rotor rod is damaged. Solder PCB components or replace copper bar rotors, replace cast aluminum rotors.

(5) The stator and rotor rub against each other. Check whether the bearing is loose and whether the stator and rotor are poorly assembled.

(6) The ambient temperature is high, the surface of the motor is dirty, or the air duct is blocked.

(7) The motor fan is faulty and the ventilation is poor.

(8) The winding connection is wrong, and the star is mistakenly connected into a triangle or vice versa.

Bearing overheating When the temperature of the motor rolling bearing exceeds 95°C and the temperature of the sliding bearing exceeds 80°C, the bearing is overheated. The reasons and countermeasures are as follows:

(1) If the bearing is damaged, it should be replaced.

(2) Too little or too much grease for rolling bearings or impurities such as iron chips. The capacity of the grease should not exceed 70% of the volume of the bearing and bearing cap, and should be replaced if there are impurities.

(3) The bearing and end cover are too tight or too loose. Machine the bearing chamber when it is too tight, and insert the steel sleeve into the end cover when it is too loose.

(4) Poor assembly of the motor end cover or bearing cover. Flatten the end cap or bearing cap and tighten the screws.

(5) The drive belt is too tight or the coupling is poorly assembled. Adjust belt tension and correct coupling.

(6) The lubricating oil of the sliding bearing is too little, there are impurities or the oil ring is stuck, should add oil, replace the new oil, repair or replace the oil ring.

(7) The bearing clearance is too large or too small.

pcb component procurement

(8) The motor shaft is bent. (9) There are many reasons for this, and the above cannot be listed all. If you need to see more reasons, you can come to the FS Technology PCBA blog.

abnormal noise (1) When the stator and the rotor rub against each other, there will be a harsh "fork" friction sound. Bearings should be inspected and damaged bearings replaced. If the bearing is not damaged and the inner or outer ring of the bearing is found to be missing, insert the sleeve or replace the bearing and end cover.

(2) The motor is out of phase, and the roaring sound is particularly loud. You can turn off the power and turn it off to see if it can start normally again. If it does not start, there may be an open circuit in one of the phases. If the contacts of the switch and the contactor are not connected, a phase failure will also occur.

(3) When the bearing is seriously short of oil, the bearing cavity will make a "hissing" sound. Bearings should be cleaned and new oil added.

(4) When the fan blade touches the casing or there is debris, there will be a knocking sound. The fan blades should be aligned to remove debris from around the fan blades.

(5) The rotor bar is broken, and there is a "humming" sound when it is high and low, the speed is also slowed down, and the current increases.

(6) The wiring of the stator winding is wrong, there is a low roar, and the speed also drops.

(7) The stator and rotor cores are loose.

the motor maintenance strategy 1. We should keep the operating environment dry and clean the surface of the motor in time to prevent dust and fibers from blocking the air inlet.

2. When the thermal protection of the motor operates continuously, it is necessary to accurately determine the cause of the fault, whether it is overload or the setting value of the protection device is too low. Do not put into operation immediately after troubleshooting.

3. When the motor runs for about 5000 hours, it is necessary to replenish or replace the motor lubricating oil immediately. The operator needs to observe the condition of the bearing at any time, and replace it in time when it is found that the bearing is overheated or the lubrication is deteriorated. When replacing the grease, it is necessary to clean the old lubricating oil in advance, and use gasoline to clean the oil groove of the bearing and the bearing cover, and then fill the ZL-3 lithium base grease to 1/2 of the space between the bearings. lumen. and bearing outer ring (2 poles) and 2/3 (4, 6 and 8 poles).

4. The service life of the bearing is limited. When the service life of the bearing is about to end, the vibration and noise of the motor increase significantly. When the radial clearance of the bearing reaches the following values, the bearing should be replaced.

5. When disassembling the motor, the rotor can be removed from the shaft extension end or the non-extension end. It would be easier to remove the rotor from the non-shaft extension if we didn't need to remove the fan. When removing the rotor from the stator, damage to the stator windings or insulation must be prevented.

6. When the winding needs to be replaced, the form, size, number of turns, wire gauge, etc. of the original winding must be recorded. When these data are lost, they should be obtained from the manufacturer, and the original design windings should be changed at will.One or more performance degradations are not even usable.