Post by kraftt on Jun 8, 2020 21:46:15 GMT -5
My new MT55cc was just shipped, FINALLY, after a seemingly absurd (to me) time to ship (Ordered May 26). Has anyone else had longish delays with Timberwolf lately? They wouldn't ship what they had and the rest of the order later without making me pay more shipping, and I was kind of off-put by that (and being a cheapskate, opted to wait instead of paying another ~$30 for shipping).
Anyway, other than that being irksome (and probably off-topic), Timberwolf mentioned in their shipping emial that the MT55 has a "motor modulation" feature; I remember reading elsewhere that it is something that many have experienced; has anyone had any issues with cutting quality using those slow speeds, other than it seems weird to have a modulation like this? Coming from a background where VFDs are used all the time for exacting speed / torque control, it seems odd to have modulation on the speed like that, but if it doesn't affect cut quality, I don't really care other than think it's odd.
The Mafell MT55cc has a motor control module that causes the motor to modulate at the lower speeds that would typically be used for cutting materials like plastic or DiBond. Most customers operate it at the full speed of "6" when cutting wood, and modulating does not come up as an issue. However, we wanted you to be aware of this feature and not be surprised by it. When load is placed on the saw when cutting wood, the saw will maintain a constant speed for perfect cutting but it also has the sensitivity to stop the motor in the event of an unlikely jam. In order to achieve both features, there is a slight modulation of the motor when there is no load on it.
I think this has to do with how mafell gets around not having a riving knife. They employed an electronic safety measure to comply with protection regulation.
"...MAFELL has combined the benefits of enhanced active safety, improved handling and enhanced cut quality – without a riving knife. According to the manufacturer, active kick-back protection averts the danger of recoil when the blade enters the work more effectively than a riving knife. In addition, design measures introduced alongside standard EN 60745-2-5, which entered force in 2007, have increased the passive safety of saws that dispense with a riving knife..."