Pro/Forums - View Single Post - Updated: Non Production CSP Pump's in consumers hands.

Dave · 01-12-2006, 06:48 AM

I openly admit we have no idea how the reviewer models would have lasted this long, they should not have. We designed the pumps with the thermo conductive potting compound from day one.

Brians we have had a VERY low return rate, less then 1%, the MAG's are doing very well in field, with the exception of the "ticking" sound reported.
For most it goes away, for a few it gets worse.

I have had 3 "ticking" pumps returned to date, two had damaged impellers, and one a damaged shaft. The shaft turned out to be a heat treating issue causing the material to be "soft". We changed to Tunsten shafts about 6 months back, as they do not require heat treating.

We also discovered, people can damage the bottom bearing if they dis-assemble the pump, and "drop" the impeller back in during assembly.
The magnetic force is strong and will pull the impeller down fast enough to slam into the bottom bearing, if not aligned, causing bearing damage.

We tried to figure out a way to fix this problem 100% with the MarkII, and could not. We changed the bottom mounting to allow more shock, and plan to add an re-assembly proceedure to the MarkII manual.

We understand that people need to take pumps apart to clean them, mostly newbee's of course, and "sealing" the units is not an option.

For the damaged impellers, we strenghten the impellers several months ago, and have had no re-occurance to date.
With the MarkII, the impellers have even more strengh, just in case. Given it was a new mold, I had the chance to overdesign.

As too damaged cords, we changed cord mounting about 8 months back, and it helped some. Do not think we can make the cords 100% damage proof. Believe it or not, I have many people admit they "carried" the pump around by the cord. The retail MAG with AL drive case is a heavy unit, the MarkII is all injected, and with less weight people will have a much harder time damaging the cords, even if they do carried the pump that way.

But I think we are way off track here?
Breach post pictures of a water damaged pump...... Alot of you jump on us.

We presented the fact production model MAG's can NOT be water damaged, and now this tread is going why off topic.

I admit this would be a MAJOR design problem, if is was so, but it is not the case.

01-12-2006, 06:48 AM	#29
Dave Cooling Savant Join Date: Oct 2004 Location: Canada Posts: 260	Re: Updated: Non Production CSP Pump's in consumers hands. I openly admit we have no idea how the reviewer models would have lasted this long, they should not have. We designed the pumps with the thermo conductive potting compound from day one. Brians we have had a VERY low return rate, less then 1%, the MAG's are doing very well in field, with the exception of the "ticking" sound reported. For most it goes away, for a few it gets worse. I have had 3 "ticking" pumps returned to date, two had damaged impellers, and one a damaged shaft. The shaft turned out to be a heat treating issue causing the material to be "soft". We changed to Tunsten shafts about 6 months back, as they do not require heat treating. We also discovered, people can damage the bottom bearing if they dis-assemble the pump, and "drop" the impeller back in during assembly. The magnetic force is strong and will pull the impeller down fast enough to slam into the bottom bearing, if not aligned, causing bearing damage. We tried to figure out a way to fix this problem 100% with the MarkII, and could not. We changed the bottom mounting to allow more shock, and plan to add an re-assembly proceedure to the MarkII manual. We understand that people need to take pumps apart to clean them, mostly newbee's of course, and "sealing" the units is not an option. For the damaged impellers, we strenghten the impellers several months ago, and have had no re-occurance to date. With the MarkII, the impellers have even more strengh, just in case. Given it was a new mold, I had the chance to overdesign. As too damaged cords, we changed cord mounting about 8 months back, and it helped some. Do not think we can make the cords 100% damage proof. Believe it or not, I have many people admit they "carried" the pump around by the cord. The retail MAG with AL drive case is a heavy unit, the MarkII is all injected, and with less weight people will have a much harder time damaging the cords, even if they do carried the pump that way. But I think we are way off track here? Breach post pictures of a water damaged pump...... Alot of you jump on us. We presented the fact production model MAG's can NOT be water damaged, and now this tread is going why off topic. I admit this would be a MAJOR design problem, if is was so, but it is not the case. Last edited by Dave; 01-12-2006 at 07:35 AM.