Hi all. We have been working to correct this problem and should have new firmware out in 7-10 days. I posted this (below) as a comment on DC Rainmaker's Quarq DZero review and it's worth repeating here. I should also verify that DZero power meters cannot use a magnet for cadence.
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Quarq’s accelerometer cadence was designed so that a cadence discrepancy in any single pedal stroke would be adjusted in the next pedal stroke. Therefore cumulative accuracy is unaffected and there is little or no impact on cumulative power values such as kilojoules, average power and normalized power. In objective terms, single pedal stroke accuracy in the worst conditions varied from magnet-based cadence by a maximum of 2%. And benchmark tests showed the accuracy of Quarq’s accelerometer cadence matched or surpassed other products that use accelerometers. We shared this information in the Quarq website’s FAQ for many years.
With Quarq DZero we received reports and saw ourselves that cadence would sometimes bounce up and down on head units around a steady/single value. Thanks to great input (and patience) from customers and sound work by our engineers we have removed the bouncing from the display but also improved the sampling rate and further refined accelerometer readings such that DZero now matches the accuracy of magnet-based cadence in most conditions.
The new DZero firmware is going through the final stages of testing now.
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Quarq’s accelerometer cadence was designed so that a cadence discrepancy in any single pedal stroke would be adjusted in the next pedal stroke. Therefore cumulative accuracy is unaffected and there is little or no impact on cumulative power values such as kilojoules, average power and normalized power. In objective terms, single pedal stroke accuracy in the worst conditions varied from magnet-based cadence by a maximum of 2%. And benchmark tests showed the accuracy of Quarq’s accelerometer cadence matched or surpassed other products that use accelerometers. We shared this information in the Quarq website’s FAQ for many years.
With Quarq DZero we received reports and saw ourselves that cadence would sometimes bounce up and down on head units around a steady/single value. Thanks to great input (and patience) from customers and sound work by our engineers we have removed the bouncing from the display but also improved the sampling rate and further refined accelerometer readings such that DZero now matches the accuracy of magnet-based cadence in most conditions.
The new DZero firmware is going through the final stages of testing now.
Last edited by:
troy@quarq: Apr 26, 17 14:03